CVE-2023-53692

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2025-10-22. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this week

Also known asEUVD-2023-60036 (ENISA EUVD) · GHSA-f427-wg66-92gr (GitHub Security Advisories)Source: ENISA EUVD

7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In the Linux kernel, the following vulnerability has been resolved:

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline

Syzbot found the following issue: loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000 without journal. Quota mode: none. ================================================================== BUG: KASAN: use-after-free in ext4_ext_binsearch_idx fs/ext4/extents.c:768 [inline] BUG: KASAN: use-after-free in ext4_find_extent+0x76e/0xd90 fs/ext4/extents.c:931 Read of size 4 at addr ffff888073644750 by task syz-executor420/5067

CPU: 0 PID: 5067 Comm: syz-executor420 Not tainted 6.2.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 print_address_description+0x74/0x340 mm/kasan/report.c:306 print_report+0x107/0x1f0 mm/kasan/report.c:417 kasan_report+0xcd/0x100 mm/kasan/report.c:517 ext4_ext_binsearch_idx fs/ext4/extents.c:768 [inline] ext4_find_extent+0x76e/0xd90 fs/ext4/extents.c:931 ext4_clu_mapped+0x117/0x970 fs/ext4/extents.c:5809 ext4_insert_delayed_block fs/ext4/inode.c:1696 [inline] ext4_da_map_blocks fs/ext4/inode.c:1806 [inline] ext4_da_get_block_prep+0x9e8/0x13c0 fs/ext4/inode.c:1870 ext4_block_write_begin+0x6a8/0x2290 fs/ext4/inode.c:1098 ext4_da_write_begin+0x539/0x760 fs/ext4/inode.c:3082 generic_perform_write+0x2e4/0x5e0 mm/filemap.c:3772 ext4_buffered_write_iter+0x122/0x3a0 fs/ext4/file.c:285 ext4_file_write_iter+0x1d0/0x18f0 call_write_iter include/linux/fs.h:2186 [inline] new_sync_write fs/read_write.c:491 [inline] vfs_write+0x7dc/0xc50 fs/read_write.c:584 ksys_write+0x177/0x2a0 fs/read_write.c:637 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f4b7a9737b9 RSP: 002b:00007ffc5cac3668 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f4b7a9737b9 RDX: 00000000175d9003 RSI: 0000000020000200 RDI: 0000000000000004 RBP: 00007f4b7a933050 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000079f R11: 0000000000000246 R12: 00007f4b7a9330e0 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000

Above issue is happens when enable bigalloc and inline data feature. As commit 131294c35ed6 fixed delayed allocation bug in ext4_clu_mapped for bigalloc + inline. But it only resolved issue when has inline data, if inline data has been converted to extent(ext4_da_convert_inline_data_to_extent) before writepages, there is no EXT4_STATE_MAY_INLINE_DATA flag. However i_data is still store inline data in this scene. Then will trigger UAF when find extent. To resolve above issue, there is need to add judge "ext4_has_inline_data(inode)" in ext4_clu_mapped().

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
Impact severity (EG Severity): CVSS 7.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
0.2%
EPSS %ILE
5th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.8): severity, escalated by confirmed exploitation. This CVE's 7.8 is its impact severity (EG Severity), not escalated.

EG Severity
7.8 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-04). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

October 22, 2025

Last Modified

October 28, 2026

Advisory Details (8)

Auto-updated Aug 5, 2026
Patch available.
Web page

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/835659598c67907b98cd2aa57bb951dfaf675c69
Web page

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/14da044725a3ab10affa3566d29c15737c0e67a4
Web page

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/11c87c8df2cae1d6be83c07e59fef0792de73482
Web page

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/96d440bee177669dc0acedca0abd73bae6a9be8b
Web page

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/40566def189c513be2c694681256d7486cc6e368
Web page

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/770b0613637f59f3091dda1ff0c23671a5326b9c
Web page

ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a34f6dcb78c654ab905642c1b4e7e5fbb4f0babe
Web page

Revert "ext4: fix delayed allocation bug in ext4_clu_mapped for bigalloc + inline" - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0ce15000dee0ecd6f235f925a327803e2ef489c6

Vendor Advisories for CVE-2023-53692(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
linuxKernel @ 4.19.271 (fixes >=0)—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
linux5.10.103-1 ... 5.10.92-2 (33 versions)
  • every version up to 5.10.191-1: fixed in 5.10.191-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.27-1
  • every version up to 6.1.37-1: fixed in 6.1.37-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.3.7-1: fixed in 6.3.7-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux—
  • every version up to 6.3.7-1: fixed in 6.3.7-1
—

Data Freshness Timeline

(refreshed 9× in last 7d / 43× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 94 of 232 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. 6 repeat rows among the latest 100 are merged into the row they repeat. The 138 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-06 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  2. 2026-11-05 16:33 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  3. 2026-11-05 03:34 UTCEG score recompute
  4. 2026-11-05 03:34 UTCGHSA enrichmentGHSA-f427-wg66-92gr · GitHub severity HIGH · GitHub CVSS 7.8
  5. 2026-11-04 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  6. 2026-11-03 16:41 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  7. 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  8. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  9. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  10. 2026-10-30 16:31 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  11. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  12. 2026-10-28 19:28 UTCEG score recompute
  13. 2026-10-28 19:28 UTCGHSA enrichmentGHSA-f427-wg66-92gr · GitHub severity HIGH · GitHub CVSS 7.8
  14. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  15. 2026-10-28 13:01 UTCEG score recompute
  16. 2026-10-28 13:01 UTCGHSA enrichmentGHSA-f427-wg66-92gr · GitHub severity HIGH · GitHub CVSS 7.8
  17. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  18. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  19. 2026-10-25 17:27 UTCEG score recompute
  20. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  21. 2026-10-24 16:29 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  22. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  23. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-10-20 21:14 UTCEG score recompute
Show 69 more
  1. 2026-10-20 21:14 UTCGHSA enrichmentGHSA-f427-wg66-92gr · GitHub severity HIGH · GitHub CVSS 7.8
  2. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-10-19 14:25 UTCOSV refresh
  5. 2026-10-18 16:29 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  6. 2026-10-18 07:40 UTCEG score recompute
  7. 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-15 16:29 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-10-14 16:30 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-10-13 16:30 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  12. 2026-10-12 18:12 UTCEG score recompute
  13. 2026-10-12 16:31 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  14. 2026-10-11 21:37 UTCEG score recompute
  15. 2026-10-11 13:45 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  16. 2026-10-10 19:58 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  17. 2026-10-09 20:05 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  18. 2026-10-08 17:06 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  19. 2026-10-07 23:46 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  20. 2026-10-06 15:15 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  21. 2026-10-05 17:41 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  22. 2026-10-04 23:20 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  23. 2026-10-03 14:23 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  24. 2026-10-01 19:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  25. 2026-09-30 16:37 UTCEG score recompute
  26. 2026-09-30 15:01 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  27. 2026-09-29 15:17 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  28. 2026-09-28 13:49 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  29. 2026-09-26 20:42 UTCOSV refresh
  30. 2026-09-26 00:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  31. 2026-09-24 14:01 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  32. 2026-09-23 13:46 UTCEPSS rescoreEPSS 0.2% · 5th percentile
  33. 2026-09-20 20:14 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  34. 2026-09-18 19:26 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  35. 2026-09-16 14:06 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  36. 2026-09-16 05:11 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  37. 2026-09-15 03:08 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  38. 2026-09-13 16:45 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  39. 2026-09-12 14:58 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  40. 2026-09-11 14:51 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  41. 2026-09-11 09:34 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  42. 2026-09-08 21:58 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  43. 2026-09-07 15:59 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  44. 2026-09-07 06:48 UTCOSV refresh
  45. 2026-09-06 13:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  46. 2026-09-04 05:04 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  47. 2026-09-02 14:10 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  48. 2026-09-01 13:52 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  49. 2026-09-01 04:36 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  50. 2026-08-30 19:15 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  51. 2026-08-30 01:20 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  52. 2026-08-28 21:39 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  53. 2026-08-27 14:23 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  54. 2026-08-26 14:44 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  55. 2026-08-25 13:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  56. 2026-08-23 00:17 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  57. 2026-08-21 23:47 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  58. 2026-08-20 22:53 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  59. 2026-08-20 16:01 UTCOSV refresh
  60. 2026-08-19 17:02 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  61. 2026-08-18 13:46 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  62. 2026-08-16 14:54 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  63. 2026-08-16 02:12 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  64. 2026-08-15 01:28 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  65. 2026-08-13 21:58 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  66. 2026-08-12 13:49 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  67. 2026-08-11 13:40 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  68. 2026-08-10 23:58 UTCEPSS rescoreEPSS 0.1% · 4th percentile
  69. 2026-08-09 13:44 UTCEPSS rescoreEPSS 0.1% · 4th percentile

Frequently asked(5)

What is CVE-2023-53692?
CVE-2023-53692 is a high-severity vulnerability; its CVE record was published on October 22, 2025. In the Linux kernel, the following vulnerability has been resolved: ext4: fix use-after-free read in ext4_find_extent for bigalloc + inline Syzbot found the following issue: loop0: detected capacity change from 0 to 2048 EXT4-fs (loop0): mounted filesystem 00000000-0000-0000-0000-000000000000…
When was the CVE record for CVE-2023-53692 published?
The CVE record for CVE-2023-53692 was published on October 22, 2025. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 28, 2026; the record at its source may have been updated since.
Is CVE-2023-53692 actively exploited?
CVE-2023-53692 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (5th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2023-53692?
CVE-2023-53692 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2023-53692?
A fix for CVE-2023-53692 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2023-53692 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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