CVE-2026-74722

UNRATEDCVSS · not yet scoredTrending — 3 sources updated this week

Also known asEUVD-2026-64409 (ENISA EUVD) · GHSA-424m-4r3p-f43g (GitHub Security Advisories)Source: ENISA EUVD

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EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • No CVSS published and no exploitation signals yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS v2: —Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

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

btrfs: fix memory leak in btrfs_do_encoded_write()

Local fuzzing of 6.12.94 has found the following memory leak:

Unreferenced object 0xffff888018050a80 (size 64): comm "syz.0.17", pid 10297, jiffies 4294953601 hex dump (first 32 bytes): 00 10 00 00 00 00 00 00 01 00 00 00 00 00 00 00 ................ 10 0a 05 18 80 88 ff ff 10 0a 05 18 80 88 ff ff ................ backtrace (crc a8a6fc29): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] extent_changeset_alloc fs/btrfs/extent_io.h:207 [inline] qgroup_reserve_data+0x1c5/0x7d0 fs/btrfs/qgroup.c:4305 btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355 btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746 btrfs_encoded_write fs/btrfs/file.c:1482 [inline] btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507 btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738 btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Unreferenced object 0xffff888018050a00 (size 64): comm "syz.0.17", pid 10297, jiffies 4294953601 hex dump (first 32 bytes): 00 00 00 00 00 00 00 00 ff 0f 00 00 00 00 00 00 ................ 90 0a 05 18 80 88 ff ff 90 0a 05 18 80 88 ff ff ................ backtrace (crc cb5c9580): kmemleak_alloc_recursive include/linux/kmemleak.h:42 [inline] slab_post_alloc_hook mm/slub.c:4152 [inline] slab_alloc_node mm/slub.c:4197 [inline] __kmalloc_cache_noprof+0x168/0x2c0 mm/slub.c:4358 kmalloc_noprof include/linux/slab.h:878 [inline] kzalloc_noprof include/linux/slab.h:1014 [inline] ulist_prealloc+0x9c/0x110 fs/btrfs/ulist.c:114 extent_changeset_prealloc fs/btrfs/extent_io.h:217 [inline] __set_extent_bit+0x16b/0x1a70 fs/btrfs/extent-io-tree.c:1086 set_record_extent_bits+0x50/0x90 fs/btrfs/extent-io-tree.c:1821 qgroup_reserve_data+0x274/0x7d0 fs/btrfs/qgroup.c:4312 btrfs_qgroup_reserve_data+0x2e/0xb0 fs/btrfs/qgroup.c:4355 btrfs_do_encoded_write+0x92e/0x1040 fs/btrfs/inode.c:9746 btrfs_encoded_write fs/btrfs/file.c:1482 [inline] btrfs_do_write_iter+0x280/0x610 fs/btrfs/file.c:1507 btrfs_ioctl_encoded_write+0x3d6/0x490 fs/btrfs/ioctl.c:4738 btrfs_ioctl+0x6f9/0xc90 fs/btrfs/ioctl.c:-1 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:906 [inline] __se_sys_ioctl+0xf9/0x170 fs/ioctl.c:892 do_syscall_x64 arch/x86/entry/common.c:47 [inline] do_syscall_64+0xbe/0x1a0 arch/x86/entry/common.c:78 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Fix this by freeing an extent changeset before returning from btrfs_do_encoded_write().

CVSS v3
—
EchelonGraph score
Not yet assessedNo source has published severity data for this CVE yet — no CVSS score from NVD or a CNA, no GitHub advisory, and it is not in CISA KEV. This is not a rating of zero; we cannot assess it yet.
EG Score
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EG Risk
—
EPSS PROB
0.2%
EPSS %ILE
6th
KEV
Not listed

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

EG Severity
Not assessed: no CVSS publishedA missing CVSS is not a severity of zero.
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). 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
No SSVC decision: EchelonGraph has not assessed this CVECISA 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: the BOD 26-04 block below.

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.

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

August 22, 2026

Last Modified

October 14, 2026

References (6)

Vendor Advisories for CVE-2026-74722(2)

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 @ 6.1.183 (fixes >=5.18.0)—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 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 6.1.99-1 (56 versions)
  • every version up to 6.1.187-1: fixed in 6.1.187-1
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1
  • every version up to 6.12.107-1~deb12u1: fixed in 6.12.107-1~deb12u1
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Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (33 versions)
  • every version up to 6.12.105-1: fixed in 6.12.105-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (167 versions)
  • every version up to 7.1.9-1: fixed in 7.1.9-1
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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.

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. 2 repeat rows among the latest 96 are merged into the row they repeat.

  1. 2026-10-30 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  2. 2026-10-29 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  3. 2026-10-28 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  4. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  5. 2026-10-27 12:55 UTCOSV refresh
  6. 2026-10-26 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  7. 2026-10-25 16:34 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  8. 2026-10-25 14:03 UTCEG score recompute
  9. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  10. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  11. 2026-10-22 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  12. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  13. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  14. 2026-10-19 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  15. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  16. 2026-10-18 03:14 UTCEG score recompute
  17. 2026-10-17 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  18. 2026-10-16 16:44 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  19. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  20. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  21. 2026-10-14 13:43 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  22. 2026-10-13 16:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  23. 2026-10-12 16:35 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  24. 2026-10-12 15:39 UTCEG score recompute
  25. 2026-10-11 19:25 UTCEG score recompute
Show 69 more
  1. 2026-10-11 16:41 UTCEG score recompute
  2. 2026-10-11 14:00 UTCEG score recompute
  3. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  4. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  5. 2026-10-10 14:22 UTCVendor advisory
  6. 2026-10-10 14:21 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  7. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  8. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  9. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  10. 2026-10-06 21:38 UTCVendor advisory
  11. 2026-10-06 21:38 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  12. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  13. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  14. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  15. 2026-10-03 16:35 UTCVendor advisory
  16. 2026-10-03 16:35 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  18. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  19. 2026-09-30 07:24 UTCEG score recompute
  20. 2026-09-30 07:24 UTCVendor advisory
  21. 2026-09-30 07:24 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  22. 2026-09-29 15:24 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  23. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  25. 2026-09-27 01:04 UTCVendor advisory
  26. 2026-09-27 01:04 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  27. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  28. 2026-09-26 00:28 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  29. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 10th percentile
  30. 2026-09-23 20:00 UTCVendor advisory
  31. 2026-09-23 20:00 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  32. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  33. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  34. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  35. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  36. 2026-09-20 14:32 UTCVendor advisory
  37. 2026-09-20 14:32 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  38. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  39. 2026-09-17 09:19 UTCVendor advisory
  40. 2026-09-17 09:19 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  41. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  42. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  43. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  44. 2026-09-14 04:15 UTCVendor advisory
  45. 2026-09-14 04:15 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  46. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  47. 2026-09-10 23:12 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  48. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  49. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  50. 2026-09-07 18:02 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  51. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  52. 2026-09-04 12:59 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  53. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  54. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  55. 2026-09-01 07:55 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  56. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  57. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  58. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  59. 2026-08-29 02:45 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  60. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  61. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  62. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  63. 2026-08-25 21:41 UTCEG score recompute
  64. 2026-08-25 21:41 UTCGHSA enrichmentGHSA-424m-4r3p-f43g
  65. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  66. 2026-08-24 14:18 UTCEPSS rescoreEPSS 0.2% · 6th percentile
  67. 2026-08-22 16:24 UTCNVD update
  68. 2026-08-22 15:37 UTCEG score recompute
  69. 2026-08-22 15:35 UTCMITRE cvelistV5first tracked

Frequently asked(4)

What is CVE-2026-74722?
CVE-2026-74722 is a vulnerability whose severity is not yet rated; its CVE record was published on August 22, 2026. In the Linux kernel, the following vulnerability has been resolved: btrfs: fix memory leak in btrfsdoencoded_write() Local fuzzing of 6.12.94 has found the following memory leak: Unreferenced object 0xffff888018050a80 (size 64): comm "syz.0.17", pid 10297, jiffies 4294953601 hex dump (first 32…
When was the CVE record for CVE-2026-74722 published?
The CVE record for CVE-2026-74722 was published on August 22, 2026. 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 14, 2026; the record at its source may have been updated since.
Is CVE-2026-74722 actively exploited?
CVE-2026-74722 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (6th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-74722?
A fix for CVE-2026-74722 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-74722 are linked in the Vendor Advisories panel on this page.

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