CVE-2026-43349

MEDIUMCVSS · not yet scored5.5
EchelonGraph scoreLOW confidence

Score 5.5 from GitHub Security Advisory published 2026-05-08.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit 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:

f2fs: fix to avoid uninit-value access in f2fs_sanity_check_node_footer

syzbot reported a f2fs bug as below:

BUG: KMSAN: uninit-value in f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520 f2fs_sanity_check_node_footer+0x374/0xa20 fs/f2fs/node.c:1520 f2fs_finish_read_bio+0xe1e/0x1d60 fs/f2fs/data.c:177 f2fs_read_end_io+0x6ab/0x2220 fs/f2fs/data.c:-1 bio_endio+0x1006/0x1160 block/bio.c:1792 submit_bio_noacct+0x533/0x2960 block/blk-core.c:891 submit_bio+0x57a/0x620 block/blk-core.c:926 blk_crypto_submit_bio include/linux/blk-crypto.h:203 [inline] f2fs_submit_read_bio+0x12c/0x360 fs/f2fs/data.c:557 f2fs_submit_page_bio+0xee2/0x1450 fs/f2fs/data.c:775 read_node_folio+0x384/0x4b0 fs/f2fs/node.c:1481 __get_node_folio+0x5db/0x15d0 fs/f2fs/node.c:1576 f2fs_get_inode_folio+0x40/0x50 fs/f2fs/node.c:1623 do_read_inode fs/f2fs/inode.c:425 [inline] f2fs_iget+0x1209/0x9380 fs/f2fs/inode.c:596 f2fs_fill_super+0x8f5a/0xb2e0 fs/f2fs/super.c:5184 get_tree_bdev_flags+0x6e6/0x920 fs/super.c:1694 get_tree_bdev+0x38/0x50 fs/super.c:1717 f2fs_get_tree+0x35/0x40 fs/f2fs/super.c:5436 vfs_get_tree+0xb3/0x5d0 fs/super.c:1754 fc_mount fs/namespace.c:1193 [inline] do_new_mount_fc fs/namespace.c:3763 [inline] do_new_mount+0x885/0x1dd0 fs/namespace.c:3839 path_mount+0x7a2/0x20b0 fs/namespace.c:4159 do_mount fs/namespace.c:4172 [inline] __do_sys_mount fs/namespace.c:4361 [inline] __se_sys_mount+0x704/0x7f0 fs/namespace.c:4338 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4338 x64_sys_call+0x39f0/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:166 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The root cause is: in f2fs_finish_read_bio(), we may access uninit data in folio if we failed to read the data from device into folio, let's add a check condition to avoid such issue.

CVSS v3
—
EG Score
5.5MEDIUMlow confidence
EG Risk
29
EG Risk 29/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
EPSS PROB
0.2%
EPSS %ILE
4th
KEV
Not listed

Published

May 8, 2026

Last Modified

June 14, 2026

References (3)

Vendor Advisories for CVE-2026-43349(1)

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

Patch Availability(6)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-27.27) @ resolute2026-08-23ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1014.14) @ resolute2026-08-23ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1013.13) @ resolute2026-08-23ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-23ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-23ubuntu
linuxKernel @ 6.18.25 (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

(1 across 1 ecosystem)
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.0.1-1~exp1 (133 versions)
  • every version up to 7.0.3-1: fixed in 7.0.3-1
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

All Vendor Advisories

(5)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 7× in last 7d / 23× 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 100 of 195 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. None are among the latest 100 rows. The 95 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  2. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  3. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  4. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  5. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  6. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  7. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  8. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  9. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  10. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  11. 2026-09-30 08:28 UTCOSV refresh
  12. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  13. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.2% · 4th percentile
  14. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  19. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  20. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  21. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-09-11 14:53 UTCOSV refresh
  23. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  24. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  25. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.1% · 1st percentile
Show 75 more
  1. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  2. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  3. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  4. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  5. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  6. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  7. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  8. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  9. 2026-08-23 19:13 UTCEG score recompute
  10. 2026-08-23 19:13 UTCVendor advisory
  11. 2026-08-23 19:13 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  12. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  13. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  14. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  15. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  16. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  17. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  18. 2026-08-17 11:55 UTCEG score recompute
  19. 2026-08-17 11:55 UTCVendor advisory
  20. 2026-08-17 11:55 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  21. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  22. 2026-08-16 04:37 UTCEG score recompute
  23. 2026-08-16 04:37 UTCVendor advisory
  24. 2026-08-16 04:37 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  25. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  26. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  27. 2026-08-14 03:11 UTCEG score recompute
  28. 2026-08-14 03:11 UTCVendor advisory
  29. 2026-08-14 03:11 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  30. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  31. 2026-08-12 16:46 UTCEG score recompute
  32. 2026-08-12 16:46 UTCVendor advisory
  33. 2026-08-12 16:46 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  34. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  35. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  36. 2026-08-11 05:25 UTCEG score recompute
  37. 2026-08-11 05:25 UTCVendor advisory
  38. 2026-08-11 05:25 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  39. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  40. 2026-08-10 04:30 UTCEG score recompute
  41. 2026-08-10 04:30 UTCVendor advisory
  42. 2026-08-10 04:30 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  43. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  44. 2026-08-09 03:35 UTCEG score recompute
  45. 2026-08-09 03:35 UTCVendor advisory
  46. 2026-08-09 03:35 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  47. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  48. 2026-08-08 02:40 UTCEG score recompute
  49. 2026-08-08 02:40 UTCVendor advisory
  50. 2026-08-08 02:40 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  51. 2026-08-07 01:45 UTCEG score recompute
  52. 2026-08-07 01:45 UTCVendor advisory
  53. 2026-08-07 01:45 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  54. 2026-08-06 13:46 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  55. 2026-08-05 22:09 UTCEG score recompute
  56. 2026-08-05 22:09 UTCVendor advisory
  57. 2026-08-05 22:09 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  58. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  59. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  60. 2026-08-04 10:38 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  61. 2026-08-04 04:53 UTCEG score recompute
  62. 2026-08-04 04:53 UTCVendor advisory
  63. 2026-08-04 04:53 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  64. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  65. 2026-08-03 03:57 UTCVendor advisory
  66. 2026-08-03 03:57 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  67. 2026-08-02 03:01 UTCEG score recompute
  68. 2026-08-02 03:01 UTCVendor advisory
  69. 2026-08-02 03:00 UTCGHSA enrichmentGHSA-9fq9-rx75-mm5g · GitHub CVSS 5.5
  70. 2026-08-02 02:27 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  71. 2026-07-30 16:28 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  72. 2026-07-30 01:30 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  73. 2026-07-28 15:36 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  74. 2026-07-27 14:13 UTCEPSS rescoreEPSS 0.1% · 1st percentile
  75. 2026-07-26 14:54 UTCEPSS rescoreEPSS 0.1% · 1st percentile

Related CVEs(same vendor + same CWE)

Frequently asked(4)

What is CVE-2026-43349?
CVE-2026-43349 is a medium vulnerability published on May 8, 2026. In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid uninit-value access in f2fssanitychecknodefooter syzbot reported a f2fs bug as below: BUG: KMSAN: uninit-value in f2fssanitychecknodefooter+0x374/0xa20 fs/f2fs/node.c:1520 f2fssanitychecknodefooter+0x374/0xa20…
When was the CVE record for CVE-2026-43349 published?
The CVE record for CVE-2026-43349 was published on May 8, 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 June 14, 2026; the record at its source may have been updated since.
Is CVE-2026-43349 actively exploited?
CVE-2026-43349 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (4th percentile of EPSS-scored CVEs).
How do I remediate CVE-2026-43349?
A fix for CVE-2026-43349 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-43349 are linked in the Vendor Advisories panel on this page.

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