CVE-2026-89782

HIGHPre-NVD 8.48.4—
EchelonGraph scoreHIGH confidence

Score 8.4 from GitHub Security Advisory (severity: HIGH) published 2026-09-16. A secondary CVSS source baseline 8.4; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.4EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 8.4Exploit: None knownExposed services: Not assessed

No fix is confirmed yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for the fix.

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

fs/ntfs3: reject restart table growth beyond U16_MAX entries

During $LogFile replay, log_replay() indexes the transaction table by the transact_id taken from the log record header. check_log_rec() only verifies that transact_id is non-zero and properly aligned, not its magnitude, so a crafted image can request an arbitrarily large index.

alloc_rsttbl_from_idx() grows the table to cover that index via extend_rsttbl(), which passes the new entry count to init_rsttbl():

rt = init_rsttbl(esize, used + add);

used + add is computed as u32 but init_rsttbl() takes a u16, and the count is stored in struct RESTART_TABLE as a __le16. When used + add exceeds U16_MAX it is truncated, init_rsttbl() allocates a table far smaller than the index requires, and alloc_rsttbl_from_idx() then dereferences and writes at the original, untruncated offset -- an out-of-bounds access past the allocation, reachable by mounting a crafted NTFS image.

BUG: KASAN: use-after-free in alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950) Read of size 4 at addr ffff8880327ffff8 by task exploit alloc_rsttbl_from_idx (fs/ntfs3/fslog.c:950) log_replay (fs/ntfs3/fslog.c:4562) ntfs_loadlog_and_replay (fs/ntfs3/fsntfs.c:324) ntfs_fill_super (fs/ntfs3/super.c:1393) get_tree_bdev_flags vfs_get_tree path_mount __x64_sys_mount

A restart table is limited to U16_MAX entries by its __le16 count, so a larger growth request is invalid input. Reject it in extend_rsttbl(); all callers already handle a NULL return.

CVSS v3
8.4
EG Score
8.4HIGHhigh confidence
EG Risk
42
EG Risk 42/100CISA SSVC

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
Severity84% × 45%
Exploitation0% × 40%
Automatability30% × 15%
CISA SSVC: Track at low or medium mission impact; Track or Attend at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
0.2%
EPSS %ILE
7th
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track or Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation none (no KEV listing, exploit record or EPSS ≥ 50%) · Automatable unknown (not published for this CVE) · Technical impact partial (CVSS below 9.0). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

September 16, 2026

Last Modified

September 16, 2026

Advisory Details (7)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

fs/ntfs3: reject restart table growth beyond U16_MAX entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/111f8d74a19d85942ecbb3aba78f6f3c88e59391
generic

fs/ntfs3: reject restart table growth beyond U16_MAX entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/967a5ff8a614d10126b6d46db1ac040948d6cb42
generic

fs/ntfs3: reject restart table growth beyond U16_MAX entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/aad605a450611e2a7b7cf9dd5724004d39192bfb
generic

fs/ntfs3: reject restart table growth beyond U16_MAX entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/be218a01aadffe33ed4fc73e25276d676ebbd09d
generic

fs/ntfs3: reject restart table growth beyond U16_MAX entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ecde45cd81dc28f5696c312c5ce5a509962e9ab1
generic

fs/ntfs3: reject restart table growth beyond U16_MAX entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/339e59996ff193adcf1c438cf05f19e753beb3a7
generic

fs/ntfs3: reject restart table growth beyond U16_MAX entries - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/caa0ec3fc44a13d7c21d78e4722f4f05f87ccf56

Vendor Advisories for CVE-2026-89782(1)

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

Affected Packages

(4 across 3 ecosystems)
Debian:12(2)
PackageVulnerable rangeFix by version rangeDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (360 versions)
  • every version on: no fix on record
—
linux-6.126.12.100-1~deb12u1, 6.12.101-1~deb12u1, 6.12.107-1~deb12u1
  • every version up to 6.12.111-1~deb12u1: fixed in 6.12.111-1~deb12u1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 6.12.96-1 (35 versions)
  • every version up to 6.12.111-1: fixed in 6.12.111-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (179 versions)
  • every version up to 7.2.6-1: fixed in 7.2.6-1
—

Data Freshness Timeline

(refreshed 28× in last 7d / 83× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

  1. 2026-10-05 02:23 UTCEG score recompute
  2. 2026-10-05 02:23 UTCGHSA enrichment
  3. 2026-10-04 23:22 UTCEPSS rescore
  4. 2026-10-04 15:22 UTCGHSA enrichment
  5. 2026-10-04 04:08 UTCGHSA enrichment
  6. 2026-10-03 17:07 UTCEG score recompute
  7. 2026-10-03 17:07 UTCGHSA enrichment
  8. 2026-10-03 06:05 UTCGHSA enrichment
  9. 2026-10-02 19:04 UTCEG score recompute
  10. 2026-10-02 19:04 UTCGHSA enrichment
  11. 2026-10-02 08:02 UTCGHSA enrichment
  12. 2026-10-01 21:01 UTCEG score recompute
  13. 2026-10-01 21:01 UTCGHSA enrichment
  14. 2026-10-01 19:51 UTCEPSS rescore
  15. 2026-10-01 09:59 UTCGHSA enrichment
  16. 2026-09-30 22:59 UTCEG score recompute
  17. 2026-09-30 22:59 UTCGHSA enrichment
  18. 2026-09-30 15:04 UTCEPSS rescore
  19. 2026-09-30 11:58 UTCGHSA enrichment
  20. 2026-09-30 00:57 UTCEG score recompute
  21. 2026-09-30 00:57 UTCGHSA enrichment
  22. 2026-09-29 12:45 UTCGHSA enrichment
  23. 2026-09-29 01:44 UTCEG score recompute
  24. 2026-09-29 01:44 UTCGHSA enrichment
  25. 2026-09-28 14:43 UTCEG score recompute
Show 58 more
  1. 2026-09-28 14:43 UTCGHSA enrichment
  2. 2026-09-28 13:52 UTCEPSS rescore
  3. 2026-09-28 13:52 UTCEPSS rescore
  4. 2026-09-28 03:41 UTCGHSA enrichment
  5. 2026-09-27 16:40 UTCEG score recompute
  6. 2026-09-27 16:40 UTCGHSA enrichment
  7. 2026-09-27 13:49 UTCEPSS rescore
  8. 2026-09-27 05:39 UTCGHSA enrichment
  9. 2026-09-26 18:37 UTCEG score recompute
  10. 2026-09-26 18:37 UTCGHSA enrichment
  11. 2026-09-26 15:59 UTCEPSS rescore
  12. 2026-09-26 07:35 UTCEG score recompute
  13. 2026-09-26 07:35 UTCGHSA enrichment
  14. 2026-09-25 20:30 UTCGHSA enrichment
  15. 2026-09-25 09:07 UTCGHSA enrichment
  16. 2026-09-24 22:06 UTCEG score recompute
  17. 2026-09-24 22:05 UTCGHSA enrichment
  18. 2026-09-24 14:04 UTCEPSS rescore
  19. 2026-09-24 11:04 UTCGHSA enrichment
  20. 2026-09-24 00:04 UTCEG score recompute
  21. 2026-09-24 00:03 UTCGHSA enrichment
  22. 2026-09-23 17:54 UTCEPSS rescore
  23. 2026-09-23 13:02 UTCGHSA enrichment
  24. 2026-09-23 02:01 UTCEG score recompute
  25. 2026-09-23 02:01 UTCGHSA enrichment
  26. 2026-09-22 16:01 UTCEPSS rescore
  27. 2026-09-22 14:59 UTCGHSA enrichment
  28. 2026-09-22 03:58 UTCEG score recompute
  29. 2026-09-22 03:58 UTCGHSA enrichment
  30. 2026-09-21 21:09 UTCEPSS rescore
  31. 2026-09-21 16:57 UTCGHSA enrichment
  32. 2026-09-21 05:49 UTCEG score recompute
  33. 2026-09-21 05:49 UTCGHSA enrichment
  34. 2026-09-20 20:16 UTCEPSS rescore
  35. 2026-09-20 18:48 UTCGHSA enrichment
  36. 2026-09-20 07:47 UTCGHSA enrichment
  37. 2026-09-19 20:42 UTCEG score recompute
  38. 2026-09-19 20:42 UTCGHSA enrichment
  39. 2026-09-19 09:40 UTCGHSA enrichment
  40. 2026-09-18 22:36 UTCEG score recompute
  41. 2026-09-18 22:36 UTCGHSA enrichment
  42. 2026-09-18 19:28 UTCEPSS rescore
  43. 2026-09-18 11:35 UTCGHSA enrichment
  44. 2026-09-18 00:31 UTCEG score recompute
  45. 2026-09-18 00:31 UTCGHSA enrichment
  46. 2026-09-17 19:32 UTCEPSS rescore
  47. 2026-09-17 13:30 UTCGHSA enrichment
  48. 2026-09-17 02:29 UTCEG score recompute
  49. 2026-09-17 02:28 UTCGHSA enrichment
  50. 2026-09-16 15:25 UTCEG score recompute
  51. 2026-09-16 15:25 UTCGHSA enrichment
  52. 2026-09-16 14:49 UTCEG score recompute▲ 8.40
  53. 2026-09-16 14:49 UTCGHSA enrichment
  54. 2026-09-16 14:45 UTCMITRE cvelistV5CVSS v3 → 8.4 · severity → HIGH
  55. 2026-09-16 14:09 UTCEPSS rescore
  56. 2026-09-16 09:29 UTCNVD update
  57. 2026-09-16 08:52 UTCEG score recompute
  58. 2026-09-16 08:51 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-89782?
CVE-2026-89782 is a high vulnerability published on September 16, 2026. In the Linux kernel, the following vulnerability has been resolved: fs/ntfs3: reject restart table growth beyond U16_MAX entries During $LogFile replay, log_replay() indexes the transaction table by the transactid taken from the log record header. checklog_rec() only verifies that transact_id is…
When was CVE-2026-89782 disclosed?
CVE-2026-89782 was first published on September 16, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-89782 actively exploited?
CVE-2026-89782 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (7th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-89782?
CVE-2026-89782 has a CVSS base score of 8.4 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-89782?
No fix for CVE-2026-89782 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-89782 are linked in the Vendor Advisories panel on this page.

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