CVE-2026-64256

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-25. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

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

xfs: don't wrap around quota ids in dqiterate

LOLLM noticed that q_id is an unsigned 32-bit variable. If it happens to be set to XFS_DQ_ID_MAX due to a filesystem that actually has a dquot for ID_MAX, then this addition will truncate to zero and the iteration starts over. Fix this by casting to u64.

CVSS v3
5.5
EG Score
5.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

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%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
5%
KEV
Not listed

Published

July 25, 2026

Last Modified

August 17, 2026

Advisory Details (4)

Auto-updated Aug 12, 2026
No patch confirmed yet.
generic

xfs: don't wrap around quota ids in dqiterate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d766e4e5e85d829629c3ba503802fe1303d7b591
generic

xfs: don't wrap around quota ids in dqiterate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/d1c4c40599c376aeb0c93068a2ae344e79ee4b90
generic

xfs: don't wrap around quota ids in dqiterate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/2b14fe1e0924c6b901f4256456342569c5397abe
generic

xfs: don't wrap around quota ids in dqiterate - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/249e311c2ba392ceaf9ebfc145a46922946f069a

Vendor Advisories for CVE-2026-64256(1)

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

Affected Packages

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux-6.12—6.12.100-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.95-1~bpo12+1 (30 versions)6.12.96-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (156 versions)7.1.4-1—

Data Freshness Timeline

(refreshed 15× in last 7d / 62× 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. 2026-08-30 01:22 UTCEPSS rescore
  2. 2026-08-30 00:14 UTCEG score recompute
  3. 2026-08-30 00:14 UTCGHSA enrichment
  4. 2026-08-28 21:42 UTCEPSS rescore
  5. 2026-08-27 11:12 UTCEG score recompute
  6. 2026-08-27 11:12 UTCGHSA enrichment
  7. 2026-08-26 14:47 UTCEPSS rescore
  8. 2026-08-26 10:39 UTCEG score recompute
  9. 2026-08-26 10:39 UTCGHSA enrichment
  10. 2026-08-25 13:49 UTCEPSS rescore
  11. 2026-08-25 09:41 UTCEG score recompute
  12. 2026-08-25 09:41 UTCGHSA enrichment
  13. 2026-08-24 09:09 UTCGHSA enrichment
  14. 2026-08-23 08:37 UTCEG score recompute
  15. 2026-08-23 08:37 UTCGHSA enrichment
  16. 2026-08-23 00:19 UTCEPSS rescore
  17. 2026-08-22 08:05 UTCEG score recompute
  18. 2026-08-22 08:05 UTCGHSA enrichment
  19. 2026-08-21 23:49 UTCEPSS rescore
  20. 2026-08-21 07:33 UTCEG score recompute
  21. 2026-08-21 07:33 UTCGHSA enrichment
  22. 2026-08-20 22:55 UTCEPSS rescore
  23. 2026-08-20 07:00 UTCEG score recompute
  24. 2026-08-20 07:00 UTCGHSA enrichment
  25. 2026-08-19 17:04 UTCEPSS rescore
Show 55 more
  1. 2026-08-19 06:28 UTCEG score recompute
  2. 2026-08-19 06:28 UTCGHSA enrichment
  3. 2026-08-18 13:48 UTCEPSS rescore
  4. 2026-08-18 05:54 UTCEG score recompute
  5. 2026-08-18 05:54 UTCGHSA enrichment
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 05:22 UTCGHSA enrichment
  8. 2026-08-16 18:27 UTCEG score recompute
  9. 2026-08-16 18:27 UTCGHSA enrichment
  10. 2026-08-16 14:56 UTCEPSS rescore
  11. 2026-08-15 17:55 UTCEG score recompute
  12. 2026-08-15 17:55 UTCGHSA enrichment
  13. 2026-08-15 01:30 UTCEPSS rescore
  14. 2026-08-14 17:23 UTCEG score recompute
  15. 2026-08-14 17:23 UTCGHSA enrichment
  16. 2026-08-13 22:00 UTCEPSS rescore
  17. 2026-08-13 16:43 UTCEG score recompute
  18. 2026-08-13 16:43 UTCGHSA enrichment
  19. 2026-08-12 15:55 UTCEG score recompute▲ 5.50
  20. 2026-08-12 15:55 UTCGHSA enrichment
  21. 2026-08-12 15:55 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  22. 2026-08-12 13:51 UTCEPSS rescore
  23. 2026-08-12 12:16 UTCGHSA enrichment
  24. 2026-08-11 00:00 UTCEPSS rescore
  25. 2026-08-09 13:47 UTCEPSS rescore
  26. 2026-08-09 06:58 UTCGHSA enrichment
  27. 2026-08-08 16:37 UTCEPSS rescore
  28. 2026-08-06 13:47 UTCEPSS rescore
  29. 2026-08-06 01:44 UTCGHSA enrichment
  30. 2026-08-05 19:17 UTCEPSS rescore
  31. 2026-08-05 19:17 UTCEPSS rescore
  32. 2026-08-04 15:10 UTCEPSS rescore
  33. 2026-08-04 10:39 UTCEPSS rescore
  34. 2026-08-03 10:36 UTCEPSS rescore
  35. 2026-08-02 20:30 UTCGHSA enrichment
  36. 2026-08-02 02:27 UTCEPSS rescore
  37. 2026-08-01 04:16 UTCEPSS rescore
  38. 2026-07-30 16:28 UTCEPSS rescore
  39. 2026-07-30 15:16 UTCEG score recompute
  40. 2026-07-30 15:16 UTCGHSA enrichment
  41. 2026-07-30 01:30 UTCEPSS rescore
  42. 2026-07-30 01:30 UTCEPSS rescore
  43. 2026-07-29 08:09 UTCEG score recompute
  44. 2026-07-29 08:09 UTCGHSA enrichment
  45. 2026-07-28 15:37 UTCEPSS rescore
  46. 2026-07-27 14:14 UTCEPSS rescore
  47. 2026-07-26 14:54 UTCEPSS rescore
  48. 2026-07-26 14:54 UTCEPSS rescore
  49. 2026-07-26 02:54 UTCEG score recompute
  50. 2026-07-26 02:54 UTCGHSA enrichment
  51. 2026-07-25 14:18 UTCEPSS rescore
  52. 2026-07-25 14:18 UTCEPSS rescore
  53. 2026-07-25 10:39 UTCNVD update
  54. 2026-07-25 09:43 UTCEG score recompute
  55. 2026-07-25 09:21 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-64256?
CVE-2026-64256 is a medium vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: xfs: don't wrap around quota ids in dqiterate LOLLM noticed that q_id is an unsigned 32-bit variable. If it happens to be set to XFSDQID_MAX due to a filesystem that actually has a dquot for ID_MAX, then this addition will truncate…
When was CVE-2026-64256 disclosed?
CVE-2026-64256 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on August 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64256 actively exploited?
CVE-2026-64256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 94.6% of all scored CVEs.
What is the CVSS score of CVE-2026-64256?
CVE-2026-64256 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64256, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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