CVE-2026-64146

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-07-19. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 4 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

A fix is available — apply it.

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

erofs: fix metabuf leak in inode xattr initialization

commit bb88e8da0025 ("erofs: use meta buffers for xattr operations") converted xattr operations to use on-stack erofs_buf instances. erofs_init_inode_xattrs() uses such a metabuf while reading the inline xattr header and shared xattr id array.

Some error paths after erofs_read_metabuf() leave through out_unlock without dropping the metabuf, so the folio reference can leak.

Consolidate the cleanup at out_unlock. erofs_put_metabuf() is a no-op if no folio has been acquired, and this keeps all paths after taking EROFS_I_BL_XATTR_BIT covered by a single cleanup site.

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
2%
KEV
Not listed

Published

July 19, 2026

Last Modified

August 17, 2026

Advisory Details (2)

Auto-updated Aug 17, 2026
No patch confirmed yet.
generic

erofs: fix metabuf leak in inode xattr initialization - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/79b09c54c6563df9846ca3094bcfd72082c3e1d7
generic

erofs: fix metabuf leak in inode xattr initialization - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/492c73b21fefa36f3869cb2b188ffb7fe37b3a9b

Vendor Advisories for CVE-2026-64146(2)

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 / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-09-18ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-18ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-09-18ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-09-18ubuntu

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

(3 across 3 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 7.2~rc7-1~exp1 (350 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc7-1~exp1 (174 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (141 versions)7.0.12-1—

Weakness Classification(1)

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

All Vendor Advisories

(6)

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 9× in last 7d / 61× 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.

Showing the most recent 100 of 133 total refreshes for this CVE.

  1. 2026-09-20 20:16 UTCEPSS rescore
  2. 2026-09-18 04:08 UTCEG score recompute
  3. 2026-09-18 04:08 UTCVendor advisory
  4. 2026-09-18 04:08 UTCGHSA enrichment
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 12:53 UTCEG score recompute
  7. 2026-09-16 12:53 UTCVendor advisory
  8. 2026-09-16 12:53 UTCGHSA enrichment
  9. 2026-09-16 05:15 UTCEPSS rescore
  10. 2026-09-13 23:15 UTCEG score recompute
  11. 2026-09-13 23:15 UTCVendor advisory
  12. 2026-09-13 23:15 UTCGHSA enrichment
  13. 2026-09-12 21:21 UTCEG score recompute
  14. 2026-09-12 21:21 UTCVendor advisory
  15. 2026-09-12 21:21 UTCGHSA enrichment
  16. 2026-09-11 18:40 UTCEG score recompute
  17. 2026-09-11 18:40 UTCVendor advisory
  18. 2026-09-11 18:40 UTCGHSA enrichment
  19. 2026-09-11 14:53 UTCEPSS rescore
  20. 2026-09-11 09:37 UTCEPSS rescore
  21. 2026-09-08 22:01 UTCEPSS rescore
  22. 2026-09-07 23:04 UTCEG score recompute
  23. 2026-09-07 23:04 UTCVendor advisory
  24. 2026-09-07 23:04 UTCGHSA enrichment
  25. 2026-09-07 16:01 UTCEPSS rescore
Show 75 more
  1. 2026-09-06 13:47 UTCEPSS rescore
  2. 2026-09-06 12:01 UTCEG score recompute
  3. 2026-09-06 12:01 UTCVendor advisory
  4. 2026-09-06 12:01 UTCGHSA enrichment
  5. 2026-09-05 15:31 UTCEPSS rescore
  6. 2026-09-05 09:47 UTCEG score recompute
  7. 2026-09-05 09:47 UTCVendor advisory
  8. 2026-09-05 09:47 UTCGHSA enrichment
  9. 2026-09-01 13:54 UTCEPSS rescore
  10. 2026-08-31 04:39 UTCVendor advisory
  11. 2026-08-31 04:39 UTCGHSA enrichment
  12. 2026-08-30 02:45 UTCEG score recompute
  13. 2026-08-30 02:45 UTCVendor advisory
  14. 2026-08-30 02:45 UTCGHSA enrichment
  15. 2026-08-30 01:22 UTCEPSS rescore
  16. 2026-08-28 21:42 UTCEPSS rescore
  17. 2026-08-27 13:44 UTCEG score recompute
  18. 2026-08-27 13:44 UTCVendor advisory
  19. 2026-08-27 13:44 UTCGHSA enrichment
  20. 2026-08-26 14:46 UTCEPSS rescore
  21. 2026-08-26 11:41 UTCEG score recompute
  22. 2026-08-26 11:41 UTCVendor advisory
  23. 2026-08-26 11:41 UTCGHSA enrichment
  24. 2026-08-25 13:49 UTCEPSS rescore
  25. 2026-08-25 09:39 UTCEG score recompute
  26. 2026-08-25 09:39 UTCVendor advisory
  27. 2026-08-25 09:39 UTCGHSA enrichment
  28. 2026-08-24 07:45 UTCVendor advisory
  29. 2026-08-24 07:45 UTCGHSA enrichment
  30. 2026-08-23 05:25 UTCEG score recompute
  31. 2026-08-23 05:25 UTCVendor advisory
  32. 2026-08-23 05:25 UTCGHSA enrichment
  33. 2026-08-23 00:19 UTCEPSS rescore
  34. 2026-08-22 03:31 UTCEG score recompute
  35. 2026-08-22 03:31 UTCVendor advisory
  36. 2026-08-22 03:31 UTCGHSA enrichment
  37. 2026-08-21 23:49 UTCEPSS rescore
  38. 2026-08-21 01:36 UTCEG score recompute
  39. 2026-08-21 01:36 UTCVendor advisory
  40. 2026-08-21 01:36 UTCGHSA enrichment
  41. 2026-08-20 22:55 UTCEPSS rescore
  42. 2026-08-19 23:43 UTCEG score recompute
  43. 2026-08-19 23:43 UTCVendor advisory
  44. 2026-08-19 23:43 UTCGHSA enrichment
  45. 2026-08-19 17:04 UTCEPSS rescore
  46. 2026-08-18 21:49 UTCEG score recompute
  47. 2026-08-18 21:49 UTCVendor advisory
  48. 2026-08-18 21:49 UTCGHSA enrichment
  49. 2026-08-18 13:48 UTCEPSS rescore
  50. 2026-08-17 19:48 UTCEG score recompute▲ 5.50
  51. 2026-08-17 19:48 UTCVendor advisory
  52. 2026-08-17 19:48 UTCGHSA enrichment
  53. 2026-08-17 19:47 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  54. 2026-08-17 13:47 UTCEPSS rescore
  55. 2026-08-16 14:56 UTCEPSS rescore
  56. 2026-08-15 13:40 UTCVendor advisory
  57. 2026-08-15 13:40 UTCGHSA enrichment
  58. 2026-08-15 01:30 UTCEPSS rescore
  59. 2026-08-13 22:00 UTCEPSS rescore
  60. 2026-08-12 13:51 UTCEPSS rescore
  61. 2026-08-12 09:12 UTCVendor advisory
  62. 2026-08-12 09:11 UTCGHSA enrichment
  63. 2026-08-11 00:00 UTCEPSS rescore
  64. 2026-08-09 13:47 UTCEPSS rescore
  65. 2026-08-09 04:43 UTCVendor advisory
  66. 2026-08-09 04:43 UTCGHSA enrichment
  67. 2026-08-06 13:47 UTCEPSS rescore
  68. 2026-08-06 00:15 UTCVendor advisory
  69. 2026-08-06 00:15 UTCGHSA enrichment
  70. 2026-08-05 19:17 UTCEPSS rescore
  71. 2026-08-05 19:17 UTCEPSS rescore
  72. 2026-08-04 15:10 UTCEPSS rescore
  73. 2026-08-04 10:39 UTCEPSS rescore
  74. 2026-08-03 10:36 UTCEPSS rescore
  75. 2026-08-02 19:48 UTCVendor advisory

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-64146?
CVE-2026-64146 is a medium vulnerability published on July 19, 2026. In the Linux kernel, the following vulnerability has been resolved: erofs: fix metabuf leak in inode xattr initialization commit bb88e8da0025 ("erofs: use meta buffers for xattr operations") converted xattr operations to use on-stack erofs_buf instances. erofsinitinode_xattrs() uses such a metabuf…
When was CVE-2026-64146 disclosed?
CVE-2026-64146 was first published in the National Vulnerability Database on July 19, 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-2026-64146 actively exploited?
CVE-2026-64146 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 98.4% of all scored CVEs.
What is the CVSS score of CVE-2026-64146?
CVE-2026-64146 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64146?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64146, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-64146

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