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(5)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu

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~rc5-1~exp1 (335 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.2~rc5-1~exp1 (160 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (138 versions)7.0.12-1—

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 18× in last 7d / 67× 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 02:45 UTCEG score recompute
  2. 2026-08-30 02:45 UTCVendor advisory
  3. 2026-08-30 02:45 UTCGHSA enrichment
  4. 2026-08-30 01:22 UTCEPSS rescore
  5. 2026-08-28 21:42 UTCEPSS rescore
  6. 2026-08-27 13:44 UTCEG score recompute
  7. 2026-08-27 13:44 UTCVendor advisory
  8. 2026-08-27 13:44 UTCGHSA enrichment
  9. 2026-08-26 14:46 UTCEPSS rescore
  10. 2026-08-26 11:41 UTCEG score recompute
  11. 2026-08-26 11:41 UTCVendor advisory
  12. 2026-08-26 11:41 UTCGHSA enrichment
  13. 2026-08-25 13:49 UTCEPSS rescore
  14. 2026-08-25 09:39 UTCEG score recompute
  15. 2026-08-25 09:39 UTCVendor advisory
  16. 2026-08-25 09:39 UTCGHSA enrichment
  17. 2026-08-24 07:45 UTCVendor advisory
  18. 2026-08-24 07:45 UTCGHSA enrichment
  19. 2026-08-23 05:25 UTCEG score recompute
  20. 2026-08-23 05:25 UTCVendor advisory
  21. 2026-08-23 05:25 UTCGHSA enrichment
  22. 2026-08-23 00:19 UTCEPSS rescore
  23. 2026-08-22 03:31 UTCEG score recompute
  24. 2026-08-22 03:31 UTCVendor advisory
  25. 2026-08-22 03:31 UTCGHSA enrichment
Show 72 more
  1. 2026-08-21 23:49 UTCEPSS rescore
  2. 2026-08-21 01:36 UTCEG score recompute
  3. 2026-08-21 01:36 UTCVendor advisory
  4. 2026-08-21 01:36 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-19 23:43 UTCEG score recompute
  7. 2026-08-19 23:43 UTCVendor advisory
  8. 2026-08-19 23:43 UTCGHSA enrichment
  9. 2026-08-19 17:04 UTCEPSS rescore
  10. 2026-08-18 21:49 UTCEG score recompute
  11. 2026-08-18 21:49 UTCVendor advisory
  12. 2026-08-18 21:49 UTCGHSA enrichment
  13. 2026-08-18 13:48 UTCEPSS rescore
  14. 2026-08-17 19:48 UTCEG score recompute▲ 5.50
  15. 2026-08-17 19:48 UTCVendor advisory
  16. 2026-08-17 19:48 UTCGHSA enrichment
  17. 2026-08-17 19:47 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  18. 2026-08-17 13:47 UTCEPSS rescore
  19. 2026-08-16 14:56 UTCEPSS rescore
  20. 2026-08-15 13:40 UTCVendor advisory
  21. 2026-08-15 13:40 UTCGHSA enrichment
  22. 2026-08-15 01:30 UTCEPSS rescore
  23. 2026-08-13 22:00 UTCEPSS rescore
  24. 2026-08-12 13:51 UTCEPSS rescore
  25. 2026-08-12 09:12 UTCVendor advisory
  26. 2026-08-12 09:11 UTCGHSA enrichment
  27. 2026-08-11 00:00 UTCEPSS rescore
  28. 2026-08-09 13:47 UTCEPSS rescore
  29. 2026-08-09 04:43 UTCVendor advisory
  30. 2026-08-09 04:43 UTCGHSA enrichment
  31. 2026-08-06 13:47 UTCEPSS rescore
  32. 2026-08-06 00:15 UTCVendor advisory
  33. 2026-08-06 00:15 UTCGHSA enrichment
  34. 2026-08-05 19:17 UTCEPSS rescore
  35. 2026-08-05 19:17 UTCEPSS rescore
  36. 2026-08-04 15:10 UTCEPSS rescore
  37. 2026-08-04 10:39 UTCEPSS rescore
  38. 2026-08-03 10:36 UTCEPSS rescore
  39. 2026-08-02 19:48 UTCVendor advisory
  40. 2026-08-02 19:48 UTCGHSA enrichment
  41. 2026-08-02 02:27 UTCEPSS rescore
  42. 2026-08-01 04:16 UTCEPSS rescore
  43. 2026-07-30 16:28 UTCEPSS rescore
  44. 2026-07-30 15:21 UTCEG score recompute
  45. 2026-07-30 15:20 UTCGHSA enrichment
  46. 2026-07-30 01:30 UTCEPSS rescore
  47. 2026-07-30 01:30 UTCEPSS rescore
  48. 2026-07-29 15:19 UTCGHSA enrichment
  49. 2026-07-28 15:37 UTCEPSS rescore
  50. 2026-07-27 14:14 UTCEPSS rescore
  51. 2026-07-26 14:54 UTCEPSS rescore
  52. 2026-07-26 14:54 UTCEPSS rescore
  53. 2026-07-26 10:52 UTCEG score recompute
  54. 2026-07-26 10:52 UTCVendor advisory
  55. 2026-07-26 10:52 UTCGHSA enrichment
  56. 2026-07-25 14:18 UTCEPSS rescore
  57. 2026-07-25 14:18 UTCEPSS rescore
  58. 2026-07-24 14:18 UTCEPSS rescore
  59. 2026-07-24 14:18 UTCEPSS rescore
  60. 2026-07-23 14:18 UTCEPSS rescore
  61. 2026-07-23 14:18 UTCEPSS rescore
  62. 2026-07-23 03:22 UTCEG score recompute
  63. 2026-07-22 14:08 UTCEPSS rescore
  64. 2026-07-22 14:08 UTCEPSS rescore
  65. 2026-07-21 15:25 UTCEPSS rescore
  66. 2026-07-21 15:25 UTCEPSS rescore
  67. 2026-07-20 17:18 UTCEG score recompute
  68. 2026-07-20 17:18 UTCGHSA enrichment
  69. 2026-07-20 17:08 UTCEPSS rescore
  70. 2026-07-19 17:49 UTCNVD update
  71. 2026-07-19 16:07 UTCEG score recompute
  72. 2026-07-19 16:03 UTCMITRE cvelistV5first tracked

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 98.5% 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

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