CVE-2026-64369

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 — 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:

s390: Revert support for DCACHE_WORD_ACCESS

load_unaligned_zeropad() reads eight bytes from unaligned addresses and may cross page boundaries. It handles exceptions which may happen if reading from the second page results in an exception.

For pages which are donated to the Ultravisor for secure execution purposes the do_secure_storage_access() exception handler however does not handle such exceptions correctly. Such an exception may result in an endless exception loop which will never be resolved.

An attempt to fix this [1] turned out to be not sufficient. For now revert load_unaligned_zeropad() until this problem has been resolved in a proper way.

Note that the implementation of load_unaligned_zeropad() itself is correct. The revert is just a temporary workaround until there is complete fix for secure storage access exceptions.

[1] commit b00be77302d7 ("s390/mm: Add missing secure storage access fixups for donated memory")

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
3%
KEV
Not listed

Published

July 25, 2026

Last Modified

September 8, 2026

Advisory Details (4)

Auto-updated Sep 8, 2026
No patch confirmed yet.
generic

s390: Revert support for DCACHE_WORD_ACCESS - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c9e0f1517631ac08987f8385817119bccf2f1f12
generic

s390: Revert support for DCACHE_WORD_ACCESS - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c94806905e02cc8e17a69c822d93c41743b7ffc5
generic

s390: Revert support for DCACHE_WORD_ACCESS - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/be79d285bea70d0edd5015bd487311bfa8cbebc9
generic

s390: Revert support for DCACHE_WORD_ACCESS - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/37540b8c287fc817bdbd0c62bb75ad6eab0e5d03

Vendor Advisories for CVE-2026-64369(1)

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-virtual-hwe-26.04-edge (7.0.0-31.31) @ resolute2026-09-20ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1013.13) @ resolute2026-09-20ubuntu
ubuntulinux-tools-gcp-edge (7.0.0-1011.11~24.04.1) @ noble2026-09-20ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1018.18~24.04.1) @ noble2026-09-20ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1019.19) @ resolute2026-09-20ubuntu

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
linux-6.12—6.12.100-1~deb12u1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.96-1 (31 versions)6.12.100-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.1~rc7-1~exp1 (158 versions)7.1.4-1—

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 / 52× 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. 2026-09-20 01:26 UTCEG score recompute
  2. 2026-09-20 01:26 UTCVendor advisory
  3. 2026-09-20 01:26 UTCGHSA enrichment
  4. 2026-09-18 19:28 UTCEPSS rescore
  5. 2026-09-18 02:47 UTCEG score recompute
  6. 2026-09-18 02:47 UTCVendor advisory
  7. 2026-09-18 02:47 UTCGHSA enrichment
  8. 2026-09-16 14:08 UTCEPSS rescore
  9. 2026-09-16 11:56 UTCEG score recompute
  10. 2026-09-16 11:56 UTCVendor advisory
  11. 2026-09-16 11:56 UTCGHSA enrichment
  12. 2026-09-16 05:15 UTCEPSS rescore
  13. 2026-09-15 09:24 UTCEG score recompute
  14. 2026-09-15 09:24 UTCVendor advisory
  15. 2026-09-15 09:24 UTCGHSA enrichment
  16. 2026-09-13 17:54 UTCEG score recompute
  17. 2026-09-13 17:54 UTCVendor advisory
  18. 2026-09-13 17:54 UTCGHSA enrichment
  19. 2026-09-12 17:08 UTCEG score recompute
  20. 2026-09-12 17:08 UTCVendor advisory
  21. 2026-09-12 17:08 UTCGHSA enrichment
  22. 2026-09-11 16:24 UTCEG score recompute
  23. 2026-09-11 16:24 UTCVendor advisory
  24. 2026-09-11 16:24 UTCGHSA enrichment
  25. 2026-09-11 14:53 UTCEPSS rescore
Show 72 more
  1. 2026-09-11 09:37 UTCEPSS rescore
  2. 2026-09-10 13:20 UTCEG score recompute
  3. 2026-09-10 13:20 UTCVendor advisory
  4. 2026-09-10 13:20 UTCGHSA enrichment
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-08 15:09 UTCEG score recompute▲ 5.50
  7. 2026-09-08 15:08 UTCGHSA enrichment
  8. 2026-09-08 15:06 UTCNVD updateCVSS v3 → 5.5 · severity → MEDIUM
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-05 15:31 UTCEPSS rescore
  12. 2026-09-05 06:04 UTCGHSA enrichment
  13. 2026-09-04 05:07 UTCEPSS rescore
  14. 2026-09-02 14:12 UTCEPSS rescore
  15. 2026-09-01 23:37 UTCGHSA enrichment
  16. 2026-09-01 13:54 UTCEPSS rescore
  17. 2026-09-01 04:40 UTCEPSS rescore
  18. 2026-08-30 19:17 UTCEPSS rescore
  19. 2026-08-30 01:22 UTCEPSS rescore
  20. 2026-08-30 00:08 UTCGHSA enrichment
  21. 2026-08-28 21:42 UTCEPSS rescore
  22. 2026-08-26 14:47 UTCEPSS rescore
  23. 2026-08-26 03:45 UTCGHSA enrichment
  24. 2026-08-25 13:49 UTCEPSS rescore
  25. 2026-08-23 04:17 UTCGHSA enrichment
  26. 2026-08-23 00:19 UTCEPSS rescore
  27. 2026-08-21 23:49 UTCEPSS rescore
  28. 2026-08-20 04:48 UTCGHSA enrichment
  29. 2026-08-19 17:04 UTCEPSS rescore
  30. 2026-08-18 13:48 UTCEPSS rescore
  31. 2026-08-17 13:47 UTCEPSS rescore
  32. 2026-08-17 05:25 UTCNVD update
  33. 2026-08-17 05:19 UTCGHSA enrichment
  34. 2026-08-17 05:05 UTCMITRE cvelistV5
  35. 2026-08-16 14:56 UTCEPSS rescore
  36. 2026-08-15 01:30 UTCEPSS rescore
  37. 2026-08-14 14:36 UTCGHSA enrichment
  38. 2026-08-13 22:00 UTCEPSS rescore
  39. 2026-08-12 13:51 UTCEPSS rescore
  40. 2026-08-11 15:07 UTCGHSA enrichment
  41. 2026-08-11 00:00 UTCEPSS rescore
  42. 2026-08-10 00:16 UTCGHSA enrichment
  43. 2026-08-09 13:47 UTCEPSS rescore
  44. 2026-08-08 16:37 UTCEPSS rescore
  45. 2026-08-07 00:47 UTCGHSA enrichment
  46. 2026-08-06 13:47 UTCEPSS rescore
  47. 2026-08-05 19:17 UTCEPSS rescore
  48. 2026-08-05 19:17 UTCEPSS rescore
  49. 2026-08-04 15:10 UTCEPSS rescore
  50. 2026-08-04 10:39 UTCEPSS rescore
  51. 2026-08-04 01:19 UTCGHSA enrichment
  52. 2026-08-03 10:36 UTCEPSS rescore
  53. 2026-08-02 02:27 UTCEPSS rescore
  54. 2026-08-01 04:16 UTCEPSS rescore
  55. 2026-08-01 01:50 UTCEG score recompute
  56. 2026-08-01 01:50 UTCGHSA enrichment
  57. 2026-07-30 16:28 UTCEPSS rescore
  58. 2026-07-30 01:30 UTCEPSS rescore
  59. 2026-07-30 01:30 UTCEPSS rescore
  60. 2026-07-29 02:19 UTCEG score recompute
  61. 2026-07-29 02:19 UTCGHSA enrichment
  62. 2026-07-28 15:37 UTCEPSS rescore
  63. 2026-07-27 14:14 UTCEPSS rescore
  64. 2026-07-26 14:54 UTCEPSS rescore
  65. 2026-07-26 14:54 UTCEPSS rescore
  66. 2026-07-26 02:49 UTCEG score recompute
  67. 2026-07-26 02:49 UTCGHSA enrichment
  68. 2026-07-25 14:18 UTCEPSS rescore
  69. 2026-07-25 14:18 UTCEPSS rescore
  70. 2026-07-25 10:39 UTCNVD update
  71. 2026-07-25 09:35 UTCEG score recompute
  72. 2026-07-25 09:21 UTCMITRE cvelistV5first tracked

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-64369?
CVE-2026-64369 is a medium vulnerability published on July 25, 2026. In the Linux kernel, the following vulnerability has been resolved: s390: Revert support for DCACHEWORDACCESS loadunalignedzeropad() reads eight bytes from unaligned addresses and may cross page boundaries. It handles exceptions which may happen if reading from the second page results in an…
When was CVE-2026-64369 disclosed?
CVE-2026-64369 was first published in the National Vulnerability Database on July 25, 2026, with the most recent update on September 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-64369 actively exploited?
CVE-2026-64369 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 97.0% of all scored CVEs.
What is the CVSS score of CVE-2026-64369?
CVE-2026-64369 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-64369?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-64369, 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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