CVE-2026-45848

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-05-27. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 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:

apparmor: fix NULL sock in aa_sock_file_perm

Deal with the potential that sock and sock-sk can be NULL during socket setup or teardown. This could lead to an oops. The fix for NULL pointer dereference in __unix_needs_revalidation shows this is at least possible for af_unix sockets. While the fix for af_unix sockets applies for newer mediation this is still the fall back path for older af_unix mediation and other sockets, so ensure it is covered.

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
5.6%
KEV
Not listed

Published

May 27, 2026

Last Modified

June 25, 2026

Advisory Details (8)

Auto-updated Jun 25, 2026
No patch confirmed yet.
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ccb66a3c6c8f51b3ed1bc003b70bb9ff99e8d835
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c11b7c3280d000376e27ebfed17ec7046699eab4
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8a0ededbfcff74598f82f1d4b8ef9db28878b317
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/68538ec34fcb4194c7961dc4eca6f5537fec8067
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/5121b7283f1c46e4c06b88b1dda7b064429d77de
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/3852eb9a0392eb435c03dcb47d581bcfe6a9a95b
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0dc19bca22606f7a61d5988408f74e3ae0ef3486
generic

apparmor: fix NULL sock in aa_sock_file_perm - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/00b67657535dfea56e84d11492f5c0f61d0af297

Vendor Advisories for CVE-2026-45848(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-45848?
CVE-2026-45848 is a medium vulnerability published on May 27, 2026. In the Linux kernel, the following vulnerability has been resolved: apparmor: fix NULL sock in aasockfile_perm Deal with the potential that sock and sock-sk can be NULL during socket setup or teardown. This could lead to an oops. The fix for NULL pointer dereference in unixneedsrevalidation shows…
When was CVE-2026-45848 disclosed?
CVE-2026-45848 was first published in the National Vulnerability Database on May 27, 2026, with the most recent update on June 25, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-45848 actively exploited?
CVE-2026-45848 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-45848?
CVE-2026-45848 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-45848?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-45848, 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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