CVE-2026-53238

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-06-25. NVD baseline CVSS 5.5; sources differ by 0.0.

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

netlabel: validate unlabeled address and mask attribute lengths

netlbl_unlabel_addrinfo_get() used the address attribute length to determine whether the attribute data could be read as an IPv4 or IPv6 address, but did not independently validate the corresponding mask attribute length. A crafted Generic Netlink request could therefore provide a valid IPv4/IPv6 address attribute with a shorter mask attribute, which would later be read as a full struct in_addr or struct in6_addr.

NLA_BINARY policy lengths are maximum lengths by default, so use NLA_POLICY_EXACT_LEN() for the unlabeled IPv4/IPv6 address and mask attributes. This rejects short attributes during policy validation and also exposes the exact length requirements through policy introspection.

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
6%
KEV
Not listed

Published

June 25, 2026

Last Modified

July 8, 2026

Advisory Details (8)

Auto-updated Jul 10, 2026
No patch confirmed yet.
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ccfe292a966079c61ea68a2da303b2a336170993
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9772589b57e44aedc240211c5c3f7a684a034d3a
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/975a84fd741440853380d37465b6e226cf47254c
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/95bda3eac0b1454c2cee98d58d9ba6dd8391e843
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/71c52da13c3737493b42d20d9f33de34e03b3156
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/672f0f3b8f875ffe6525a37847eafa7648c4c0c6
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c4bb32ad7fdc2dc6a8050f41eb04d4bda56b6c8
generic

netlabel: validate unlabeled address and mask attribute lengths - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/07a18f5c90dd3d586b73242f5a5bbf0a72f2fdc6

Vendor Advisories for CVE-2026-53238(2)

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

Affected Packages

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 5.10.92-2 (54 versions)5.10.259-1—
linux-6.16.1.106-3~deb11u1 ... 6.1.174-1~deb11u1 (20 versions)6.1.176-1~deb11u1—
Debian:12(1)
PackageVulnerable rangeFixed inDependents
linux6.1.106-1 ... 6.1.99-1 (53 versions)6.1.176-1—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
linux6.12.38-1 ... 6.12.94-1~bpo12+1 (27 versions)6.12.94-1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
linux6.12.100-1 ... 7.0.9-1~bpo13+1 (145 versions)7.0.13-1—

Data Freshness Timeline

(refreshed 4× in last 7d / 63× 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 193 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-53238?
CVE-2026-53238 is a medium vulnerability published on June 25, 2026. In the Linux kernel, the following vulnerability has been resolved: netlabel: validate unlabeled address and mask attribute lengths netlblunlabeladdrinfo_get() used the address attribute length to determine whether the attribute data could be read as an IPv4 or IPv6 address, but did not…
When was CVE-2026-53238 disclosed?
CVE-2026-53238 was first published in the National Vulnerability Database on June 25, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-53238 actively exploited?
CVE-2026-53238 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 94.2% of all scored CVEs.
What is the CVSS score of CVE-2026-53238?
CVE-2026-53238 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-53238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-53238, 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.

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