CVE-2026-52981

HIGHPre-NVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-06-24. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 7.5Exploit: None knownExposed: 0

A fix is available — apply it.

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

neigh: let neigh_xmit take skb ownership

neigh_xmit always releases the skb, except when no neighbour table is found. But even the first added user of neigh_xmit (mpls) relied on neigh_xmit to release the skb (or queue it for tx).

sashiko reported: If neigh_xmit() is called with an uninitialized neighbor table (for example, NEIGH_ND_TABLE when IPv6 is disabled), it returns -EAFNOSUPPORT and bypasses its internal out_kfree_skb error path. Because the return value of neigh_xmit() is ignored here, does this leak the SKB?

Assume full ownership and remove the last code path that doesn't xmit or free skb.

CVSS v3
7.5
EG Score
7.5(medium)
EG Risk
38(Track)
EG Risk 38/100SSVC: 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
Severity75% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
43%
KEV
Not listed

Published

June 24, 2026

Last Modified

August 5, 2026

Advisory Details (6)

Auto-updated Jun 28, 2026
No patch confirmed yet.
generic

neigh: let neigh_xmit take skb ownership - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9247d59ca15bf60a57dca08103f055d8a4340877
generic

neigh: let neigh_xmit take skb ownership - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/8a89054a1ec0767aec25ed2bbac933da6ba3cf5a
generic

neigh: let neigh_xmit take skb ownership - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/63063ba60d2dc334e34f1e3f9271d7f3f6f30307
generic

neigh: let neigh_xmit take skb ownership - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/445e45a2c3a078316a62d2d331a570cf34ef5079
generic

neigh: let neigh_xmit take skb ownership - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/4438113be604ee67a7bf4f81da6e1cca41332ce4
generic

neigh: let neigh_xmit take skb ownership - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0084712e0bee204b284510cdb63182fd5a30c2b7

Vendor Advisories for CVE-2026-52981(2)

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

Patch Availability(22)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-08-30ubuntu
ubuntulinux-tools-oem-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-08-30ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-30ubuntu
ubuntulinux-tools-oracle-lts-24.04 (6.8.0-1058.61) @ noble2026-08-30ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-30ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-08-30ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-08-30ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2050.52) @ noble2026-08-30ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-30ubuntu
ubuntulinux-tools-ibm-edge (6.8.0-1061.62~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-136.136~22.04.1) @ jammy2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-30ubuntu
ubuntulinux-tools-aws-fips-6.8 (6.8.0-1061.64+fips1) @ noble2026-08-30ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ 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

(5 across 4 ecosystems)
Debian:11(2)
PackageVulnerable rangeFixed inDependents
linux5.10.103-1 ... 7.2~rc5-1~exp1 (496 versions)——
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 (140 versions)7.0.10-1—

Weakness Classification(1)

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

Additional Vendor Advisories

(22)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 5× in last 7d / 87× 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 288 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-52981?
CVE-2026-52981 is a high vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: neigh: let neigh_xmit take skb ownership neigh_xmit always releases the skb, except when no neighbour table is found. But even the first added user of neigh_xmit (mpls) relied on neigh_xmit to release the skb (or queue it for tx).…
When was CVE-2026-52981 disclosed?
CVE-2026-52981 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on August 5, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52981 actively exploited?
CVE-2026-52981 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 56.7% of all scored CVEs.
What is the CVSS score of CVE-2026-52981?
CVE-2026-52981 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-52981?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52981, 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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