CVE-2026-52931

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-24. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 4 sources updated this week
9.8
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.8Exploit: 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:

batman-adv: tp_meter: avoid use of uninit sender vars

batadv_tp_recv_ack() and batadv_tp_stop() are only valid for tp_vars in the BATADV_TP_SENDER role. When called with a BATADV_TP_RECEIVER role, it proceeds to read sender-only members that were never initialized, leading to undefined behavior.

This can be triggered when a node that is currently acting as a receiver in an ongoing tp_meter session receives a malicious ACK packet.

Guard against this by checking tp_vars->role immediately after the lookup and bailing out if it is not BATADV_TP_SENDER, before any of those members are accessed.

CVSS v3
9.8
EG Score
9.8(high)
EPSS
32.4%
KEV
Not listed

Published

June 24, 2026

Last Modified

June 28, 2026

Advisory Details (8)

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

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/ecdaa3e4d91040206afe21bc8a0d1198a0971ff3
generic

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/dc2ae5fbd2dadc26735092f140b246841d969a11
generic

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/9884c9c02d3c90e9215db3c5128f59045d20ae91
generic

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/85397e48afe6be83ffca5ad3f4792296bfc81d3d
generic

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/6c65cf23d4c6170fcf5714c32aa64689718cb142
generic

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/53f931e0146ae5bdab4cba302646827d06b3794b
generic

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/1a21c055f66e78973712a4a1be2a554f1ee2e4f4
generic

batman-adv: tp_meter: avoid use of uninit sender vars - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0e388af04b3958b178a1b979527f93eb46ea1fee

Vendor Advisories for CVE-2026-52931(2)

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

Data Freshness Timeline

(refreshed 131× in last 7d / 150× 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 150 total refreshes for this CVE.

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

Related CVEs(same vendor)

Frequently asked(5)

What is CVE-2026-52931?
CVE-2026-52931 is a critical vulnerability published on June 24, 2026. In the Linux kernel, the following vulnerability has been resolved: batman-adv: tp_meter: avoid use of uninit sender vars batadvtprecvack() and batadvtpstop() are only valid for tpvars in the BATADVTPSENDER role. When called with a BATADVTPRECEIVER role, it proceeds to read sender-only members that…
When was CVE-2026-52931 disclosed?
CVE-2026-52931 was first published in the National Vulnerability Database on June 24, 2026, with the most recent update on June 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-52931 actively exploited?
CVE-2026-52931 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 32.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-52931?
CVE-2026-52931 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-52931?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-52931, 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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