CVE-2026-52931

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-24. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:linux, epss, ghsa
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.8Exploit: None knownExposed: 0

A fix is available — apply it.

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(medium)
EG Risk
49(Track)
EG Risk 49/100SSVC: 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
Severity98% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

June 24, 2026

Last Modified

August 5, 2026

Advisory Details (8)

Auto-updated Sep 9, 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/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/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/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/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/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/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/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.

Patch Availability(30)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-virtual-hwe-26.04-edge (7.0.0-28.28) @ resolute2026-08-31ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-08-31ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-08-31ubuntu
ubuntulinux-tools-azure-fde-7.0 (7.0.0-1009.9) @ resolute2026-08-31ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-08-31ubuntu
ubuntulinux-tools-raspi-realtime-7.0 (7.0.0-1015.15) @ resolute2026-08-31ubuntu
ubuntulinux-tools-oracle-edge (5.15.0.1109.115~20.04.1) @ focal2026-08-31ubuntu
ubuntulinux-tools-azure-fips-5.15 (5.15.0.1117.102) @ jammy2026-08-31ubuntu
ubuntulinux-tools-intel-iotg-edge (5.15.0.1107.113~20.04.1) @ focal2026-08-31ubuntu
ubuntulinux-tools-intel-iotg-5.15 (5.15.0.1107.106) @ jammy2026-08-31ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.254.238) @ bionic2026-08-31ubuntu
ubuntulinux-xilinx-zynqmp (6.8.0.1034.35) @ noble2026-08-31ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-137.137.1~22.04.1) @ jammy2026-08-31ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.4.0-1080 (5.4.0-1080.84) @ focal2026-08-31ubuntu
ubuntulinux-virtual-hwe-16.04-edge (4.15.0.254.266~16.04.1) @ xenial2026-08-31ubuntu
ubuntulinux-tools-oracle (4.15.0.1158.169~16.04.1) @ xenial2026-08-31ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1059.62~22.04.1) @ jammy2026-08-31ubuntu
ubuntulinux-virtual-hwe-22.04-edge (6.8.0-138.138~22.04.1) @ jammy2026-08-31ubuntu
ubuntulinux-virtual-hwe-24.04-edge (7.0.0-28.28~24.04.1) @ noble2026-08-31ubuntu
ubuntulinux-tools-oracle-7.0 (7.0.0-1008.8) @ resolute2026-08-31ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1112.119~20.04.1) @ focal2026-08-31ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-08-31ubuntu
ubuntulinux-tools-kvm-5.4 (5.4.0.1149.145) @ focal2026-08-31ubuntu
ubuntulinux-tools-azure (4.15.0.1205.220~14.04.1) @ trusty2026-08-31ubuntu
ubuntulinux-tools-aws-edge (6.8.0-1062.65~22.04.2) @ jammy2026-08-31ubuntu
ubuntulinux-tools-gcp-edge (5.15.0.1112.122~20.04.1) @ focal2026-08-31ubuntu
ubuntulinux-tools-nvidia-hwe-24.04-edge (7.0.0-1016.16) @ resolute2026-08-31ubuntu
ubuntulinux-tools-nvidia-hwe-26.04 (7.0.0-2016.16) @ resolute2026-08-31ubuntu
ubuntulinux-tools-raspi-realtime-6.8 (6.8.0-2051.53) @ noble2026-08-31ubuntu
ubuntulinux-tools-azure-fips-5.4 (5.4.0.1167.103) @ focal2026-08-31ubuntu

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 ... 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 (141 versions)7.0.12-1—

Additional Vendor Advisories

(24)

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 / 153× 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 616 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. 2026-08-31 00:25 UTCVendor advisory
  11. 2026-08-31 00:25 UTCGHSA enrichment
  12. 2026-08-30 20:22 UTCEG score recompute
  13. 2026-08-30 20:22 UTCVendor advisory
  14. 2026-08-30 20:22 UTCGHSA enrichment
  15. 2026-08-30 19:17 UTCEPSS rescore
  16. 2026-08-30 01:22 UTCEPSS rescore
  17. 2026-08-28 21:41 UTCEPSS rescore
  18. 2026-08-28 04:54 UTCEG score recompute
  19. 2026-08-28 04:54 UTCVendor advisory
  20. 2026-08-28 04:53 UTCGHSA enrichment
  21. 2026-08-27 14:25 UTCEPSS rescore
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-25 13:49 UTCEPSS rescore
  24. 2026-08-25 06:15 UTCVendor advisory
  25. 2026-08-25 06:14 UTCGHSA enrichment
Show 75 more
  1. 2026-08-25 02:06 UTCVendor advisory
  2. 2026-08-25 02:06 UTCGHSA enrichment
  3. 2026-08-24 22:03 UTCEG score recompute
  4. 2026-08-24 22:03 UTCVendor advisory
  5. 2026-08-24 22:03 UTCGHSA enrichment
  6. 2026-08-24 13:50 UTCEG score recompute
  7. 2026-08-24 13:50 UTCVendor advisory
  8. 2026-08-24 13:50 UTCGHSA enrichment
  9. 2026-08-24 04:41 UTCVendor advisory
  10. 2026-08-24 04:40 UTCGHSA enrichment
  11. 2026-08-24 00:11 UTCVendor advisory
  12. 2026-08-24 00:10 UTCGHSA enrichment
  13. 2026-08-23 20:05 UTCVendor advisory
  14. 2026-08-23 20:04 UTCGHSA enrichment
  15. 2026-08-23 15:59 UTCVendor advisory
  16. 2026-08-23 15:59 UTCGHSA enrichment
  17. 2026-08-23 11:56 UTCVendor advisory
  18. 2026-08-23 11:56 UTCGHSA enrichment
  19. 2026-08-23 07:52 UTCVendor advisory
  20. 2026-08-23 07:52 UTCGHSA enrichment
  21. 2026-08-23 02:48 UTCEG score recompute
  22. 2026-08-23 02:48 UTCVendor advisory
  23. 2026-08-23 02:47 UTCGHSA enrichment
  24. 2026-08-23 00:19 UTCEPSS rescore
  25. 2026-08-22 22:43 UTCVendor advisory
  26. 2026-08-22 22:42 UTCGHSA enrichment
  27. 2026-08-22 13:21 UTCEG score recompute
  28. 2026-08-22 13:21 UTCVendor advisory
  29. 2026-08-22 13:20 UTCGHSA enrichment
  30. 2026-08-21 23:49 UTCEPSS rescore
  31. 2026-08-21 22:20 UTCVendor advisory
  32. 2026-08-21 22:19 UTCGHSA enrichment
  33. 2026-08-21 18:17 UTCVendor advisory
  34. 2026-08-21 18:16 UTCGHSA enrichment
  35. 2026-08-21 14:13 UTCVendor advisory
  36. 2026-08-21 14:12 UTCGHSA enrichment
  37. 2026-08-21 09:25 UTCVendor advisory
  38. 2026-08-21 09:24 UTCGHSA enrichment
  39. 2026-08-21 05:21 UTCVendor advisory
  40. 2026-08-21 05:21 UTCGHSA enrichment
  41. 2026-08-21 00:33 UTCEG score recompute
  42. 2026-08-21 00:33 UTCVendor advisory
  43. 2026-08-21 00:32 UTCGHSA enrichment
  44. 2026-08-20 22:55 UTCEPSS rescore
  45. 2026-08-20 20:29 UTCVendor advisory
  46. 2026-08-20 20:29 UTCGHSA enrichment
  47. 2026-08-20 16:26 UTCVendor advisory
  48. 2026-08-20 16:25 UTCGHSA enrichment
  49. 2026-08-20 12:22 UTCVendor advisory
  50. 2026-08-20 12:22 UTCGHSA enrichment
  51. 2026-08-20 07:37 UTCEG score recompute
  52. 2026-08-20 07:37 UTCVendor advisory
  53. 2026-08-20 07:37 UTCGHSA enrichment
  54. 2026-08-19 17:04 UTCEPSS rescore
  55. 2026-08-19 12:43 UTCVendor advisory
  56. 2026-08-19 12:42 UTCGHSA enrichment
  57. 2026-08-19 06:59 UTCVendor advisory
  58. 2026-08-19 06:58 UTCGHSA enrichment
  59. 2026-08-19 02:23 UTCEG score recompute
  60. 2026-08-19 02:23 UTCVendor advisory
  61. 2026-08-19 02:22 UTCGHSA enrichment
  62. 2026-08-18 13:48 UTCEPSS rescore
  63. 2026-08-17 14:45 UTCEG score recompute
  64. 2026-08-17 14:45 UTCVendor advisory
  65. 2026-08-17 14:45 UTCGHSA enrichment
  66. 2026-08-17 13:47 UTCEPSS rescore
  67. 2026-08-17 10:42 UTCVendor advisory
  68. 2026-08-17 10:42 UTCGHSA enrichment
  69. 2026-08-17 06:39 UTCVendor advisory
  70. 2026-08-17 06:39 UTCGHSA enrichment
  71. 2026-08-17 02:37 UTCVendor advisory
  72. 2026-08-17 02:37 UTCGHSA enrichment
  73. 2026-08-16 22:34 UTCVendor advisory
  74. 2026-08-16 22:34 UTCGHSA enrichment
  75. 2026-08-16 18:31 UTCEG score recompute

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 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-2026-52931 actively exploited?
CVE-2026-52931 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 66.6% of all scored CVEs.
What is the CVSS score of CVE-2026-52931?
CVE-2026-52931 has a CVSS v4.0 base score of 9.8 (CNA self-assessment; NVD's own analysis pending).
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.

Dependency Blast Radius

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