9.8

CVE-2026-52931: linux

CVSS: 9.8v3.1CriticalAnalyzed
AliasesUBUNTU-CVE-2026-52931DEBIAN-CVE-2026-52931
Published 24-06-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-52931 is a critical (CVSS 9.8) vulnerability in linux. EPSS estimates a 0.40% chance of exploitation in the next 30 days, higher than 32.6% of scored vulnerabilities.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.40%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 47 · Related 47
SUSE-SU-2026:23193-1SUSE-SU-2026:23194-1SUSE-SU-2026:23241-1SUSE-SU-2026:23244-1SUSE-SU-2026:3130-1SUSE-SU-2026:3166-1

Timeline

  1. 24-06-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

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 metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.40%

Chance of exploitation in the next 30 days

Percentile

33%

Versus all other CVEs

30-day change

0.00 pp

From 0.40% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.40%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Ubuntu166 products
  • linux< 4.15.0-254.266 | < 5.4.0-234.254 | < 5.15.0-186.196 | < 6.8.0-137.137 | All versions (No fix recorded) | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.15.0-1195.208 | < 5.4.0-1162.173 | < 5.15.0-1112.119 | < 6.8.0-1062.65 | All versions (No fix recorded) | < 7.0.0-1009.9
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 0e388af04b3958b178a1b979527f93eb46ea1fee | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 1a21c055f66e78973712a4a1be2a554f1ee2e4f4 | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 9884c9c02d3c90e9215db3c5128f59045d20ae91 | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 53f931e0146ae5bdab4cba302646827d06b3794b | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < dc2ae5fbd2dadc26735092f140b246841d969a11 | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 85397e48afe6be83ffca5ad3f4792296bfc81d3d | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 6c65cf23d4c6170fcf5714c32aa64689718cb142 | 4.8
  • linux_kernel≥ 4.8, < 5.10.258 | ≥ 5.11, < 5.15.209 | ≥ 5.16, < 6.1.175 | ≥ 6.2, < 6.6.142 | ≥ 6.7, < 6.12.92 | ≥ 6.13, < 6.18.34 | ≥ 6.19, < 7.0.11 | 7.1:rc1 | 7.1:rc2 | 7.1:rc3 | 7.1:rc4
Debian1 product
  • linux< 6.1.176-1 | < 6.12.94-1 | < 7.0.12-1

3 vendors · 169 products

References

54 links
Show all 54 references