7.8

CVE-2026-52919: linux Integer Underflow (Wrap or Wraparound)

CVSS: 7.8v3.1HighAnalyzed
AliasesUBUNTU-CVE-2026-52919DEBIAN-CVE-2026-52919
Published 24-06-2026Last modified 05-08-2026
Open JSON

Vulnerability summary

CVE-2026-52919 is a high (CVSS 7.8) Integer Underflow (Wrap or Wraparound) vulnerability in linux. EPSS estimates a 0.12% chance of exploitation in the next 30 days, higher than 1.5% of scored vulnerabilities.

Overall risk
31/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.12%
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 46 · Related 46
OPENSUSE-SU-2026:21388-1SUSE-SU-2026:22742-1SUSE-SU-2026:22769-1SUSE-SU-2026:22812-1SUSE-SU-2026:22835-1SUSE-SU-2026:23193-1

Timeline

  1. 24-06-2026
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix tp_meter counter underflow during shutdown batadv_tp_sender_shutdown() unconditionally decrements the "sending" atomic counter. If multiple paths (e.g. timeout, user cancel, and normal finish) call this function, the counter can underflow to -1. Since the sender logic treats any non-zero value as "still sending", a negative value causes the sender kthread to loop indefinitely. This leads to a use-after-free when the interface is removed while the zombie thread is still active. Fix this by using atomic_xchg() to ensure the counter only transitions from 1 to 0 once. [sven: added missing change in batadv_tp_send]

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.12%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.12%

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

Affected systems

Ubuntu166 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-139.139 | < 7.0.0-28.28
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1064.67 | < 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, < e75e2ab463b5b34df6b98f94d740aff327ce9f6b | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < abae88fa254f2981d39ac003a7b302528a22af64 | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < c66d20a3ff095e3f000551d208ec2606616db15c | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < c1bac194733aabd731aafa6a01350c229e187dba | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 01cefc5923889e29dbb5f281c3d457714ceb9c00 | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 90ae3eae06b7b8ab9f6250b9497c860915b4c17b | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < aeae11c5dad9cd0d50723890bdd866f8e6db2e7d | ≥ 33a3bb4a3345bb511f9c69c913da95d4693e2a4e, < 94f3b133168d1c49895e7cc6afbcf1cc0b354602 | 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

48 links
Show all 48 references