Answer in brief
CVE-2026-52919 records a High severity (CVSS 7.8) vulnerability in batman-adv: fix tp_meter counter underflow during shutdown. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <e75e2ab463b5b34df6b98f94d740aff327ce9f6b || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <abae88fa254f2981d39ac003a7b302528a22af64 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <c66d20a3ff095e3f000551d208ec2606616db15c || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <c1bac194733aabd731aafa6a01350c229e187dba || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <01cefc5923889e29dbb5f281c3d457714ceb9c00 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <90ae3eae06b7b8ab9f6250b9497c860915b4c17b || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <aeae11c5dad9cd0d50723890bdd866f8e6db2e7d || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <94f3b133168d1c49895e7cc6afbcf1cc0b354602 | e75e2ab463b5b34df6b98f94d740aff327ce9f6b, abae88fa254f2981d39ac003a7b302528a22af64, c66d20a3ff095e3f000551d208ec2606616db15c, c1bac194733aabd731aafa6a01350c229e187dba, 01cefc5923889e29dbb5f281c3d457714ceb9c00, 90ae3eae06b7b8ab9f6250b9497c860915b4c17b, aeae11c5dad9cd0d50723890bdd866f8e6db2e7d, 94f3b133168d1c49895e7cc6afbcf1cc0b354602 |
| Linux/Linuxgeneric | 4.8 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
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]
Quoted source text, attributed separately from HOL analysis.