Answer in brief
CVE-2026-52931 records a Critical severity (CVSS 9.8) vulnerability in batman-adv: tp_meter: avoid use of uninit sender vars. 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.
Answer in brief
CVE-2026-52931 records a Critical severity (CVSS 9.8) vulnerability in batman-adv: tp_meter: avoid use of uninit sender vars. 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 9.8. 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 <0e388af04b3958b178a1b979527f93eb46ea1fee || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <1a21c055f66e78973712a4a1be2a554f1ee2e4f4 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <9884c9c02d3c90e9215db3c5128f59045d20ae91 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <53f931e0146ae5bdab4cba302646827d06b3794b || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <dc2ae5fbd2dadc26735092f140b246841d969a11 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <85397e48afe6be83ffca5ad3f4792296bfc81d3d || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <6c65cf23d4c6170fcf5714c32aa64689718cb142 | 0e388af04b3958b178a1b979527f93eb46ea1fee, 1a21c055f66e78973712a4a1be2a554f1ee2e4f4, 9884c9c02d3c90e9215db3c5128f59045d20ae91, 53f931e0146ae5bdab4cba302646827d06b3794b, ecdaa3e4d91040206afe21bc8a0d1198a0971ff3, dc2ae5fbd2dadc26735092f140b246841d969a11, 85397e48afe6be83ffca5ad3f4792296bfc81d3d, 6c65cf23d4c6170fcf5714c32aa64689718cb142 |
| 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: 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.
Quoted source text, attributed separately from HOL analysis.
CVSS is 9.8. 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 <0e388af04b3958b178a1b979527f93eb46ea1fee || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <1a21c055f66e78973712a4a1be2a554f1ee2e4f4 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <9884c9c02d3c90e9215db3c5128f59045d20ae91 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <53f931e0146ae5bdab4cba302646827d06b3794b || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <ecdaa3e4d91040206afe21bc8a0d1198a0971ff3 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <dc2ae5fbd2dadc26735092f140b246841d969a11 || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <85397e48afe6be83ffca5ad3f4792296bfc81d3d || >=33a3bb4a3345bb511f9c69c913da95d4693e2a4e <6c65cf23d4c6170fcf5714c32aa64689718cb142 | 0e388af04b3958b178a1b979527f93eb46ea1fee, 1a21c055f66e78973712a4a1be2a554f1ee2e4f4, 9884c9c02d3c90e9215db3c5128f59045d20ae91, 53f931e0146ae5bdab4cba302646827d06b3794b, ecdaa3e4d91040206afe21bc8a0d1198a0971ff3, dc2ae5fbd2dadc26735092f140b246841d969a11, 85397e48afe6be83ffca5ad3f4792296bfc81d3d, 6c65cf23d4c6170fcf5714c32aa64689718cb142 |
| 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: 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.
Quoted source text, attributed separately from HOL analysis.