Answer in brief
CVE-2026-31408 records a Unknown severity vulnerability in Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold. 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.
A CVSS score is not reported in the current record. 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 | >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <37e18bc8c9a70d77bd099e2273f328b3bc7f6d0d || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <d57384e27d1ebf0047e3f00a6e1181b8be9857a2 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <b0a7da0e3f7442545f071499beb36374714bb9de || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <45aaca995e4a7a05b272a58e7ab2fff4f611b8f1 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <108b81514d8f2535eb16651495cefb2250528db3 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <e76e8f0581ef555eacc11dbb095e602fb30a5361 || >=1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 <598dbba9919c5e36c54fe1709b557d64120cb94b | 37e18bc8c9a70d77bd099e2273f328b3bc7f6d0d, d57384e27d1ebf0047e3f00a6e1181b8be9857a2, b0a7da0e3f7442545f071499beb36374714bb9de, 45aaca995e4a7a05b272a58e7ab2fff4f611b8f1, 108b81514d8f2535eb16651495cefb2250528db3, 7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e, e76e8f0581ef555eacc11dbb095e602fb30a5361, 598dbba9919c5e36c54fe1709b557d64120cb94b |
| Linux/Linuxgeneric | 2.6.12 | Not reported |
Published upstream
Apr 6, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 19, 2026
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold sco_recv_frame() reads conn->sk under sco_conn_lock() but immediately releases the lock without holding a reference to the socket. A concurrent close() can free the socket between the lock release and the subsequent sk->sk_state access, resulting in a use-after-free. Other functions in the same file (sco_sock_timeout(), sco_conn_del()) correctly use sco_sock_hold() to safely hold a reference under the lock. Fix by using sco_sock_hold() to take a reference before releasing the lock, and adding sock_put() on all exit paths.
Quoted source text, attributed separately from HOL analysis.