Answer in brief
CVE-2026-31408 records a High severity (CVSS 8.8) 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.
CVSS is 8.8. 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.
| Product | Affected versions | Fixed versions |
|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:-:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:2.6.12:rc5:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:* | Not reported | Not reported |
| cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:* | Not reported | Not reported |
| 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.