CVE-2026-31408Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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Free account, 1 product
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.
- CVSS
- 8.8 HIGH (v3.1, CNA)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 37e18bc8c9a70d77bd099e2273f328b3bc7f6d0d; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before d57384e27d1ebf0047e3f00a6e1181b8be9857a2; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before b0a7da0e3f7442545f071499beb36374714bb9de; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 45aaca995e4a7a05b272a58e7ab2fff4f611b8f1; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 108b81514d8f2535eb16651495cefb2250528db3; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 7197462e90b8ce15caa1ae15d4bc2bb8cd21b11e; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before e76e8f0581ef555eacc11dbb095e602fb30a5361; from 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 before 598dbba9919c5e36c54fe1709b557d64120cb94b | CNA record |
linux linux_kernel linux:linux_kernel | from 2.6.12.1 before 5.15.203; from 5.16 before 6.1.168; from 6.2 before 6.6.131; from 6.7 before 6.12.80; from 6.13 before 6.18.21; from 6.19 before 6.19.11; 2.6.12; 2.6.12; and 8 more ranges | NVD |
References
- https://git.kernel.org/stable/c/37e18bc8c9a70d77bd099e2273f328b3bc7f6d0d
- https://git.kernel.org/stable/c/d57384e27d1ebf0047e3f00a6e1181b8be9857a2patch
- https://git.kernel.org/stable/c/b0a7da0e3f7442545f071499beb36374714bb9depatch
- https://git.kernel.org/stable/c/45aaca995e4a7a05b272a58e7ab2fff4f611b8f1patch
- https://git.kernel.org/stable/c/108b81514d8f2535eb16651495cefb2250528db3patch
- https://git.kernel.org/stable/c/7197462e90b8ce15caa1ae15d4bc2bb8cd21b11epatch
- https://git.kernel.org/stable/c/e76e8f0581ef555eacc11dbb095e602fb30a5361patch
- https://git.kernel.org/stable/c/598dbba9919c5e36c54fe1709b557d64120cb94bpatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.