Bluetooth: L2CAP: cancel pending_rx_work before taking conn->lock (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 17 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Modified
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: cancel pending_rx_work before taking conn->lock l2cap_conn_del() takes conn->lock and then calls cancel_work_sync() for pending_rx_work. process_pending_rx() takes the same mutex, so teardown can deadlock against the worker it is flushing. This issue was found by our static analysis tool and then manually reviewed against the current tree. The grounded PoC kept the l2cap_conn_ready() -> queue_work(..., &conn->pending_rx_work) submit path, the l2cap_conn_del() -> cancel_work_sync(&conn->pending_rx_work) teardown path, and the process_pending_rx() -> mutex_lock(&conn->lock) worker edge. Lockdep WARNING: possible circular locking dependency detected process_pending_rx+0x21/0x2a [vuln_msv] l2cap_conn_del.constprop.0+0x3f/0x4e [vuln_msv] *** DEADLOCK *** Cancel pending_rx_work before taking conn->lock, matching the existing lock-before-drain ordering used for the two delayed works in the same teardown path. The pending_rx queue is still purged after the work has been cancelled and conn->lock has been acquired.
Weaknesses (CWE)
- CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization
References
- https://git.kernel.org/stable/c/fc0c3b9cf27cfa2a06f66dae1d08c668fe0a2faa
- https://git.kernel.org/stable/c/9901f847a762a5d953871dd95767ce2aed3d684d
- https://git.kernel.org/stable/c/4a0bb0fd63fe2b0c62e1072cd1811d6f61e0081c
- https://git.kernel.org/stable/c/8daaf7f73fe998631a160d1a5a7e1b0b0480eef8
- https://git.kernel.org/stable/c/8de7b386ffad480ca59222b688c94a2da8f0d805
- https://git.kernel.org/stable/c/d5616beb3355b5fca2280d796c1cf7ada4ee6551
- https://git.kernel.org/stable/c/e96fbac8d3a73b0bc165383c092a30628561d320
- https://git.kernel.org/stable/c/2641a9e0a1dd4af2e21995470a21d55dd35e5203
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | Linux |
| CVSS 3.1 | HIGH 8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | NVD · 416baaa9-dc9f-4396-8d5f-8c081fb06d67 (Secondary) |
European references
- ENISA EUVD · EUVD-2026-46014
- GCVE · GCVE-0-2026-64206
CERT-FR advisories
- CERTFR-2026-AVI-1385 — Multiples vulnérabilités dans les produits VMware · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1333 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1286 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1252 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1229 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1203 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1162 — Multiples vulnérabilités dans le noyau Linux d'Ubuntu · cert.ssi.gouv.fr
- CERTFR-2026-AVI-1031 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0982 — Multiples vulnérabilités dans le noyau Linux de Debian LTS · cert.ssi.gouv.fr
- CERTFR-2026-AVI-0981 — Multiples vulnérabilités dans le noyau Linux de Debian · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 3.15.5 < 3.16cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 3.16.1 < 5.10.261cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.15.212cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.178cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.6.145cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.7 < 6.12.97cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.13 < 6.18.39cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.19 < 7.1.4cpe:2.3:o:linux:linux_kernel:3.16:-:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.16:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.16:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.16:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.16:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:3.16:rc7:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.2:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:7.2:rc2:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 7ab56c3a6eccb215034b0cb096e0313441cbf2a4 < fc0c3b9cf27cfa2a06f66dae1d08c668fe0a2faa ; affected 7ab56c3a6eccb215034b0cb096e0313441cbf2a4 < 9901f847a762a5d953871dd95767ce2aed3d684d ; affected 7ab56c3a6eccb215034b0cb096e0313441cbf2a4 < 4a0bb0fd63fe2b0c62e1072cd1811d6f61e0081c ; affected 7ab56c3a6eccb215034b0cb096e0313441cbf2a4 < 8daaf7f73fe998631a160d1a5a7e1b0b0480eef8 ; affected 7ab56c3a6eccb215034b0cb096e0313441cbf2a4 < 8de7b386ffad480ca59222b688c94a2da8f0d805 ; affected 7ab56c3a6eccb215034b0cb096e0313441cbf2a4 < d5616beb3355b5fca2280d796c1cf7ada4ee6551 |
| Linux · Linux | affected 3.16 ; unaffected 0 < 3.16 ; unaffected 5.10.261 ≤ 5.10.* ; unaffected 5.15.212 ≤ 5.15.* ; unaffected 6.1.178 ≤ 6.1.* ; unaffected 6.6.145 ≤ 6.6.* |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |