CVE-2026-31499

MEDIUM EPSS 0.8%
Published Apr 22, 20262mo ago · Modified Jun 17, 20262w ago
5.5 CVSS 3.1
Medium
Find Similar
Published Apr 22, 2026 2mo ago
Last Modified Jun 17, 2026 2w ago

Description

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix deadlock in l2cap_conn_del() l2cap_conn_del() calls cancel_delayed_work_sync() for both info_timer and id_addr_timer while holding conn->lock. However, the work functions l2cap_info_timeout() and l2cap_conn_update_id_addr() both acquire conn->lock, creating a potential AB-BA deadlock if the work is already executing when l2cap_conn_del() takes the lock. Move the work cancellations before acquiring conn->lock and use disable_delayed_work_sync() to additionally prevent the works from being rearmed after cancellation, consistent with the pattern used in hci_conn_del().

CVSS Details

Base Score
5.5
Exploitability
1.8
Impact
3.6
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
0.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-667

Affected Products 13

VendorProductVersionRange
linuxlinux_kernel*≥6.6.84  –  <6.7
linuxlinux_kernel*≥6.12.20  –  <6.13
linuxlinux_kernel*≥6.13.8  –  <6.14
linuxlinux_kernel*≥6.14.1  –  <6.18.21
linuxlinux_kernel*≥6.19  –  <6.19.11
linuxlinux_kernel6.14any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 4

  • git.kernel.org https://git.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/f7f35a4f7fd574f5889bb2e4b397e14cbb83f6da

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/00fdebbbc557a2fc21321ff2eaa22fd70c078608
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/3f26ecbd9cde621dd94be7ef252c7210b965a5c7
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/d008460de352e534f6721de829b093368564ec66
    Patch