CVE-2026-53358Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen()
- 8.8HighCVSS base score
- 0.28%Exploitation in 30 daysEPSS · top 79% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: use chan timer to close channels in cleanup_listen() l2cap_chan_close() removes the channel from conn->chan_l, which must be done under conn->lock. cleanup_listen() runs under the parent sk_lock, so acquiring conn->lock would invert the established conn->lock -> chan->lock -> sk_lock order. Instead of calling l2cap_chan_close() directly, schedule l2cap_chan_timeout with delay 0 to close the channel asynchronously. The timeout handler already acquires conn->lock and chan->lock in the correct order. The timer is only armed when chan->conn is still set: if it is already NULL, l2cap_conn_del() has already processed this channel (l2cap_chan_del + l2cap_sock_teardown_cb + l2cap_sock_close_cb), so there is nothing left to do. If l2cap_conn_del() races in after the timer is armed, __clear_chan_timer() inside l2cap_chan_del() cancels it; if the timer has already fired, the handler returns harmlessly because chan->conn was cleared.
Timeline
ID reserved
By Linux
- 23 days later
· 23 days later
Published
- 4 months later
· 4 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Modified | 3.1 | High8.8 | CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.28% · top 79% of all CVEs (13 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.8.
Affected products
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < 3634cbdc2eb414b69ffa752ddbe5e0458518e321
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < e1c100e2d61bd8c718b7d91fe3e050780a9bf72d
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < 89dec92041717b027216e110599e4f6d6c921b79
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < 50dfec218808b148ab4247b1858031b7a32015c5
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < 859d3ace791ed878ae9ba5522c7844d960da8f88
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < 7555fd885a0603f50e49a655850a1f2bd8a25398
- affected 3df91ea20e744344100b10ae69a17211fcf5b207 – < 8c8e620467a7b51562dbcefbd1f09f288d7d710d
- affected 3.4
- unaffected < 3.4
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.93 – ≤ 6.12.*
- unaffected 6.18.35 – ≤ 6.18.*
- unaffected 7.0.12 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References9
- https://git.kernel.org/stable/c/3634cbdc2eb414b69ffa752ddbe5e0458518e321 (opens in a new tab)
- https://git.kernel.org/stable/c/e1c100e2d61bd8c718b7d91fe3e050780a9bf72d (opens in a new tab)
- https://git.kernel.org/stable/c/deb8493a8fa599f6c95e2465b12bfdfb7f94a1d9 (opens in a new tab)
- https://git.kernel.org/stable/c/89dec92041717b027216e110599e4f6d6c921b79 (opens in a new tab)
- https://git.kernel.org/stable/c/50dfec218808b148ab4247b1858031b7a32015c5 (opens in a new tab)
- https://git.kernel.org/stable/c/859d3ace791ed878ae9ba5522c7844d960da8f88 (opens in a new tab)
- https://git.kernel.org/stable/c/7555fd885a0603f50e49a655850a1f2bd8a25398 (opens in a new tab)
- https://git.kernel.org/stable/c/8c8e620467a7b51562dbcefbd1f09f288d7d710d (opens in a new tab)
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-41373 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-53358)Record last updated .