CVE-2026-74536Bluetooth: ISO: fix leaking sk after socket release
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% 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: ISO: fix leaking sk after socket release iso_sock_kill() tests !sock_flag(sk, SOCK_ZAPPED) || sk->sk_socket || sock_flag(sk, SOCK_DEAD) for early return, but this is always true since sock_orphan(sk) sets SOCK_DEAD, so the sk reference released by socket always leaks, iso_sock_destruct is never called. The socket reference also leaks when __iso_sock_close() does not set SOCK_ZAPPED, since iso_conn_del() does not call iso_sock_kill() after zapping. Fix by replacing SOCK_DEAD by BT_SK_KILLED flag that is not used for something else, and lock_sock to ensure iso_sock_kill() puts sk only after socket release only once. Release and iso_conn_del may run concurrently. Call iso_sock_kill() from iso_conn_del() to clean sk up after zapping. Remove call to iso_sock_kill() from iso_sock_close(), as it's generally no-op there.
Timeline
ID reserved
By Linux
Published
- 2 days later
· 2 days 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
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected ccf74f2390d60a2f9a75ef496d2564abb478f46a – < 96ed3c772c08e7a91c399567f412618e43231023
- affected ccf74f2390d60a2f9a75ef496d2564abb478f46a – < e76a0ae6542ae43241b2147bacf4990e7ae5316a
- affected ccf74f2390d60a2f9a75ef496d2564abb478f46a – < e30e5ca63c8fbe3cd505fbb419bb547760cda633
- affected ccf74f2390d60a2f9a75ef496d2564abb478f46a – < ce57442a379212fe3fda59c9437ee8217eceb5b1
- affected 6.0
- unaffected < 6.0
- unaffected 6.12.103 – ≤ 6.12.*
- unaffected 6.18.44 – ≤ 6.18.*
- unaffected 7.1.8 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/96ed3c772c08e7a91c399567f412618e43231023 (opens in a new tab)
- https://git.kernel.org/stable/c/e76a0ae6542ae43241b2147bacf4990e7ae5316a (opens in a new tab)
- https://git.kernel.org/stable/c/e30e5ca63c8fbe3cd505fbb419bb547760cda633 (opens in a new tab)
- https://git.kernel.org/stable/c/ce57442a379212fe3fda59c9437ee8217eceb5b1 (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-2026-59729 (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-2026-74536)Record last updated .