CVE-2026-23461
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
Bluetooth: L2CAP: Fix use-after-free in l2cap_unregister_user
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix use-after-free in l2cap_unregister_user After commit ab4eedb790ca ("Bluetooth: L2CAP: Fix corrupted list in hci_chan_del"), l2cap_conn_del() uses conn->lock to protect access to conn->users. However, l2cap_register_user() and l2cap_unregister_user() don't use conn->lock, creating a race condition where these functions can access conn->users and conn->hchan concurrently with l2cap_conn_del(). This can lead to use-after-free and list corruption bugs, as reported by syzbot. Fix this by changing l2cap_register_user() and l2cap_unregister_user() to use conn->lock instead of hci_dev_lock(), ensuring consistent locking for the l2cap_conn structure.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| efc30877bd4bc85fefe98d80af60fafc86e5775e | affected | git | 11a87dd5df428a4b79a84d2790cac7f3c73f1f0d | Unavailable | None listed |
| f87271d21dd4ee83857ca11b94e7b4952749bbae | affected | git | c22a5e659959eb77c2fbb58a5adfaf3c3dab7abf | Unavailable | None listed |
| ab4eedb790cae44313759b50fe47da285e2519d5 | affected | git | da3000cbe4851458a22be38bb18c0689c39fdd5f | Unavailable | None listed |
| ab4eedb790cae44313759b50fe47da285e2519d5 | affected | git | 71030f3b3015a412133a805ff47970cdcf30c2b8 | Unavailable | None listed |
| ab4eedb790cae44313759b50fe47da285e2519d5 | affected | git | 752a6c9596dd25efd6978a73ff21f3b592668f4a | Unavailable | None listed |
| 18ab6b6078fa8191ca30a3065d57bf35d5635761 | affected | git | Unavailable | Unavailable | None listed |
| 6.6.84 | affected | semver | 6.6.130 | Unavailable | None listed |
| 6.12.20 | affected | semver | 6.12.78 | Unavailable | None listed |
| 6.13.8 | affected | semver | 6.14 | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 6.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 6.14 | Unavailable | None listed |
| 6.6.130 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.78 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.20 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 6.19.10 | unaffected | semver | Unavailable | 6.19.* | None listed |
| 7.0 | unaffected | original_commit_for_fix | Unavailable | * | None listed |