CVE-2026-74540
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 UAF in l2cap_le_connect_rsp
In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: fix UAF in l2cap_le_connect_rsp l2cap_le_connect_rsp() obtains a channel via __l2cap_get_chan_by_ident() but neither holds a reference nor uses l2cap_chan_hold_unless_zero() before locking and operating on it. A concurrent l2cap_chan_del() triggered by a remote disconnect can free the channel between the lookup and l2cap_chan_lock(), causing a use-after-free. The BR/EDR counterpart l2cap_connect_rsp() and the sibling handler l2cap_le_command_rej() already use l2cap_chan_hold_unless_zero() to safely hold a reference, but l2cap_le_connect_rsp() was left unprotected. Fix by adding l2cap_chan_hold_unless_zero() after the ident lookup and l2cap_chan_put() on the exit path, consistent with other L2CAP response handlers.
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) |
|---|---|---|---|---|---|
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | 15d6c2367217a6a20b1abae9f38ded716bf620f1 | Unavailable | None listed |
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | 1818180fe12d6cec7a437bc59cde8efdf6b10250 | Unavailable | None listed |
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | 8325eafb38c3dee5af329266393763693d17381b | Unavailable | None listed |
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | fd4c1e301bdec60a40728ea37de531cbccda501a | Unavailable | None listed |
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | 522b730c62c53a1981604fd73524697fd347830d | Unavailable | None listed |
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | 58e3c5289ad230a7e24ae4b0c7b43f5ee6e32136 | Unavailable | None listed |
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | 09f447accc2570751e7d17f0dc0788b40d3edade | Unavailable | None listed |
| f1496dee9cbde2a62821f4441dadb0d3360f60c3 | affected | git | c4740e7f23ff9a8210198d8b4703259e21b9f69d | 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) |
|---|---|---|---|---|---|
| 3.14 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 3.14 | Unavailable | None listed |
| 5.10.265 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.216 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.183 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.151 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.103 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.44 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.8 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |