CVE-2026-74255
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)
tipc: fix UAF in tipc_l2_send_msg()
In the Linux kernel, the following vulnerability has been resolved: tipc: fix UAF in tipc_l2_send_msg() Syzbot reported a slab-use-after-free in ipvlan_hard_header() when called from tipc_l2_send_msg(). The root cause is that tipc_disable_l2_media() calls synchronize_net() while b->media_ptr is still valid. This allows concurrent RCU readers to obtain the device pointer after synchronize_net() has finished. The pointer is cleared later in bearer_disable(), but without any subsequent synchronization, allowing the device to be freed while still in use by readers. Fix this by clearing b->media_ptr in tipc_disable_l2_media() before calling synchronize_net(). This is safe to do now because the call order in bearer_disable() was reversed in 0d051bf93c06 ("tipc: make bearer packet filtering generic") to call tipc_node_delete_links() (which needs the pointer) before disable_media(). https: //lore.kernel.org/netdev/6a2c1007.428ffe26.258b27.015d.GAE@google.com/T/#u
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) |
|---|---|---|---|---|---|
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | 609ced2301be1df7e7ed2ef47d1d916674e6ba3b | Unavailable | None listed |
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | 71aafa16d79b107b33837f60b6cbc7d0cb8c5708 | Unavailable | None listed |
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | f4002f1c669cc02e3763f479fc25ff1dfa9e2420 | Unavailable | None listed |
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | 50ff092633b06382e5091dd5b093ce943d4ac2f9 | Unavailable | None listed |
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | aef12b5ce793dea6b3a97a58fd0f946000ae8945 | Unavailable | None listed |
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | 0d8a12d7143126afdf9fbe2e3d438650dd6603ed | Unavailable | None listed |
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | 35e0297a93c3c34a3924eeef816c03504e3ab5c5 | Unavailable | None listed |
| 282b3a056225b35024246f63feb91d769d714dad | affected | git | f4c3d89fc986b0da196ddfc6cfe0ea5d5d08bec6 | 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) |
|---|---|---|---|---|---|
| 4.4 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.4 | Unavailable | None listed |
| 5.10.261 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.212 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.178 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.145 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.97 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.40 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.1.5 | unaffected | semver | Unavailable | 7.1.* | None listed |
| 7.2 | unaffected | original_commit_for_fix | Unavailable | * | None listed |