CVE-2026-53227
Description
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: fix possible kfree_skb of ERR_PTR After the patch in the "Fixes" tag, the allocation of the "reply" skb can happen either before or after locking the ovs_mutex. However, error cleanups still follow the classical reversed order, assuming "reply" is allocated before locking: it is freed after unlocking. If "reply" allocation happens after locking the mutex and it fails, "reply" is left with an ERR_PTR, and execution jumps to the correspondent cleanup stage which will try to free an invalid pointer. Fix this by setting the pointer to NULL after having saved its error value.
How to fix
- linux linux_kernel5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13 or later
- git.kernel.org/stable/c/0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d
- git.kernel.org/stable/c/25fdf53698535fe8790237f5a8a9626791429785
- git.kernel.org/stable/c/895d1dd9057cde1687fa0f4286d47ceed0b82997
- git.kernel.org/stable/c/971b1b37774f13acc5add0a2843f8598446b8598
- git.kernel.org/stable/c/e248fb2e680deb2bd37bac551b72638fe4938a76
- git.kernel.org/stable/c/e3d509a1b71396e1452060dbf84a805fd1c3c549
- git.kernel.org/stable/c/ecc55aad3390129a87106841f4b68bf3d70c9264
- git.kernel.org/stable/c/ee30dd2909d8b98619f4341c70ec8dc8e155ab02
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 3.16 ≤ v < 5.10.259, 5.11 ≤ v < 5.15.210, 5.16 ≤ v < 6.1.176, 6.2 ≤ v < 6.6.143, 6.7 ≤ v < 6.12.94, 6.13 ≤ v < 6.18.36, 6.19 ≤ v < 7.0.13, 7.1 | 5.10.259, 5.15.210, 6.1.176, 6.6.143, 6.12.94, 6.18.36, 7.0.13 |
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