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.

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Produits concernés

• Linux
• Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem
• Linux linux kernel

Scores CVSS

Faiblesses (CWE)

• CWE-401

Références

• https://git.kernel.org/stable/c/0bb5b2dc1b90aa7dd1473fc8c4d813a29255ff8d Patch
• https://git.kernel.org/stable/c/25fdf53698535fe8790237f5a8a9626791429785 Patch
• https://git.kernel.org/stable/c/895d1dd9057cde1687fa0f4286d47ceed0b82997 Patch
• https://git.kernel.org/stable/c/971b1b37774f13acc5add0a2843f8598446b8598 Patch
• https://git.kernel.org/stable/c/e248fb2e680deb2bd37bac551b72638fe4938a76 Patch
• https://git.kernel.org/stable/c/e3d509a1b71396e1452060dbf84a805fd1c3c549 Patch
• https://git.kernel.org/stable/c/ecc55aad3390129a87106841f4b68bf3d70c9264 Patch
• https://git.kernel.org/stable/c/ee30dd2909d8b98619f4341c70ec8dc8e155ab02 Patch
• https://cert-portal.siemens.com/productcert/html/ssa-784472.html

Ailleurs

• NVD
• CVE.org
• CIRCL Vulnerability-Lookup
• CERT-FR
• GitHub Advisories