Improper resource shutdown or release in Linux kernel - CVE-2026-74678

Vulnerability details

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource shutdown or release in ax88179_tx_fixup() when processing transmitted socket buffers with NETIF_F_SG enabled and skb_linearize() fails. A local user can trigger transmission of packets under memory pressure to cause a denial of service.

The issue occurs because the socket buffer is not freed when the function returns NULL on the linearization failure path.

Affected software

How to mitigate CVE-2026-74678

External References

• https://git.kernel.org/stable/c/1c63303659a2264bd55d9813df74cb4caeed5922
• https://git.kernel.org/stable/c/1f428e30947395d9b9aacee03e25a4e6cfcad7a4
• https://git.kernel.org/stable/c/2be5091fa693b9119ad25a8bb8c149d236a23ade
• https://git.kernel.org/stable/c/4039cd807a5a46dc5f7618fffae926b8ad8455eb
• https://git.kernel.org/stable/c/58733b1dd46bb231d9d279c132a20ee46da1b664
• https://git.kernel.org/stable/c/83a765cbd7b4d11b0b9fa1bb9d941ae911a2159b

Related Security Bulletins

• Improper resource shutdown or release in Linux kernel net usb driver
• Debian update for linux