CVE-2026-72137: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: xfrm: nat_keepalive: avoid double free on send error nat_keepalive_send() frees the keepalive skb whenever the IPv4 or IPv6 send helper reports an error. That cleanup is only correct before the skb is handed to the output path. Once ip_build_and_send_pkt() or ip6_xmit() takes ownership, the networking stack may already have consumed the skb before returning an error, so freeing it again is unsafe. Handle the pre-handoff failure cases inside nat_keepalive_send_ipv4() and nat_keepalive_send_ipv6(), where the caller still owns the skb, and keep nat_keepalive_send() responsible only for family dispatch and the unsupported-family cleanup path.

Засегнати продукти

• Linux Linux: f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae преди d0a4dc7efa825bce60a8da8f7d43c864a159abde; f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae преди 5b0c4c916f202b8fd13d12afb6af62b385622f81; f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae преди a8a7e6a9ff8a4c1f067694ddbd44be67fdf36693; f531d13bdfe3f4f084aaa8acae2cb0f02295f5ae преди 226f4a490d1a938fc838d8f8c46a4eca864c0d78
• Linux Linux: 6.11; преди 6.11; 6.12.101 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-72137
• https://nvd.nist.gov/vuln/detail/CVE-2026-72137
• https://git.kernel.org/stable/c/d0a4dc7efa825bce60a8da8f7d43c864a159abde
• https://git.kernel.org/stable/c/5b0c4c916f202b8fd13d12afb6af62b385622f81
• https://git.kernel.org/stable/c/a8a7e6a9ff8a4c1f067694ddbd44be67fdf36693
• https://git.kernel.org/stable/c/226f4a490d1a938fc838d8f8c46a4eca864c0d78