CVE-2026-53006
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching saddr and daddr before pskb_pull() is problematic since skb->head can change. Remove these temporary variables: - We only access &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr when net_dbg_ratelimited() is called in the slow path. - Avoid potential future misuse after pskb_pull() call.
Ver en NVDAnálisis
A critical vulnerability in the Linux kernel networking stack (IPv6) allows for a Use-After-Free condition via crafted ICMPv6 packets. This could lead to remote code execution or system crashes on any internet-facing Linux server with IPv6 enabled.
Roles relevantes
Severidad
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HEPSS
Descripción técnica
In the Linux kernel, the following vulnerability has been resolved: ipv6: fix possible UAF in icmpv6_rcv() Caching saddr and daddr before pskb_pull() is problematic since skb->head can change. Remove these temporary variables: - We only access &ipv6_hdr(skb)->saddr and &ipv6_hdr(skb)->daddr when net_dbg_ratelimited() is called in the slow path. - Avoid potential future misuse after pskb_pull() call.
Referencias
- https://git.kernel.org/stable/c/0069813e6ca9309eca78022bcb3aeb1e9ef90a12
- https://git.kernel.org/stable/c/085e31a811ef234ef8c3e219c4636dfebfe7e10f
- https://git.kernel.org/stable/c/1e1f0f89ee4692a64be3f3707ff8ac1ae57b03e7
- https://git.kernel.org/stable/c/38bdbc897c0d83a3e2b925a51b69420f1feba29a
- https://git.kernel.org/stable/c/7bff2c8fe5c35ae58bf73104f53db3676e6e5d94
- https://git.kernel.org/stable/c/7c66b368c6ff453f99cb39d84af93e908e51eef2
- https://git.kernel.org/stable/c/aff0f28f5be803de2452ce702631c021fcd9ce8a
- https://git.kernel.org/stable/c/f996edd7615e686ada141b7f3395025729ff8ccb