CVE-2026-31407

In the Linux kernel, the following vulnerability has been resolved: netfilter: conntrack: add missing netlink policy validations Hyunwoo Kim reports out-of-bounds access in sctp and ctnetlink. These attributes are used by the kernel without any validation. Extend the netlink policies accordingly. Quoting the reporter: nlattr_to_sctp() assigns the user-supplied CTA_PROTOINFO_SCTP_STATE value directly to ct->proto.sctp.state without checking that it is within the valid range. [..] and: ... with exp->dir = 100, the access at ct->master->tuplehash[100] reads 5600 bytes past the start of a 320-byte nf_conn object, causing a slab-out-of-bounds read confirmed by UBSAN.

The following products are affected by CVE-2026-31407 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-31407.

URL	Resource
https://git.kernel.org/stable/c/0fbae1e74493d5a160a70c51aeba035d8266ea7d
https://git.kernel.org/stable/c/f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05
https://lore.kernel.org/linux-cve-announce/2026040628-CVE-2026-31407-6abd@gregkh/T
https://nvd.nist.gov/vuln/detail/CVE-2026-31407
https://www.cve.org/CVERecord?id=CVE-2026-31407