CVE-2026-31407

ADVISORY - nist

Summary

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.

EPSS Score⁠: 0.00169 (0.065)

Common Weakness Enumeration (CWE)

ADVISORY - nist

CWE-787⁠

Out-of-bounds Write

ADVISORY - redhat

CWE-125⁠

Out-of-bounds Read

Impacted images

Advisories

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