PT-2026-30575 · Linux · Linux Kernel

Hyunwoo Kim · Published 2026-04-06 · Updated 2026-05-20 · CVE-2026-31407

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Name of the Vulnerable Software and Affected Versions Linux kernel (affected versions not specified)

Description The Linux kernel contains a flaw in its netfilter component related to conntrack and missing netlink policy validations. Specifically, the nlattr to sctp() function improperly handles user-supplied CTA PROTOINFO SCTP STATE values, potentially leading to an out-of-bounds access. This issue can occur when processing netlink attributes without proper validation, resulting in a slab-out-of-bounds read. The vulnerability affects the ctnetlink functionality.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

Memory Corruption

Weakness Enumeration

CWE-125

CWE-787

Related Identifiers

BDU:2026-05099

CVE-2026-31407

ECHO-822E-A5C8-1E1E

OESA-2026-2232

OESA-2026-2235

OESA-2026-2236

Affected Products

Linux Kernel

References · 37

• https://git.kernel.org/stable/c/9174d28f3f15d8c4962f5980c0be167633880443 · Patch
• https://git.kernel.org/stable/c/c5e918390002edf0cff80a0e7ce1f86f16a9507c · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-23442 · Security Note
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2204-CVE-2026-31407 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-31407 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31423 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31782 · Security Note
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-31407 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-31407 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31424 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31407 · Security Note
• https://osv.dev/vulnerability/BELL-CVE-2026-31407 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-31680 · Security Note
• https://osv.dev/vulnerability/OESA-2026-2236 · Vendor Advisory
• https://git.kernel.org/stable/c/f900e1d77ee0ef87bfb5ab3fe60f0b3d8ad5ba05 · Patch