PT-2026-26045 · Linux · Linux Kernel

Published 2026-01-01 · Updated 2026-04-23 · CVE-2026-23242

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/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 within the RDMA/siw component related to header processing. Specifically, a potential NULL pointer dereference can occur in the siw tcp rx data() function if siw get hdr() returns -EINVAL before set rx fpdu context(), leading to qp->rx fpdu being NULL. The error path then attempts to dereference qp->rx fpdu->more ddp segs without a prior check, potentially causing a NULL pointer dereference. The issue is identified through KASAN reports indicating a null-ptr-deref within the specified memory range.

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

Exploit

Related Identifiers

CVE-2026-23242

ECHO-3284-2BE2-E3D8

OPENSUSE-SU-2026:20572-1

SUSE-SU-2026:1573-1

SUSE-SU-2026:1661-1

SUSE-SU-2026:21114-1

SUSE-SU-2026:21123-1

SUSE-SU-2026:21237-1

SUSE-SU-2026:21255-1

SUSE-SU-2026:21352-1

SUSE-SU-2026:21361-1

Affected Products

Linux Kernel

References · 217

• 🔥 https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/23xxx/CVE-2026-23242.json · Exploit
• https://osv.dev/vulnerability/BELL-CVE-2026-23242 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:1573-1 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-23242 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:21237-1 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-23242 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2026-23242 · Vendor Advisory
• https://osv.dev/vulnerability/ROOT-OS-UBUNTU-2404-CVE-2026-23242 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:21114-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:20572-1 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:21123-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-23242 · Security Note
• https://ubuntu.com/security/CVE-2026-23242 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-23242 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-23242 · Security Note