PT-2026-43777 · Linux · Linux Kernel

Published 2026-05-27 · Updated 2026-06-15 · CVE-2026-45910

Positive Technologies (AI Summary)

CVSS v3.1

7.8

High

Base vector

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

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

Description A race condition exists between the retransmit timer() and rxe destroy qp() functions in the RDMA/rxe component. This occurs when the Queue Pair (QP) reference count drops to zero while a timer handler is executing, potentially leading to a refcount underflow and use-after-free scenario. The issue is triggered when rxe put() decreases the reference count to zero during the execution of retransmit timer(), before the QP validity is checked in rxe sched task().

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

Related Identifiers

CVE-2026-45910

SUSE-SU-2026:22108-1

SUSE-SU-2026:2310-1

Affected Products

Linux Kernel

References · 231

• https://cve.org/CVERecord?id=CVE-2026-45910 · Security Note
• https://ubuntu.com/security/CVE-2026-45910 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-45910 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:2310-1 · Vendor Advisory
• https://osv.dev/vulnerability/BELL-CVE-2026-45910 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-45910 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-45910 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2026-45910 · Vendor Advisory
• https://osv.dev/vulnerability/SUSE-SU-2026:22108-1 · Vendor Advisory
• https://bugzilla.suse.com/1264091 · Note
• https://suse.com/security/cve/CVE-2026-43013 · Note
• https://suse.com/security/cve/CVE-2026-31405 · Note
• https://suse.com/security/cve/CVE-2026-31629 · Note
• https://bugzilla.suse.com/1263995 · Note
• https://suse.com/security/cve/CVE-2026-31480 · Note