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kernel: Linux kernel: Denial of Service via unsafe requeue in rxrpc_recvmsg

🗓️ 22 Apr 2026 00:15:56Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com👁 7 Views

Unprivileged users can trigger DoS via unsafe rxrpc_recvmsg requeue with AF_RXRPC using MSG_DONTWAIT and MSG_PEEK, causing memory corruption.

Related
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Refs
ReporterTitlePublishedViews
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ATTACKERKB		CVE-2026-23066
4 Feb 202616:07
–attackerkb
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2-2026-3237 (ALAS-2026-3237)
8 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.10-2026-115 (ALASKERNEL-5.10-2026-115)
1 Apr 202600:00
–nessus
Tenable Nessus		Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2026-119 (ALASKERNEL-5.4-2026-119)
8 Apr 202600:00
–nessus
Tenable Nessus		Debian dla-4664 : ata-modules-5.10.0-43-armmp-di - security update
3 Jul 202600:00
–nessus
Tenable Nessus		Debian dla-4665 : affs-modules-6.1.0-48-4kc-malta-di - security update
3 Jul 202600:00
–nessus
Tenable Nessus		Debian dla-4671 : linux-config-6.1 - security update
6 Jul 202600:00
–nessus
Tenable Nessus		Debian dsa-6238 : ata-modules-6.12.74+deb13+1-armmp-di - security update
30 Apr 202600:00
–nessus
Tenable Nessus		openSUSE 16 Security Update : kernel (openSUSE-SU-2026:20416-1)
29 Mar 202600:00
–nessus
Tenable Nessus		Photon OS 5.0: Linux PHSA-2026-5.0-0842
9 May 202600:00
–nessus
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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux9.2x86_64kernel-rt5.14.0-284.166.1.rt14.451.el9_2kernel-rt-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-core5.14.0-284.166.1.rt14.451.el9_2kernel-rt-core-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-core5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-core-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-debuginfo5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-debuginfo-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-devel5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-devel-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-kvm5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-kvm-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-modules5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-modules-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-modules-core5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-modules-core-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
Red Hat Enterprise Linux9.2x86_64kernel-rt-debug-modules-extra5.14.0-284.166.1.rt14.451.el9_2kernel-rt-debug-modules-extra-5.14.0-284.166.1.rt14.451.el9_2.x86_64.rpm
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12 Jul 2026 07:55Current
5.8Medium risk
Vulners AI Score5.8
CVSS 3.15.5 - 7.8
EPSS0.00129
CWE-416
rxrpcmemory corruptiondenial of serviceaddress family rxrpcmessage flags dontwaitmessage peek
7