Out-of-bounds read in Linux kernel - CVE-2026-53186

Vulnerability identifier: #VU135591

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-53186

CWE-ID: CWE-125

Exploitation vector: Adjecent network

Exploit availability: No public exploit available

The vulnerability allows a remote user to cause a denial of service.

The vulnerability exists due to an out-of-bounds read in srp_process_rsp() when processing a crafted SRP_RSP response from an SRP target. A remote user can send a specially crafted SRP_RSP with SRP_RSP_FLAG_SNSVALID set and a large resp_data_len value to cause a denial of service.

Exploitation requires that the initiator is logged into a malicious or compromised SRP target on the InfiniBand or RoCE fabric.

Linux kernel
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
openEuler
Ubuntu
kernel-livepatch-6_4_0-150700_7_67-rt
kernel-livepatch-SLE15-SP7-RT_Update_18-debugsource
kernel-livepatch-6_4_0-150700_7_67-rt-debuginfo
kernel-livepatch-SLE15-SP7_Update_19-debugsource
kernel-livepatch-6_4_0-150700_53_73-default
kernel-livepatch-6_4_0-150700_53_73-default-debuginfo
python2-perf
python2-perf-debuginfo
python3-perf
python3-perf-debuginfo
perf-debuginfo
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel
kernel-rt-devel-debuginfo
kernel-rt-debugsource
gfs2-kmp-rt
ocfs2-kmp-rt
dlm-kmp-rt-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-syms-rt
ocfs2-kmp-rt-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt
kernel-rt-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-docs
kernel-syms
kernel-macros
kernel-default-livepatch-devel
kernel-default-extra
kernel-default-livepatch
kernel-azure
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-azure-devel
kernel-azure-debugsource
kernel-default-devel-debuginfo
ocfs2-kmp-default
dlm-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
kernel-default
kernel-64kb-debuginfo
kernel-64kb-devel-debuginfo
kernel-64kb-devel
kernel-64kb-debugsource
kernel-64kb
kernel-default-devel
kernel-default-debuginfo
kernel-default-debugsource
cluster-md-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default
gfs2-kmp-default
gfs2-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kernel-obs-build
kernel-obs-build-debugsource
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-base
kernel-headers
linux (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-aws-7.0 (Ubuntu package)

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-livepatch-6_4_0-150700_7_67-rt - update to 1-150700.1.5.1
kernel-livepatch-SLE15-SP7-RT_Update_18-debugsource - update to 1-150700.1.5.1
kernel-livepatch-6_4_0-150700_7_67-rt-debuginfo - update to 1-150700.1.5.1
kernel-livepatch-SLE15-SP7_Update_19-debugsource - update to 1-150700.15.3.4
kernel-livepatch-6_4_0-150700_53_73-default - update to 1-150700.15.3.4
kernel-livepatch-6_4_0-150700_53_73-default-debuginfo - update to 1-150700.15.3.4
python2-perf - update to 4.19.90-2608.2.0.0384
python2-perf-debuginfo - update to 4.19.90-2608.2.0.0384
python3-perf - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
python3-perf-debuginfo - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
perf-debuginfo - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
perf - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-tools-devel - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-tools-debuginfo - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-tools - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-source - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-devel - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-debugsource - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-debuginfo - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
bpftool-debuginfo - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
bpftool - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel - addressed in versions 4.19.90-2608.2.0.0384, 6.6.0-145.1.20.157
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.67.1
kernel-rt-debugsource - update to 6.4.0-150700.7.67.1
gfs2-kmp-rt - update to 6.4.0-150700.7.67.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.67.1
dlm-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
kernel-rt-devel - update to 6.4.0-150700.7.67.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
kernel-syms-rt - update to 6.4.0-150700.7.67.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.67.1
dlm-kmp-rt - update to 6.4.0-150700.7.67.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.67.1
kernel-devel-rt - update to 6.4.0-150700.7.67.1
kernel-source-rt - update to 6.4.0-150700.7.67.1
kernel-rt - update to 6.4.0-150700.7.67.1
kernel-docs - update to 6.4.0-150700.53.73.1
kernel-source - update to 6.4.0-150700.53.73.1
kernel-syms - update to 6.4.0-150700.53.73.1
kernel-macros - update to 6.4.0-150700.53.73.1
kernel-devel - update to 6.4.0-150700.53.73.1
kernel-default-livepatch-devel - update to 6.4.0-150700.53.73.2
kernel-default-extra - update to 6.4.0-150700.53.73.2
kernel-default-livepatch - update to 6.4.0-150700.53.73.2
kernel-azure - update to 6.4.0-150700.53.73.2
kernel-azure-debuginfo - update to 6.4.0-150700.53.73.2
kernel-azure-devel-debuginfo - update to 6.4.0-150700.53.73.2
kernel-azure-devel - update to 6.4.0-150700.53.73.2
kernel-azure-debugsource - update to 6.4.0-150700.53.73.2
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.73.2
ocfs2-kmp-default - update to 6.4.0-150700.53.73.2
dlm-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default-extra-debuginfo - update to 6.4.0-150700.53.73.2
kernel-zfcpdump - update to 6.4.0-150700.53.73.2
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.73.2
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.73.2
kernel-default - update to 6.4.0-150700.53.73.2
kernel-64kb-debuginfo - update to 6.4.0-150700.53.73.2
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.73.2
kernel-64kb-devel - update to 6.4.0-150700.53.73.2
kernel-64kb-debugsource - update to 6.4.0-150700.53.73.2
kernel-64kb - update to 6.4.0-150700.53.73.2
kernel-default-devel - update to 6.4.0-150700.53.73.2
kernel-default-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default-debugsource - update to 6.4.0-150700.53.73.2
cluster-md-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
dlm-kmp-default - update to 6.4.0-150700.53.73.2
cluster-md-kmp-default - update to 6.4.0-150700.53.73.2
gfs2-kmp-default - update to 6.4.0-150700.53.73.2
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
kernel-obs-build - update to 6.4.0-150700.53.73.2
kernel-obs-build-debugsource - update to 6.4.0-150700.53.73.2
reiserfs-kmp-default - update to 6.4.0-150700.53.73.2
reiserfs-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default-base - update to 6.4.0-150700.53.73.2.150700.17.41.4
kernel-headers - update to 6.6.0-145.1.20.157
linux (Ubuntu package) - addressed in versions 7.0.0-29.29, 7.0.0-29.29.1, 7.0.0-1009.9, 7.0.0-1010.10, 7.0.0-1011.11, 7.0.0-1016.16
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-29.29~24.04.2
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1010.10
linux-aws-7.0 (Ubuntu package) - update to 7.0.0-1010.10~24.04.1

• https://git.kernel.org/stable/c/0b9ee09d5e849591f17d98c078033dadea967293
• https://git.kernel.org/stable/c/0d64bc200ebe4f275b27438c6e593903e0b16fe1
• https://git.kernel.org/stable/c/13e91fd076306f5d0cdfa14f53d69e37274723c4
• https://git.kernel.org/stable/c/2015038195939eac54a1ee83c9d98ef1a8ccbbce
• https://git.kernel.org/stable/c/3523e53ff95f1837ec3f57ff7558532bcb2661b7
• https://git.kernel.org/stable/c/3889517c2ec7f364914aea8209abfff735f7ecde
• https://git.kernel.org/stable/c/ed77cc819ad631264787cade5ae5ec4c535ec6bb
• https://git.kernel.org/stable/c/f92a285db7ff6e598591ccbfb551be155c5f4d57

• Out-of-bounds read in Linux kernel ulp srp driver
• SUSE update for the Linux Kernel
• SUSE update for the Linux Kernel
• openEuler 24.03 LTS SP1 update for kernel
• openEuler 20.03 LTS SP4 update for kernel
• Ubuntu update for linux
• Ubuntu update for linux-oem-7.0
• Ubuntu update for linux-aws-7.0
• Ubuntu update for linux-hwe-7.0