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

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Main Vulnerability Database Vulnerabilities #VU135591

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

Published: June 26, 2026


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

Vulnerability details

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.


Affected software

Linux kernel
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
Public Cloud Module
Development Tools Module
Basesystem Module
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Legacy 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
kernel-devel
kernel
bpftool
bpftool-debuginfo
kernel-debuginfo
kernel-debugsource
kernel-source
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python2-perf
python2-perf-debuginfo
python3-perf
python3-perf-debuginfo
linux-fips (Ubuntu package)
linux-aws (Ubuntu package)
linux (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-ibm-5.15 (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
cluster-md-kmp-rt
kernel-rt-debuginfo
dlm-kmp-rt
gfs2-kmp-rt-debuginfo
kernel-rt-debugsource
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
cluster-md-kmp-rt-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-rt-devel
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt
kernel-rt-devel-debuginfo
kernel-macros
kernel-docs
kernel-syms
kernel-default-devel-debuginfo
kernel-obs-build-debugsource
kernel-default-debugsource
kernel-obs-build
kernel-azure-debugsource
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-azure-devel
kernel-default-livepatch-devel
kernel-default-devel
kernel-default-debuginfo
kernel-default-livepatch
kernel-azure
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
gfs2-kmp-default-debuginfo
kernel-64kb
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-default
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
ocfs2-kmp-default
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
dlm-kmp-default
cluster-md-kmp-default
gfs2-kmp-default
ocfs2-kmp-default-debuginfo
kernel-default-base
kernel-headers
linux-nvidia (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-hwe-7.0 (Ubuntu package)
linux-gcp (Ubuntu package)
linux-oem-7.0 (Ubuntu package)
linux-aws-7.0 (Ubuntu package)
linux-oracle-7.0 (Ubuntu package)
linux-gcp-7.0 (Ubuntu package)
linux-azure-7.0 (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

How to mitigate CVE-2026-53186

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
kernel-devel - 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
bpftool - 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
kernel-debuginfo - 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-source - 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-tools-debuginfo - 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
perf - 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
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
linux-fips (Ubuntu package) - addressed in versions 5.15.0.194.113, 5.15.0-194.204+fips1
linux-aws (Ubuntu package) - addressed in versions 5.15.0.194.159, 5.15.0-194.204, 5.15.0-194.204~20.04.1, 5.15.0.1079.82, 5.15.0-1079.83, 5.15.0.1099.98, 5.15.0-1099.107, 5.15.0.1108.104, 5.15.0-1108.110, 5.15.0.1108.112, 5.15.0-1108.113, 5.15.0.1110.107, 5.15.0-1110.114, 5.15.0.1111.110, 5.15.0-1111.117, 5.15.0.1112.111, 5.15.0-1112.118, 5.15.0.1113.109, 5.15.0-1113.119, 5.15.0.1115.119, 5.15.0-1115.124, 5.15.0.1116.106, 5.15.0.1116.112, 5.15.0.1116.119, 5.15.0-1116.123, 5.15.0-1116.123+fips1, 5.15.0-1116.126+fips1, 5.15.0.1117.114, 5.15.0-1117.127, 5.15.0-1121.130, 5.15.0.1122.106, 5.15.0.1122.120, 5.15.0-1122.131, 5.15.0-1122.131+fips1, 6.8.0-1065.68, 6.8.0-1065.68~22.04.1
linux (Ubuntu package) - addressed in versions 5.15.0.194.171, 5.15.0-194.204, 5.15.0.1111.111, 5.15.0-1111.112, 6.8.0-142.142+fips1, 6.8.0-142.142.1, 6.8.0-142.142.1~22.04.1, 6.8.0-1050.54, 6.8.0-1062.65~22.04.1, 6.8.0-1064.72+fips1, 6.8.0-1065.66, 6.8.0-1065.69, 6.8.0-1066.73, 6.8.0-1066.73~22.04.1, 6.8.0-1068.76, 6.8.0-1068.76+fips1, 6.8.0-1068.76~22.04.1, 6.8.0-1069.77, 6.8.0-1069.77~22.04.1, 6.8.0-2054.56, 6.8.1-1060.61, 6.8.1-1060.61~22.04.1, 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-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1057.57, 5.15.0.1057.59, 5.15.0.1068.68, 5.15.0-1068.70, 6.8.0-1035.38
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1068.70~20.04.1
linux-ibm-5.15 (Ubuntu package) - update to 5.15.0-1110.114~20.04.1
linux-aws-5.15 (Ubuntu package) - addressed in versions 5.15.0-1111.117~20.04.1, 5.15.0-1116.123~20.04.1, 5.15.0-1121.130~20.04.1, 5.15.0-1122.131~20.04.1
cluster-md-kmp-rt - update to 6.4.0-150700.7.67.1
kernel-rt-debuginfo - update to 6.4.0-150700.7.67.1
dlm-kmp-rt - update to 6.4.0-150700.7.67.1
gfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
kernel-rt-debugsource - update to 6.4.0-150700.7.67.1
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
kernel-syms-rt - update to 6.4.0-150700.7.67.1
cluster-md-kmp-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-rt-devel - update to 6.4.0-150700.7.67.1
dlm-kmp-rt-debuginfo - 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
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.67.1
kernel-devel - update to 6.4.0-150700.53.73.1
kernel-macros - update to 6.4.0-150700.53.73.1
kernel-source - update to 6.4.0-150700.53.73.1
kernel-docs - update to 6.4.0-150700.53.73.1
kernel-syms - update to 6.4.0-150700.53.73.1
kernel-default-devel-debuginfo - update to 6.4.0-150700.53.73.2
kernel-obs-build-debugsource - update to 6.4.0-150700.53.73.2
kernel-default-debugsource - update to 6.4.0-150700.53.73.2
kernel-obs-build - update to 6.4.0-150700.53.73.2
kernel-azure-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-extra-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default-extra - update to 6.4.0-150700.53.73.2
kernel-azure-devel - update to 6.4.0-150700.53.73.2
kernel-default-livepatch-devel - 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-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
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
kernel-64kb - update to 6.4.0-150700.53.73.2
kernel-64kb-debugsource - update to 6.4.0-150700.53.73.2
kernel-64kb-devel - update to 6.4.0-150700.53.73.2
kernel-64kb-devel-debuginfo - update to 6.4.0-150700.53.73.2
kernel-64kb-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default - update to 6.4.0-150700.53.73.2
kernel-zfcpdump-debugsource - update to 6.4.0-150700.53.73.2
kernel-zfcpdump-debuginfo - update to 6.4.0-150700.53.73.2
kernel-zfcpdump - 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
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
ocfs2-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-nvidia (Ubuntu package) - addressed in versions 6.8.0-1063.66, 6.8.0-1063.66.1, 6.8.0-1063.66~22.04.1, 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-aws-fips (Ubuntu package) - update to 6.8.0-1065.68+fips1
linux-hwe-7.0 (Ubuntu package) - update to 7.0.0-29.29~24.04.2
linux-gcp (Ubuntu package) - addressed in versions 7.0.0-1005.6, 7.0.0-1010.10
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
linux-oracle-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-gcp-7.0 (Ubuntu package) - update to 7.0.0-1011.11~24.04.1
linux-azure-7.0 (Ubuntu package) - update to 7.0.0-1014.14~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

External References

Related Security Bulletins