Out-of-bounds read in Linux kernel - CVE-2026-53225

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Main Vulnerability Database Vulnerabilities #VU135540

Out-of-bounds read in Linux kernel - CVE-2026-53225

Published: June 26, 2026


Vulnerability identifier: #VU135540
CSH Severity: Medium
CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53225
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to an out-of-bounds read in __sctp_rcv_asconf_lookup() in net/sctp/input.c when processing a truncated trailing ASCONF chunk containing a declared IPv6 address parameter. A remote attacker can send a specially crafted SCTP packet to disclose sensitive information.

The issue is reachable from the no-association lookup path.


Affected software

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
Ubuntu
SUSE Linux Enterprise Live Patching
Public Cloud Module
Legacy Module
Development Tools Module
Basesystem Module
SUSE Real Time Module
openEuler
kernel-livepatch-SLE15-SP7-RT_Update_18-debugsource
kernel-livepatch-6_4_0-150700_7_67-rt-debuginfo
kernel-livepatch-6_4_0-150700_7_67-rt
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
linux (Ubuntu package)
linux-fips (Ubuntu package)
linux-aws-hwe (Ubuntu package)
linux-oracle (Ubuntu package)
linux-azure (Ubuntu package)
kernel
kernel-source
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
perf
perf-debuginfo
python2-perf
python2-perf-debuginfo
python3-perf
python3-perf-debuginfo
linux-bluefield (Ubuntu package)
linux-oracle-5.4 (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-aws-5.4 (Ubuntu package)
linux-azure-5.4 (Ubuntu package)
kernel-headers
linux-lowlatency (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-nvidia-tegra-igx (Ubuntu package)
linux-raspi (Ubuntu package)
linux-aws-5.15 (Ubuntu package)
linux-azure-fde-5.15 (Ubuntu package)
ocfs2-kmp-rt
kernel-rt-devel-debuginfo
kernel-rt
kernel-source-rt
kernel-devel-rt
kernel-rt-debuginfo
dlm-kmp-rt
cluster-md-kmp-rt
kernel-rt-debugsource
kernel-syms-rt
cluster-md-kmp-rt-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-devel
dlm-kmp-rt-debuginfo
gfs2-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms
kernel-docs
kernel-macros
ocfs2-kmp-default-debuginfo
gfs2-kmp-default-debuginfo
gfs2-kmp-default
kernel-azure-debuginfo
kernel-obs-build
cluster-md-kmp-default
kernel-obs-build-debugsource
reiserfs-kmp-default
reiserfs-kmp-default-debuginfo
kernel-default-extra-debuginfo
kernel-default-extra
kernel-default-livepatch-devel
kernel-default-livepatch
kernel-azure
kernel-64kb-debuginfo
kernel-default-debugsource
kernel-default-debuginfo
kernel-default-devel
kernel-default-devel-debuginfo
kernel-64kb
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-devel-debuginfo
dlm-kmp-default
kernel-default
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-zfcpdump
ocfs2-kmp-default
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-devel-debuginfo
kernel-default-base
linux-hwe-6.8 (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-azure-6.17 (Ubuntu package)
linux-oracle-6.17 (Ubuntu package)
linux-nvidia-6.17 (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 (Ubuntu package)
linux-nvidia-bos (Ubuntu package)

How to mitigate CVE-2026-53225

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
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-6_4_0-150700_7_67-rt - 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
linux (Ubuntu package) - addressed in versions 3.13.0.215.225, 3.13.0-215.266, 4.4.0.284.290, 4.4.0-284.318, 4.4.0-284.318~14.04.1, 4.4.0.1157.154, 4.4.0-1157.163, 4.4.0.1158.155, 4.4.0-1158.169, 4.4.0.1195.199, 4.4.0-1195.210, 4.15.0.254.238, 4.15.0-254.266, 4.15.0.1150.147, 4.15.0-1150.162, 4.15.0.1177.168, 4.15.0-1177.182, 4.15.0.1188.201~16.04.1, 4.15.0-1188.205, 4.15.0.1195.193, 4.15.0-1195.208, 4.15.0.1205.173, 4.15.0-1205.220, 4.15.0.2096.94, 4.15.0-2096.102, 4.15.0.2113.109, 4.15.0-2113.119, 4.15.0.2133.127, 4.15.0-2133.139, 5.4.0.238.230, 5.4.0-238.258, 5.4.0-238.258~18.04.1, 5.4.0-1067.70, 5.4.0.1081.81, 5.4.0-1081.85, 5.4.0-1109.114, 5.4.0-1109.114~18.04.1, 5.4.0.1109.138, 5.4.0.1137.134, 5.4.0-1137.147, 5.4.0-1146.159, 5.4.0-1146.159~18.04.1, 5.4.0.1146.177, 5.4.0.1150.146, 5.4.0-1150.159~18.04.1, 5.4.0.1161.155, 5.4.0-1161.171, 5.4.0.1163.161, 5.4.0-1163.174, 5.4.0.1168.104, 5.4.0.1168.160, 5.4.0-1168.174, 5.4.0-1168.174+fips1, 5.15.0.187.167, 5.15.0-187.197, 5.15.0.1065.65, 5.15.0-1065.67, 5.15.0-1065.67~20.04.1, 5.15.0.1076.79~20.04.1, 5.15.0-1076.80, 5.15.0.1096.95, 5.15.0-1096.104, 5.15.0.1105.101, 5.15.0-1105.107, 5.15.0.1105.109, 5.15.0-1105.110, 5.15.0.1107.104, 5.15.0.1107.111, 5.15.0-1107.111~20.04.1, 5.15.0.1108.107, 5.15.0.1108.108, 5.15.0-1108.109, 5.15.0-1108.114, 5.15.0-1108.114~20.04.1, 5.15.0-1110.116~20.04.1, 5.15.0.1112.116, 5.15.0-1112.121, 5.15.0.1113.109, 5.15.0.1113.116, 5.15.0-1113.120, 5.15.0-1113.120+fips1, 5.15.0.1118.103, 5.15.0.1118.116, 5.15.0-1118.127, 5.15.0-1118.127+fips1, 6.8.0-137.137+fips1, 6.8.0-1034.35, 6.8.0-1047.51, 6.8.0-1060.63.1, 6.8.0-1060.63~22.04.1, 6.8.0-1060.68, 6.8.0-1062.63, 6.8.0-1062.63~22.04.1, 6.8.0-1062.65, 6.8.0-1062.65+fips1, 6.8.0-1063.70, 6.8.0-1063.70~22.04.1, 6.8.0-1064.72+fips1, 6.8.0-1064.72~22.04.1, 6.8.0-1065.73, 6.8.0-1065.73+fips1, 6.8.0-1065.73~22.04.1, 6.8.1-1057.58, 6.8.1-1057.58~22.04.1, 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-fips (Ubuntu package) - addressed in versions 4.4.0.1127.129, 4.4.0-1127.134, 5.15.0.190.111, 5.15.0-190.200+fips1, 5.15.0.1110.109, 5.15.0-1110.116
linux-aws-hwe (Ubuntu package) - addressed in versions 4.15.0-254.266~16.04.1, 4.15.0-1188.205~16.04.1, 4.15.0-1195.208~16.04.1, 4.15.0-1205.220~16.04.1
linux-oracle (Ubuntu package) - addressed in versions 4.15.0.1158.163, 4.15.0-1158.169, 4.15.0-1158.169~16.04.1, 5.15.0.1110.106, 5.15.0-1110.116
linux-azure (Ubuntu package) - update to 4.15.0-1205.220~14.04.1
kernel - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-source - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-devel - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-debugsource - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
bpftool-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
bpftool - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-tools - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-tools-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
kernel-tools-devel - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
perf - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
perf-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
python2-perf - update to 4.19.90-2608.6.0.0388
python2-perf-debuginfo - update to 4.19.90-2608.6.0.0388
python3-perf - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
python3-perf-debuginfo - addressed in versions 4.19.90-2608.6.0.0388, 5.10.0-331.0.0.232
linux-bluefield (Ubuntu package) - addressed in versions 5.4.0.1123.119, 5.4.0-1123.130
linux-oracle-5.4 (Ubuntu package) - update to 5.4.0-1161.171~18.04.1
linux-aws-fips (Ubuntu package) - addressed in versions 5.4.0.1163.110, 5.4.0-1163.174+fips1
linux-aws-5.4 (Ubuntu package) - addressed in versions 5.4.0-1163.174~18.04.1, 5.4.0.1166.168, 5.4.0-1166.175, 5.4.0-1166.175~18.04.1
linux-azure-5.4 (Ubuntu package) - addressed in versions 5.4.0.1166.108, 5.4.0-1166.175+fips1, 5.4.0-1168.174~18.04.1
kernel-headers - update to 5.10.0-331.0.0.232
linux-lowlatency (Ubuntu package) - addressed in versions 5.15.0.190.157, 5.15.0-190.200, 6.8.0-137.137.1, 6.8.0-137.137.1~22.04.1, 6.8.0-1031.32, 6.8.0-1059.62
linux-azure-5.15 (Ubuntu package) - addressed in versions 5.15.0-190.200~20.04.1, 5.15.0.1114.104, 5.15.0.1114.111, 5.15.0-1114.124, 5.15.0-1114.124+fips1, 5.15.0-1119.128~20.04.1
linux-nvidia-tegra-igx (Ubuntu package) - addressed in versions 5.15.0-1054.54, 5.15.0.1054.56
linux-raspi (Ubuntu package) - addressed in versions 5.15.0.1108.106, 5.15.0-1108.111, 6.8.0-1062.66, 6.8.0-2051.53
linux-aws-5.15 (Ubuntu package) - addressed in versions 5.15.0-1114.121~20.04.1, 5.15.0-1114.124~20.04.1
linux-azure-fde-5.15 (Ubuntu package) - update to 5.15.0-1118.127~20.04.1
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-rt - update to 6.4.0-150700.7.67.1
kernel-source-rt - update to 6.4.0-150700.7.67.1
kernel-devel-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
cluster-md-kmp-rt - update to 6.4.0-150700.7.67.1
kernel-rt-debugsource - 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
gfs2-kmp-rt-debuginfo - 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-debuginfo - update to 6.4.0-150700.7.67.1
kernel-syms - update to 6.4.0-150700.53.73.1
kernel-docs - update to 6.4.0-150700.53.73.1
kernel-source - update to 6.4.0-150700.53.73.1
kernel-devel - update to 6.4.0-150700.53.73.1
kernel-macros - update to 6.4.0-150700.53.73.1
ocfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
gfs2-kmp-default-debuginfo - update to 6.4.0-150700.53.73.2
gfs2-kmp-default - update to 6.4.0-150700.53.73.2
kernel-azure-debuginfo - update to 6.4.0-150700.53.73.2
kernel-obs-build - update to 6.4.0-150700.53.73.2
cluster-md-kmp-default - 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-extra-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default-extra - update to 6.4.0-150700.53.73.2
kernel-default-livepatch-devel - 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-64kb-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default-debugsource - update to 6.4.0-150700.53.73.2
kernel-default-debuginfo - update to 6.4.0-150700.53.73.2
kernel-default-devel - update to 6.4.0-150700.53.73.2
kernel-default-devel-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
dlm-kmp-default - 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
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-azure-devel-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
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-138.138~22.04.1
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1059.62~22.04.1
linux-aws-6.8 (Ubuntu package) - update to 6.8.0-1062.65~22.04.1
linux-azure-6.17 (Ubuntu package) - addressed in versions 6.17.0-42.42+1, 6.17.0-1019.22, 6.17.0-1022.22, 6.17.0-1022.25, 6.17.0-1032.32
linux-oracle-6.17 (Ubuntu package) - update to 6.17.0-1020.20
linux-nvidia-6.17 (Ubuntu package) - update to 6.17.0-1031.31
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 (Ubuntu package) - addressed in versions 7.0.0-1016.16, 7.0.0-1016.16~24.04.1
linux-nvidia-bos (Ubuntu package) - update to 7.0.0-2016.16

External References

Related Security Bulletins