Out-of-bounds read in Linux kernel - CVE-2026-52958

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Main Vulnerability Database Vulnerabilities #VU135412

Out-of-bounds read in Linux kernel - CVE-2026-52958

Published: June 25, 2026


Vulnerability identifier: #VU135412
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-52958
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to an out-of-bounds access in osdmap_decode() when decoding a corrupted incoming osdmap message. A remote attacker can send a specially crafted osdmap message to cause a denial of service.

The issue can occur when the max_osd value in the message exceeds the actual content of the osdmap.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Workstation Extension 15
SUSE Linux Enterprise Live Patching
SUSE Real Time Module
Basesystem Module
Development Tools Module
Legacy Module
Public Cloud Module
openSUSE Leap
Ubuntu
kernel-livepatch-SLE15-SP6_Update_29-debugsource
kernel-livepatch-6_4_0-150600_23_125-default
kernel-livepatch-6_4_0-150600_23_125-default-debuginfo
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-6_4_0-150700_53_73-default-debuginfo
kernel-livepatch-SLE15-SP7_Update_19-debugsource
kernel-livepatch-6_4_0-150700_53_73-default
linux (Ubuntu package)
linux-aws (Ubuntu package)
linux-nvidia-tegra (Ubuntu package)
linux-nvidia-tegra-5.15 (Ubuntu package)
linux-intel-iot-realtime (Ubuntu package)
linux-intel-iotg (Ubuntu package)
linux-azure (Ubuntu package)
linux-azure-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-fde (Ubuntu package)
kernel-obs-qa
kernel-default-extra
gfs2-kmp-default
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-devel
kernel-kvmsmall-debuginfo
kernel-kvmsmall-debugsource
kernel-source-vanilla
kernel-macros
kernel-devel
kernel-docs-html
kernel-source
kernel-zfcpdump
gfs2-kmp-default-debuginfo
kernel-debug-vdso-debuginfo
kernel-default-devel-debuginfo
kernel-64kb
kernel-default-vdso-debuginfo
kernel-debug-vdso
kernel-default-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-debug
kernel-default-livepatch-devel
kernel-docs
dtb-aarch64
kernel-debug-debuginfo
kernel-debug-devel
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-default
kernel-kvmsmall
kernel-64kb-optional-debuginfo
dtb-sprd
kernel-64kb-debuginfo
dtb-amd
dtb-amlogic
cluster-md-kmp-64kb-debuginfo
dtb-amazon
dlm-kmp-64kb
kselftests-kmp-64kb-debuginfo
kernel-64kb-extra-debuginfo
dtb-lg
dtb-apm
dtb-qcom
cluster-md-kmp-64kb
dtb-hisilicon
gfs2-kmp-64kb-debuginfo
dtb-allwinner
ocfs2-kmp-64kb
dtb-renesas
dtb-arm
kernel-64kb-devel-debuginfo
dtb-broadcom
kernel-64kb-debugsource
ocfs2-kmp-64kb-debuginfo
reiserfs-kmp-default-debuginfo
reiserfs-kmp-64kb-debuginfo
ocfs2-kmp-default
kernel-64kb-extra
dtb-mediatek
dtb-altera
kselftests-kmp-64kb
dtb-xilinx
kernel-64kb-optional
dtb-nvidia
dlm-kmp-default
dtb-freescale
dtb-rockchip
dlm-kmp-64kb-debuginfo
gfs2-kmp-64kb
dtb-socionext
kernel-default-livepatch
kernel-default-extra-debuginfo
kernel-default-optional-debuginfo
kselftests-kmp-default
kernel-default-devel
kernel-default-debuginfo
dtb-exynos
reiserfs-kmp-default
kernel-obs-build-debugsource
kernel-default-debugsource
kernel-obs-build
cluster-md-kmp-default-debuginfo
ocfs2-kmp-default-debuginfo
kselftests-kmp-default-debuginfo
kernel-syms
kernel-default-optional
dlm-kmp-default-debuginfo
cluster-md-kmp-default
dtb-cavium
dtb-apple
dtb-marvell
kernel-64kb-devel
reiserfs-kmp-64kb
kernel-default-base
kernel-default-base-rebuild
cluster-md-kmp-rt-debuginfo
kernel-rt-devel-debuginfo
ocfs2-kmp-rt
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
kernel-syms-rt
ocfs2-kmp-rt-debuginfo
kernel-rt-debugsource
cluster-md-kmp-rt
dlm-kmp-rt
kernel-rt-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt
kernel-azure-devel
kernel-azure-debugsource
kernel-azure-debuginfo
kernel-azure-devel-debuginfo
kernel-azure
linux-fips (Ubuntu package)
linux-hwe-6.8 (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oracle-6.8 (Ubuntu package)
linux-nvidia (Ubuntu package)
linux-aws-6.8 (Ubuntu package)
linux-azure-fde-6.8 (Ubuntu package)
linux-gcp-fips (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

How to mitigate CVE-2026-52958

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kernel-livepatch-SLE15-SP6_Update_29-debugsource - update to 1-150600.13.7.1
kernel-livepatch-6_4_0-150600_23_125-default - update to 1-150600.13.7.1
kernel-livepatch-6_4_0-150600_23_125-default-debuginfo - update to 1-150600.13.7.1
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-6_4_0-150700_53_73-default-debuginfo - update to 1-150700.15.3.4
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
linux (Ubuntu package) - addressed in versions 5.15.0.184.155, 5.15.0-184.194, 5.15.0-184.194~20.04.1, 5.15.0.186.166, 5.15.0-186.196, 5.15.0-186.196~20.04.1, 5.15.0.1075.78, 5.15.0-1075.79, 5.15.0.1095.94, 5.15.0-1095.103, 5.15.0.1104.100, 5.15.0-1104.109, 5.15.0.1108.107, 5.15.0-1108.114, 5.15.0.1111.115, 5.15.0-1111.120+fips1, 5.15.0.1112.102, 5.15.0.1112.109, 5.15.0-1112.122, 5.15.0-1112.122+fips1, 6.8.0-136.136, 6.8.0-1046.50, 6.8.0-1059.67, 6.8.0-1064.72, 6.8.0-1064.72~22.04.1, 6.8.1-1056.57, 6.8.1-1056.57~22.04.2, 7.0.0-28.28, 7.0.0-28.28.1, 7.0.0-1003.4, 7.0.0-1008.8
linux-aws (Ubuntu package) - addressed in versions 5.15.0.186.109, 5.15.0-186.196+fips1, 5.15.0.1106.103, 5.15.0-1106.110, 5.15.0.1107.107, 5.15.0-1107.108, 5.15.0.1112.108, 5.15.0.1112.115, 5.15.0-1112.119, 5.15.0-1112.119+fips1, 5.15.0-1112.119~20.04.1, 6.8.0-1061.64+1, 7.0.0-1009.9, 7.0.0-1015.15
linux-nvidia-tegra (Ubuntu package) - addressed in versions 5.15.0-1053.53, 5.15.0.1053.55, 5.15.0.1064.64, 5.15.0-1064.66
linux-nvidia-tegra-5.15 (Ubuntu package) - update to 5.15.0-1064.66~20.04.1
linux-intel-iot-realtime (Ubuntu package) - addressed in versions 5.15.0-1104.106, 5.15.0.1104.108, 5.15.0-1107.113~20.04.1
linux-intel-iotg (Ubuntu package) - addressed in versions 5.15.0.1107.106, 5.15.0-1107.113
linux-azure (Ubuntu package) - addressed in versions 5.15.0.1109.105, 5.15.0-1109.115, 5.15.0.1117.115, 5.15.0-1117.126, 6.8.0-1063.71, 6.8.0-1063.71~22.04.1, 7.0.0-1009.9, 7.0.0-1010.10
linux-azure-5.15 (Ubuntu package) - addressed in versions 5.15.0-1109.115~20.04.1, 5.15.0-1117.126~20.04.1, 5.15.0-1117.126~20.04.2
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1117.102, 5.15.0-1117.126+fips1, 6.8.0-1063.71+fips2
linux-azure-fde (Ubuntu package) - addressed in versions 5.15.0-1117.126, 6.8.0-1062.69
kernel-obs-qa - update to 6.4.0-150600.23.125.1
kernel-default-extra - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
gfs2-kmp-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.125.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.125.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.125.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.125.1
kernel-source-vanilla - update to 6.4.0-150600.23.125.1
kernel-macros - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.1
kernel-devel - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.1
kernel-docs-html - update to 6.4.0-150600.23.125.1
kernel-source - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.1
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
gfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.125.1
kernel-default-devel-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-64kb - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.125.1
kernel-debug-vdso - update to 6.4.0-150600.23.125.1
kernel-default-vdso - update to 6.4.0-150600.23.125.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.125.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.125.1
kernel-zfcpdump-debugsource - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-zfcpdump-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-debug - update to 6.4.0-150600.23.125.1
kernel-default-livepatch-devel - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-docs - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.1
dtb-aarch64 - update to 6.4.0-150600.23.125.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.125.1
kernel-debug-devel - update to 6.4.0-150600.23.125.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.125.1
kernel-debug-debugsource - update to 6.4.0-150600.23.125.1
kernel-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-kvmsmall - update to 6.4.0-150600.23.125.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.125.1
dtb-sprd - update to 6.4.0-150600.23.125.1
kernel-64kb-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
dtb-amd - update to 6.4.0-150600.23.125.1
dtb-amlogic - update to 6.4.0-150600.23.125.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
dtb-amazon - update to 6.4.0-150600.23.125.1
dlm-kmp-64kb - update to 6.4.0-150600.23.125.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.125.1
dtb-lg - update to 6.4.0-150600.23.125.1
dtb-apm - update to 6.4.0-150600.23.125.1
dtb-qcom - update to 6.4.0-150600.23.125.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.125.1
dtb-hisilicon - update to 6.4.0-150600.23.125.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
dtb-allwinner - update to 6.4.0-150600.23.125.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.125.1
dtb-renesas - update to 6.4.0-150600.23.125.1
dtb-arm - update to 6.4.0-150600.23.125.1
kernel-64kb-devel-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
dtb-broadcom - update to 6.4.0-150600.23.125.1
kernel-64kb-debugsource - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
ocfs2-kmp-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-64kb-extra - update to 6.4.0-150600.23.125.1
dtb-mediatek - update to 6.4.0-150600.23.125.1
dtb-altera - update to 6.4.0-150600.23.125.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.125.1
dtb-xilinx - update to 6.4.0-150600.23.125.1
kernel-64kb-optional - update to 6.4.0-150600.23.125.1
dtb-nvidia - update to 6.4.0-150600.23.125.1
dlm-kmp-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
dtb-freescale - update to 6.4.0-150600.23.125.1
dtb-rockchip - update to 6.4.0-150600.23.125.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.125.1
dtb-socionext - update to 6.4.0-150600.23.125.1
kernel-default-livepatch - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-extra-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.125.1
kselftests-kmp-default - update to 6.4.0-150600.23.125.1
kernel-default-devel - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
dtb-exynos - update to 6.4.0-150600.23.125.1
reiserfs-kmp-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-obs-build-debugsource - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-debugsource - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-obs-build - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
cluster-md-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
ocfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.125.1
kernel-syms - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.1
kernel-default-optional - update to 6.4.0-150600.23.125.1
dlm-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
cluster-md-kmp-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
dtb-cavium - update to 6.4.0-150600.23.125.1
dtb-apple - update to 6.4.0-150600.23.125.1
dtb-marvell - update to 6.4.0-150600.23.125.1
kernel-64kb-devel - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
reiserfs-kmp-64kb - update to 6.4.0-150600.23.125.1
kernel-default-base - addressed in versions 6.4.0-150600.23.125.1.150600.12.58.3, 6.4.0-150700.53.73.2.150700.17.41.4
kernel-default-base-rebuild - update to 6.4.0-150600.23.125.1.150600.12.58.3
cluster-md-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
kernel-rt-devel-debuginfo - update to 6.4.0-150700.7.67.1
ocfs2-kmp-rt - update to 6.4.0-150700.7.67.1
gfs2-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
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
kernel-rt-debugsource - 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-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-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 - update to 6.4.0-150700.53.73.2
linux-fips (Ubuntu package) - addressed in versions 6.8.0-136.136+fips2, 6.8.0-136.136.2, 6.8.0-136.136.2~22.04.1, 6.8.0-1058.61
linux-hwe-6.8 (Ubuntu package) - update to 6.8.0-136.136~22.04.1
linux-ibm (Ubuntu package) - addressed in versions 6.8.0-1030.31, 6.8.0-1033.34, 6.8.0-1061.62, 6.8.0-1061.62~22.04.1, 7.0.0-1008.8, 7.0.0-1010.10
linux-oracle-6.8 (Ubuntu package) - update to 6.8.0-1058.61~22.04.1
linux-nvidia (Ubuntu package) - addressed in versions 6.8.0-1059.62, 6.8.0-1059.62.1, 6.8.0-1059.62~22.04.1
linux-aws-6.8 (Ubuntu package) - addressed in versions 6.8.0-1061.64+fips1, 6.8.0-1061.64~22.04.1
linux-azure-fde-6.8 (Ubuntu package) - update to 6.8.0-1062.69~22.04.1
linux-gcp-fips (Ubuntu package) - update to 6.8.0-1064.72+fips1
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9

External References

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