Use-after-free in Linux kernel - CVE-2026-52912

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Main Vulnerability Database Vulnerabilities #VU135661

Use-after-free in Linux kernel - CVE-2026-52912

Published: June 26, 2026


Vulnerability identifier: #VU135661
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-2026-52912
CWE-ID: CWE-416
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 a use-after-free in nf_queue when reinjecting queued bridge LOCAL_IN packets. A remote attacker can trigger packet queueing and later reinjection to cause a denial of service.

The issue occurs because skb->dev can still reference a freed bridge master device while the packet remains queued.


Affected software

Linux kernel
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Availability Extension 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Manager Server
SUSE Manager Retail Branch Server
SUSE Manager Proxy
SUSE Linux Enterprise Micro
SUSE Linux Enterprise Micro for Rancher
Red Hat Enterprise Linux for Real Time for NFV
Red Hat Enterprise Linux for Real Time
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux for x86_64
SUSE Linux Enterprise Live Patching
openSUSE Leap
Ubuntu
openEuler
kgraft-patch-4_12_14-122_328-default
kernel-livepatch-SLE15-SP4_Update_59-debugsource
kernel-livepatch-5_14_21-150400_24_240-default
kernel-livepatch-5_14_21-150400_24_240-default-debuginfo
kernel-livepatch-SLE15-SP6_Update_31-debugsource
kernel-livepatch-6_4_0-150600_23_135-default-debuginfo
kernel-livepatch-6_4_0-150600_23_135-default
kernel-source
ocfs2-kmp-default-debuginfo
gfs2-kmp-default
kernel-default
cluster-md-kmp-default
kernel-default-devel
kernel-default-base
kernel-default-devel-debuginfo
kernel-default-base-debuginfo
kernel-devel
kernel-macros
gfs2-kmp-default-debuginfo
dlm-kmp-default
ocfs2-kmp-default
kernel-default-debugsource
dlm-kmp-default-debuginfo
cluster-md-kmp-default-debuginfo
kernel-syms
kernel-default-kgraft
kernel-default-debuginfo
kernel-default-kgraft-devel
kernel-default-man
kernel-rt (Red Hat package)
kernel
perf-debuginfo
python3-perf
perf
kernel-tools-devel
kernel-tools-debuginfo
kernel-tools
python3-perf-debuginfo
kernel-headers
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
bpftool
kernel (Red Hat package)
kernel-source-rt
kernel-rt-debugsource
kernel-rt-debuginfo
kernel-rt
kernel-docs
kernel-obs-build-debugsource
kernel-obs-build
kernel-default-livepatch
kernel-default-livepatch-devel
kernel-zfcpdump
kernel-zfcpdump-debuginfo
kernel-zfcpdump-debugsource
reiserfs-kmp-default-debuginfo
reiserfs-kmp-default
kernel-64kb
kernel-64kb-debugsource
kernel-64kb-devel
kernel-64kb-devel-debuginfo
kernel-64kb-debuginfo
kernel-rt_debug
kernel-rt-livepatch
kernel-devel-rt
kernel-rt_debug-debugsource
ocfs2-kmp-rt
cluster-md-kmp-rt-debuginfo
cluster-md-kmp-rt
dlm-kmp-rt-debuginfo
kernel-rt-optional-debuginfo
kernel-rt_debug-devel
kernel-rt_debug-debuginfo
gfs2-kmp-rt-debuginfo
kernel-rt-optional
kselftests-kmp-rt
ocfs2-kmp-rt-debuginfo
kernel-syms-rt
kernel-rt-devel
kernel-rt-livepatch-devel
kernel-rt-extra-debuginfo
reiserfs-kmp-rt-debuginfo
kernel-rt_debug-devel-debuginfo
kernel-rt-extra
kernel-rt_debug-vdso
kernel-rt-vdso
gfs2-kmp-rt
kernel-rt-vdso-debuginfo
dlm-kmp-rt
kselftests-kmp-rt-debuginfo
reiserfs-kmp-rt
kernel-rt_debug-vdso-debuginfo
kernel-rt-devel-debuginfo
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-gcp-5.15 (Ubuntu package)
linux-azure-fips (Ubuntu package)
linux-azure-fde (Ubuntu package)
reiserfs-kmp-64kb
kselftests-kmp-64kb-debuginfo
gfs2-kmp-64kb
dlm-kmp-64kb-debuginfo
ocfs2-kmp-64kb-debuginfo
dlm-kmp-64kb
reiserfs-kmp-64kb-debuginfo
kernel-64kb-extra
cluster-md-kmp-64kb-debuginfo
kernel-64kb-extra-debuginfo
kernel-kvmsmall
kernel-default-vdso-debuginfo
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-debug-devel
kernel-debug-debuginfo
kernel-kvmsmall-vdso-debuginfo
kernel-debug-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-default-vdso
kselftests-kmp-64kb
kernel-debug-vdso
kernel-kvmsmall-devel
kernel-kvmsmall-debugsource
kernel-kvmsmall-devel-debuginfo
kernel-kvmsmall-debuginfo
kernel-docs-html
kernel-source-vanilla
ocfs2-kmp-64kb
cluster-md-kmp-64kb
kernel-64kb-optional-debuginfo
gfs2-kmp-64kb-debuginfo
kernel-64kb-optional
kselftests-kmp-default
kernel-default-optional
kernel-default-extra
kselftests-kmp-default-debuginfo
kernel-default-optional-debuginfo
kernel-obs-qa
kernel-default-extra-debuginfo
kernel-debug
kernel-default-base-rebuild
linux-lowlatency (Ubuntu package)
linux-oracle (Ubuntu package)
linux-aws-fips (Ubuntu package)
linux-ibm (Ubuntu package)
linux-oem-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-2026-52912

Install security update from vendor's repository.

Linux kernel - update to 7.0 rc3
kgraft-patch-4_12_14-122_328-default - update to 1-8.5.1
kernel-livepatch-SLE15-SP4_Update_59-debugsource - update to 1-150400.9.5.1
kernel-livepatch-5_14_21-150400_24_240-default - update to 1-150400.9.5.1
kernel-livepatch-5_14_21-150400_24_240-default-debuginfo - update to 1-150400.9.5.1
kernel-livepatch-SLE15-SP6_Update_31-debugsource - update to 1-150600.13.3.4
kernel-livepatch-6_4_0-150600_23_135-default-debuginfo - update to 1-150600.13.3.4
kernel-livepatch-6_4_0-150600_23_135-default - update to 1-150600.13.3.4
kernel-source - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.1, 6.4.0-150600.23.135.1
ocfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
gfs2-kmp-default - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-default - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
cluster-md-kmp-default - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-default-devel - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-default-base - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2.150400.24.120.2, 6.4.0-150600.23.135.1.150600.12.62.4
kernel-default-devel-debuginfo - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-default-base-debuginfo - update to 4.12.14-122.328.1
kernel-devel - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.1, 6.4.0-150600.23.135.1
kernel-macros - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.1, 6.4.0-150600.23.135.1
gfs2-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
dlm-kmp-default - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
ocfs2-kmp-default - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-default-debugsource - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
dlm-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
cluster-md-kmp-default-debuginfo - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-syms - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.1, 6.4.0-150600.23.135.1
kernel-default-kgraft - update to 4.12.14-122.328.1
kernel-default-debuginfo - addressed in versions 4.12.14-122.328.1, 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-default-kgraft-devel - update to 4.12.14-122.328.1
kernel-default-man - update to 4.12.14-122.328.1
kernel-rt (Red Hat package) - update to 4.18.0-553.168.1.rt7.509.el8_10
kernel - update to 5.10.0-326.0.0.227
perf-debuginfo - update to 5.10.0-326.0.0.227
python3-perf - update to 5.10.0-326.0.0.227
perf - update to 5.10.0-326.0.0.227
kernel-tools-devel - update to 5.10.0-326.0.0.227
kernel-tools-debuginfo - update to 5.10.0-326.0.0.227
kernel-tools - update to 5.10.0-326.0.0.227
python3-perf-debuginfo - update to 5.10.0-326.0.0.227
kernel-source - update to 5.10.0-326.0.0.227
kernel-headers - update to 5.10.0-326.0.0.227
kernel-devel - update to 5.10.0-326.0.0.227
kernel-debugsource - update to 5.10.0-326.0.0.227
kernel-debuginfo - update to 5.10.0-326.0.0.227
bpftool-debuginfo - update to 5.10.0-326.0.0.227
bpftool - update to 5.10.0-326.0.0.227
kernel (Red Hat package) - update to 5.14.0-687.52.1.el9_8
kernel-source-rt - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-rt-debugsource - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-rt-debuginfo - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-rt - addressed in versions 5.14.21-150400.15.186.1, 5.14.21-150500.13.161.1
kernel-docs - addressed in versions 5.14.21-150400.24.240.1, 6.4.0-150600.23.135.1
kernel-obs-build-debugsource - addressed in versions 5.14.21-150400.24.240.1, 6.4.0-150600.23.135.1
kernel-obs-build - addressed in versions 5.14.21-150400.24.240.1, 6.4.0-150600.23.135.1
kernel-default-livepatch - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-default-livepatch-devel - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-zfcpdump - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-zfcpdump-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-zfcpdump-debugsource - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
reiserfs-kmp-default-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
reiserfs-kmp-default - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-64kb - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-64kb-debugsource - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-64kb-devel - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-64kb-devel-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-64kb-debuginfo - addressed in versions 5.14.21-150400.24.240.2, 6.4.0-150600.23.135.1
kernel-rt_debug - update to 5.14.21-150500.13.161.1
kernel-rt-livepatch - update to 5.14.21-150500.13.161.1
kernel-devel-rt - update to 5.14.21-150500.13.161.1
kernel-rt_debug-debugsource - update to 5.14.21-150500.13.161.1
ocfs2-kmp-rt - update to 5.14.21-150500.13.161.1
cluster-md-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
cluster-md-kmp-rt - update to 5.14.21-150500.13.161.1
dlm-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-optional-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt_debug-devel - update to 5.14.21-150500.13.161.1
kernel-rt_debug-debuginfo - update to 5.14.21-150500.13.161.1
gfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-optional - update to 5.14.21-150500.13.161.1
kselftests-kmp-rt - update to 5.14.21-150500.13.161.1
ocfs2-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-syms-rt - update to 5.14.21-150500.13.161.1
kernel-rt-devel - update to 5.14.21-150500.13.161.1
kernel-rt-livepatch-devel - update to 5.14.21-150500.13.161.1
kernel-rt-extra-debuginfo - update to 5.14.21-150500.13.161.1
reiserfs-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt_debug-devel-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-extra - update to 5.14.21-150500.13.161.1
kernel-rt_debug-vdso - update to 5.14.21-150500.13.161.1
kernel-rt-vdso - update to 5.14.21-150500.13.161.1
gfs2-kmp-rt - update to 5.14.21-150500.13.161.1
kernel-rt-vdso-debuginfo - update to 5.14.21-150500.13.161.1
dlm-kmp-rt - update to 5.14.21-150500.13.161.1
kselftests-kmp-rt-debuginfo - update to 5.14.21-150500.13.161.1
reiserfs-kmp-rt - update to 5.14.21-150500.13.161.1
kernel-rt_debug-vdso-debuginfo - update to 5.14.21-150500.13.161.1
kernel-rt-devel-debuginfo - update to 5.14.21-150500.13.161.1
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, 6.8.0-139.139+fips1, 6.8.0-1049.53, 6.8.0-1062.65+fips1, 6.8.0-1062.65.1, 6.8.0-1062.65~22.04.1, 6.8.0-1062.70, 6.8.0-1064.68, 6.8.0-1067.75, 6.8.0-1067.75+fips1, 6.8.1-1059.60, 6.8.1-1059.60~22.04.1, 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, 6.8.0-1064.67~22.04.1, 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, 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-gcp-5.15 (Ubuntu package) - update to 5.15.0-1112.122~20.04.1
linux-azure-fips (Ubuntu package) - addressed in versions 5.15.0.1117.102, 5.15.0-1117.126+fips1
linux-azure-fde (Ubuntu package) - update to 5.15.0-1117.126
reiserfs-kmp-64kb - update to 6.4.0-150600.23.135.1
kselftests-kmp-64kb-debuginfo - update to 6.4.0-150600.23.135.1
gfs2-kmp-64kb - update to 6.4.0-150600.23.135.1
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.135.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.135.1
dlm-kmp-64kb - update to 6.4.0-150600.23.135.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.135.1
kernel-64kb-extra - update to 6.4.0-150600.23.135.1
cluster-md-kmp-64kb-debuginfo - update to 6.4.0-150600.23.135.1
kernel-64kb-extra-debuginfo - update to 6.4.0-150600.23.135.1
kernel-kvmsmall - update to 6.4.0-150600.23.135.1
kernel-default-vdso-debuginfo - update to 6.4.0-150600.23.135.1
kernel-debug-devel-debuginfo - update to 6.4.0-150600.23.135.1
kernel-debug-debugsource - update to 6.4.0-150600.23.135.1
kernel-debug-devel - update to 6.4.0-150600.23.135.1
kernel-debug-debuginfo - update to 6.4.0-150600.23.135.1
kernel-kvmsmall-vdso-debuginfo - update to 6.4.0-150600.23.135.1
kernel-debug-vdso-debuginfo - update to 6.4.0-150600.23.135.1
kernel-kvmsmall-vdso - update to 6.4.0-150600.23.135.1
kernel-default-vdso - update to 6.4.0-150600.23.135.1
kselftests-kmp-64kb - update to 6.4.0-150600.23.135.1
kernel-debug-vdso - update to 6.4.0-150600.23.135.1
kernel-kvmsmall-devel - update to 6.4.0-150600.23.135.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.135.1
kernel-kvmsmall-devel-debuginfo - update to 6.4.0-150600.23.135.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.135.1
kernel-docs-html - update to 6.4.0-150600.23.135.1
kernel-source-vanilla - update to 6.4.0-150600.23.135.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.135.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.135.1
kernel-64kb-optional-debuginfo - update to 6.4.0-150600.23.135.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.135.1
kernel-64kb-optional - update to 6.4.0-150600.23.135.1
kselftests-kmp-default - update to 6.4.0-150600.23.135.1
kernel-default-optional - update to 6.4.0-150600.23.135.1
kernel-default-extra - update to 6.4.0-150600.23.135.1
kselftests-kmp-default-debuginfo - update to 6.4.0-150600.23.135.1
kernel-default-optional-debuginfo - update to 6.4.0-150600.23.135.1
kernel-obs-qa - update to 6.4.0-150600.23.135.1
kernel-default-extra-debuginfo - update to 6.4.0-150600.23.135.1
kernel-debug - update to 6.4.0-150600.23.135.1
kernel-default-base-rebuild - update to 6.4.0-150600.23.135.1.150600.12.62.4
linux-lowlatency (Ubuntu package) - addressed in versions 6.8.0-139.139.1, 6.8.0-139.139.1~22.04.1
linux-oracle (Ubuntu package) - addressed in versions 6.8.0-1061.64, 6.8.0-1061.64~22.04.1
linux-aws-fips (Ubuntu package) - update to 6.8.0-1064.67+fips1
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9
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