Use-after-free in Linux kernel - CVE-2026-53357

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Main Vulnerability Database Vulnerabilities #VU136810

Use-after-free in Linux kernel - CVE-2026-53357

Published: July 2, 2026


Vulnerability identifier: #VU136810
CSH Severity: Low
CVSS v4: 6.8 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-53357
CWE-ID: CWE-416
Exploitation vector: Local access
Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a use-after-free in l2cap_sock_cleanup_listen() and bt_accept_dequeue() in the Bluetooth L2CAP socket handling code when racing listen socket cleanup with a concurrent HCI disconnect. A local user can trigger a listen/close versus HCI-disconnect race to cause a denial of service.

The issue occurs during cleanup of not-yet-accepted child sockets on a listening socket.


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
openEuler
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-SLE15-SP7_Update_19-debugsource
kernel-livepatch-6_4_0-150700_53_73-default
kernel-livepatch-6_4_0-150700_53_73-default-debuginfo
bpftool
kernel
python3-perf-debuginfo
python3-perf
perf
kernel-source
kernel-headers
kernel-devel
kernel-debugsource
kernel-debuginfo
bpftool-debuginfo
perf-debuginfo
kernel-tools
kernel-tools-debuginfo
kernel-tools-devel
gfs2-kmp-default
kernel-default-extra
kernel-obs-qa
gfs2-kmp-default-debuginfo
kernel-default-devel-debuginfo
reiserfs-kmp-default-debuginfo
ocfs2-kmp-default
cluster-md-kmp-default
gfs2-kmp-64kb
dlm-kmp-default-debuginfo
kernel-kvmsmall-devel-debuginfo
reiserfs-kmp-default
dtb-socionext
kernel-default-livepatch
kernel-default-extra-debuginfo
kernel-default-optional-debuginfo
kselftests-kmp-default
kernel-default-devel
kernel-default-debuginfo
dlm-kmp-default
kernel-default-optional
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-debug-devel
kernel-default-vdso-debuginfo
kernel-debug-vdso
kernel-default-vdso
kernel-kvmsmall-vdso-debuginfo
kernel-kvmsmall-vdso
kernel-debug-vdso-debuginfo
kernel-zfcpdump-debugsource
kernel-zfcpdump-debuginfo
kernel-debug
kernel-64kb
kernel-docs
dtb-aarch64
kernel-debug-debuginfo
kernel-kvmsmall-devel
kernel-debug-devel-debuginfo
kernel-debug-debugsource
kernel-default
kernel-kvmsmall
kernel-default-livepatch-devel
kernel-zfcpdump
kernel-docs-html
kernel-macros
kernel-source-vanilla
kernel-kvmsmall-debugsource
kernel-kvmsmall-debuginfo
dtb-amd
ocfs2-kmp-64kb-debuginfo
reiserfs-kmp-64kb-debuginfo
ocfs2-kmp-64kb
kernel-64kb-extra
dtb-mediatek
dtb-xilinx
dtb-nvidia
kernel-64kb-extra-debuginfo
dtb-sprd
kernel-64kb-debuginfo
dtb-rockchip
dtb-amlogic
cluster-md-kmp-64kb-debuginfo
dtb-amazon
dlm-kmp-64kb
kselftests-kmp-64kb-debuginfo
kernel-64kb-optional-debuginfo
dtb-lg
dtb-apm
dlm-kmp-64kb-debuginfo
dtb-exynos
kernel-64kb-debugsource
dtb-freescale
reiserfs-kmp-64kb
dtb-cavium
kernel-64kb-devel
dtb-marvell
dtb-apple
dtb-allwinner
gfs2-kmp-64kb-debuginfo
dtb-hisilicon
kernel-64kb-devel-debuginfo
dtb-renesas
dtb-arm
cluster-md-kmp-64kb
dtb-broadcom
dtb-altera
kselftests-kmp-64kb
kernel-64kb-optional
dtb-qcom
kernel-default-base
kernel-default-base-rebuild
kernel-syms-rt
kernel-rt-devel-debuginfo
ocfs2-kmp-rt
gfs2-kmp-rt
dlm-kmp-rt-debuginfo
kernel-rt-devel
gfs2-kmp-rt-debuginfo
cluster-md-kmp-rt-debuginfo
kernel-rt-debugsource
cluster-md-kmp-rt
dlm-kmp-rt
kernel-rt-debuginfo
kernel-devel-rt
kernel-source-rt
kernel-rt
ocfs2-kmp-rt-debuginfo
kernel-azure-debugsource
kernel-azure-devel
kernel-azure-devel-debuginfo
kernel-azure
kernel-azure-debuginfo
linux (Ubuntu package)
linux-ibm (Ubuntu package)
linux-aws (Ubuntu package)
linux-azure (Ubuntu package)
linux-oem-7.0 (Ubuntu package)

How to mitigate CVE-2026-53357

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-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
bpftool - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
python3-perf-debuginfo - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
python3-perf - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
perf - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-source - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-headers - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-devel - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-debugsource - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-debuginfo - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
bpftool-debuginfo - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
perf-debuginfo - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-tools - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-tools-debuginfo - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
kernel-tools-devel - addressed in versions 5.10.0-323.0.0.224, 6.6.0-145.1.20.157
gfs2-kmp-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-extra - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-obs-qa - update to 6.4.0-150600.23.125.1
gfs2-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-devel-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
reiserfs-kmp-default-debuginfo - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
ocfs2-kmp-default - 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
gfs2-kmp-64kb - 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
kernel-kvmsmall-devel-debuginfo - 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
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
dlm-kmp-default - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-default-optional - update to 6.4.0-150600.23.125.1
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-debug-devel - update to 6.4.0-150600.23.125.1
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-debug-vdso-debuginfo - 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-64kb - 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-kvmsmall-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-default-livepatch-devel - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-zfcpdump - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.2
kernel-source - 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-devel - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.1
kernel-macros - addressed in versions 6.4.0-150600.23.125.1, 6.4.0-150700.53.73.1
kernel-source-vanilla - update to 6.4.0-150600.23.125.1
kernel-kvmsmall-debugsource - update to 6.4.0-150600.23.125.1
kernel-kvmsmall-debuginfo - update to 6.4.0-150600.23.125.1
dtb-amd - update to 6.4.0-150600.23.125.1
ocfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
reiserfs-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
ocfs2-kmp-64kb - update to 6.4.0-150600.23.125.1
kernel-64kb-extra - update to 6.4.0-150600.23.125.1
dtb-mediatek - update to 6.4.0-150600.23.125.1
dtb-xilinx - update to 6.4.0-150600.23.125.1
dtb-nvidia - update to 6.4.0-150600.23.125.1
kernel-64kb-extra-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-rockchip - 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-optional-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
dlm-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
dtb-exynos - 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
dtb-freescale - update to 6.4.0-150600.23.125.1
reiserfs-kmp-64kb - update to 6.4.0-150600.23.125.1
dtb-cavium - 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
dtb-marvell - update to 6.4.0-150600.23.125.1
dtb-apple - update to 6.4.0-150600.23.125.1
dtb-allwinner - update to 6.4.0-150600.23.125.1
gfs2-kmp-64kb-debuginfo - update to 6.4.0-150600.23.125.1
dtb-hisilicon - 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-renesas - update to 6.4.0-150600.23.125.1
dtb-arm - update to 6.4.0-150600.23.125.1
cluster-md-kmp-64kb - update to 6.4.0-150600.23.125.1
dtb-broadcom - 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
kernel-64kb-optional - update to 6.4.0-150600.23.125.1
dtb-qcom - 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
kernel-syms-rt - 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
cluster-md-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
ocfs2-kmp-rt-debuginfo - update to 6.4.0-150700.7.67.1
kernel-azure-debugsource - update to 6.4.0-150700.53.73.2
kernel-azure-devel - 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
kernel-azure-debuginfo - update to 6.4.0-150700.53.73.2
linux (Ubuntu package) - addressed in versions 7.0.0-28.28, 7.0.0-28.28.1, 7.0.0-1003.4, 7.0.0-1008.8
linux-ibm (Ubuntu package) - addressed in versions 7.0.0-1008.8, 7.0.0-1010.10
linux-aws (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1015.15
linux-azure (Ubuntu package) - addressed in versions 7.0.0-1009.9, 7.0.0-1010.10
linux-oem-7.0 (Ubuntu package) - update to 7.0.0-1009.9

External References

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