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kernel: smb: client: fix use-after-free in cifs_oplock_break

🗓️ 18 Nov 2025 09:02:45Reported by RedHatType 
redhat
 redhat🔗 access.redhat.com

Kernel fix for use-after-free in cifs_oplock_break by holding extra superblock reference.

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OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux8.2x86_64bpftool0:4.18.0-193.173.1.el8_2bpftool-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64bpftool-debuginfo0:4.18.0-193.173.1.el8_2bpftool-debuginfo-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel0:4.18.0-193.173.1.el8_2kernel-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2anykernel-abi-whitelists0:4.18.0-193.173.1.el8_2kernel-abi-whitelists-0:4.18.0-193.173.1.el8_2.noarch.rpm
Red Hat Enterprise Linux8.2x86_64kernel-core0:4.18.0-193.173.1.el8_2kernel-core-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug0:4.18.0-193.173.1.el8_2kernel-debug-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-core0:4.18.0-193.173.1.el8_2kernel-debug-core-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-debuginfo0:4.18.0-193.173.1.el8_2kernel-debug-debuginfo-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-devel0:4.18.0-193.173.1.el8_2kernel-debug-devel-0:4.18.0-193.173.1.el8_2.x86_64.rpm
Red Hat Enterprise Linux8.2x86_64kernel-debug-modules0:4.18.0-193.173.1.el8_2kernel-debug-modules-0:4.18.0-193.173.1.el8_2.x86_64.rpm
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18 Mar 2026 03:07Current
5.7Medium risk
Vulners AI Score5.7
CVSS 3.17.8
EPSS0.00025
CWE-825
use after freeoplock breaksuperblock referenceinode cleanup
0