Critical severity9.8NVD Advisory· Published Jul 25, 2026· Updated Sep 4, 2026
CVE-2026-64386
CVE-2026-64386
Description
In the Linux kernel, the following vulnerability has been resolved:
smb: client: fix query_info() replay double-free
A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_query_info_init() fails before the next send, cleanup retains the previous buffer type and frees that response again.
Reset response bookkeeping before each attempt to prevent the stale free.
Affected products
78- osv-coords77 versionspkg:linux/kernelpkg:rpm/almalinux/kernelpkg:rpm/almalinux/kernel-64kpkg:rpm/almalinux/kernel-64k-corepkg:rpm/almalinux/kernel-64k-debugpkg:rpm/almalinux/kernel-64k-debug-corepkg:rpm/almalinux/kernel-64k-debug-develpkg:rpm/almalinux/kernel-64k-debug-devel-matchedpkg:rpm/almalinux/kernel-64k-debug-modulespkg:rpm/almalinux/kernel-64k-debug-modules-corepkg:rpm/almalinux/kernel-64k-debug-modules-extrapkg:rpm/almalinux/kernel-64k-develpkg:rpm/almalinux/kernel-64k-devel-matchedpkg:rpm/almalinux/kernel-64k-modulespkg:rpm/almalinux/kernel-64k-modules-corepkg:rpm/almalinux/kernel-64k-modules-extrapkg:rpm/almalinux/kernel-abi-stablelistspkg:rpm/almalinux/kernel-corepkg:rpm/almalinux/kernel-cross-headerspkg:rpm/almalinux/kernel-debugpkg:rpm/almalinux/kernel-debug-corepkg:rpm/almalinux/kernel-debug-develpkg:rpm/almalinux/kernel-debug-devel-matchedpkg:rpm/almalinux/kernel-debug-modulespkg:rpm/almalinux/kernel-debug-modules-corepkg:rpm/almalinux/kernel-debug-modules-extrapkg:rpm/almalinux/kernel-debug-uki-virtpkg:rpm/almalinux/kernel-develpkg:rpm/almalinux/kernel-devel-matchedpkg:rpm/almalinux/kernel-docpkg:rpm/almalinux/kernel-headerspkg:rpm/almalinux/kernel-modulespkg:rpm/almalinux/kernel-modules-corepkg:rpm/almalinux/kernel-modules-extrapkg:rpm/almalinux/kernel-modules-extra-matchedpkg:rpm/almalinux/kernel-rtpkg:rpm/almalinux/kernel-rt-64kpkg:rpm/almalinux/kernel-rt-64k-corepkg:rpm/almalinux/kernel-rt-64k-debugpkg:rpm/almalinux/kernel-rt-64k-debug-corepkg:rpm/almalinux/kernel-rt-64k-debug-develpkg:rpm/almalinux/kernel-rt-64k-debug-modulespkg:rpm/almalinux/kernel-rt-64k-debug-modules-corepkg:rpm/almalinux/kernel-rt-64k-debug-modules-extrapkg:rpm/almalinux/kernel-rt-64k-develpkg:rpm/almalinux/kernel-rt-64k-modulespkg:rpm/almalinux/kernel-rt-64k-modules-corepkg:rpm/almalinux/kernel-rt-64k-modules-extrapkg:rpm/almalinux/kernel-rt-corepkg:rpm/almalinux/kernel-rt-debugpkg:rpm/almalinux/kernel-rt-debug-corepkg:rpm/almalinux/kernel-rt-debug-develpkg:rpm/almalinux/kernel-rt-debug-modulespkg:rpm/almalinux/kernel-rt-debug-modules-corepkg:rpm/almalinux/kernel-rt-debug-modules-extrapkg:rpm/almalinux/kernel-rt-develpkg:rpm/almalinux/kernel-rt-modulespkg:rpm/almalinux/kernel-rt-modules-corepkg:rpm/almalinux/kernel-rt-modules-extrapkg:rpm/almalinux/kernel-toolspkg:rpm/almalinux/kernel-tools-libspkg:rpm/almalinux/kernel-tools-libs-develpkg:rpm/almalinux/kernel-uki-virtpkg:rpm/almalinux/kernel-uki-virt-addonspkg:rpm/almalinux/kernel-zfcpdumppkg:rpm/almalinux/kernel-zfcpdump-corepkg:rpm/almalinux/kernel-zfcpdump-develpkg:rpm/almalinux/kernel-zfcpdump-devel-matchedpkg:rpm/almalinux/kernel-zfcpdump-modulespkg:rpm/almalinux/kernel-zfcpdump-modules-corepkg:rpm/almalinux/kernel-zfcpdump-modules-extrapkg:rpm/almalinux/libperfpkg:rpm/almalinux/perfpkg:rpm/almalinux/python3-perfpkg:rpm/almalinux/rtlapkg:rpm/almalinux/rvpkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweed
< 6.6.145+ 76 more
- (no CPE)range: < 6.6.145
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 6.12.0-211.49.1.el10_2
- (no CPE)range: < 7.1.7-1.1
Patches
Vulnerability mechanics
References
5- git.kernel.org/stable/c/100fb7c455fa86d248b8bd7bb9de757c192870b4nvdPatch
- git.kernel.org/stable/c/2a88561d66eb855813cf004a0abe648bbb17de5envdPatch
- git.kernel.org/stable/c/3c81dda84799f76b42aec598564316e2964440dbnvdPatch
- git.kernel.org/stable/c/89234773e8348918111aa15f6922b58cf3843364nvdPatch
- git.kernel.org/stable/c/f1add4acb656f5a82806a1ab0e63fed3d8b1bfcanvdPatch
News mentions
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