Critical severity9.8NVD Advisory· Published Aug 6, 2026· Updated Oct 19, 2026

CVE-2026-64597

Description

In the Linux kernel, the following vulnerability has been resolved:

smb: client: fix double-free in SMB2_close() replay

A response-bearing attempt can return a replayable error and free its response buffer. If SMB2_close_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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

osv-coords76 versions
pkg:rpm/almalinux/kernel-headers pkg:rpm/almalinux/kernel-rt-64k-modules-core pkg:rpm/almalinux/kernel-rt-core pkg:rpm/almalinux/kernel-uki-virt pkg:rpm/almalinux/kernel-rt-debug-modules-extra pkg:rpm/almalinux/kernel-debug-modules pkg:linux/kernel pkg:rpm/almalinux/kernel-64k-debug-modules-core pkg:rpm/almalinux/kernel-64k-modules-core pkg:rpm/almalinux/kernel-abi-stablelists pkg:rpm/almalinux/kernel-core pkg:rpm/almalinux/kernel-debug-devel-matched pkg:rpm/almalinux/rtla pkg:rpm/almalinux/kernel-zfcpdump-modules-extra pkg:rpm/almalinux/kernel pkg:rpm/almalinux/kernel-64k-debug pkg:rpm/almalinux/kernel-64k-debug-core pkg:rpm/almalinux/kernel-64k-debug-devel pkg:rpm/almalinux/kernel-64k-debug-devel-matched pkg:rpm/almalinux/kernel-devel-matched pkg:rpm/almalinux/kernel-modules pkg:rpm/almalinux/kernel-rt pkg:rpm/almalinux/kernel-rt-64k pkg:rpm/almalinux/kernel-rt-64k-core pkg:rpm/almalinux/kernel-rt-modules-core pkg:rpm/almalinux/kernel-rt-modules-extra pkg:rpm/almalinux/kernel-zfcpdump-devel-matched pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Tumbleweed pkg:rpm/almalinux/kernel-debug-modules-extra pkg:rpm/almalinux/kernel-rt-64k-debug-core pkg:rpm/almalinux/kernel-rt-64k-debug-modules-core pkg:rpm/almalinux/rv pkg:rpm/almalinux/kernel-debug-uki-virt pkg:rpm/almalinux/kernel-rt-debug-core pkg:rpm/almalinux/kernel-devel pkg:rpm/almalinux/kernel-rt-64k-modules pkg:rpm/almalinux/libperf pkg:rpm/almalinux/kernel-modules-core pkg:rpm/almalinux/kernel-rt-64k-debug-devel pkg:rpm/almalinux/kernel-rt-debug-devel pkg:rpm/almalinux/kernel-rt-debug-modules-core pkg:rpm/almalinux/kernel-rt-modules pkg:rpm/almalinux/kernel-modules-extra pkg:rpm/almalinux/kernel-64k-devel pkg:rpm/almalinux/kernel-debug-devel pkg:rpm/almalinux/kernel-tools pkg:rpm/almalinux/kernel-64k-core pkg:rpm/almalinux/kernel-tools-libs pkg:rpm/almalinux/kernel-cross-headers pkg:rpm/almalinux/kernel-64k-debug-modules-extra pkg:rpm/almalinux/kernel-rt-64k-debug-modules-extra pkg:rpm/almalinux/kernel-rt-debug-modules pkg:rpm/almalinux/python3-perf pkg:rpm/almalinux/kernel-rt-64k-devel pkg:rpm/almalinux/kernel-zfcpdump-modules-core pkg:rpm/almalinux/kernel-debug pkg:rpm/almalinux/kernel-64k pkg:rpm/almalinux/kernel-64k-modules-extra pkg:rpm/almalinux/kernel-rt-debug pkg:rpm/almalinux/kernel-rt-64k-modules-extra pkg:rpm/almalinux/kernel-debug-core pkg:rpm/almalinux/kernel-64k-debug-modules pkg:rpm/almalinux/kernel-doc pkg:rpm/almalinux/kernel-rt-64k-debug-modules pkg:rpm/almalinux/kernel-uki-virt-addons pkg:rpm/almalinux/kernel-64k-devel-matched pkg:rpm/almalinux/kernel-64k-modules pkg:rpm/almalinux/kernel-rt-devel pkg:rpm/almalinux/kernel-tools-libs-devel pkg:rpm/almalinux/kernel-zfcpdump-modules pkg:rpm/almalinux/kernel-debug-modules-core pkg:rpm/almalinux/kernel-zfcpdump pkg:rpm/almalinux/kernel-zfcpdump-core pkg:rpm/almalinux/kernel-zfcpdump-devel pkg:rpm/almalinux/perf pkg:rpm/almalinux/kernel-rt-64k-debug
< 5.14.0-687.46.1.el9_8+ 75 more
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- (no CPE)range: < 6.6.145
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- (no CPE)range: < 7.1.7-1.1
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- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
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- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
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- (no CPE)range: < 5.14.0-687.46.1.el9_8
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- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
- (no CPE)range: < 5.14.0-687.46.1.el9_8
Linux/Kernelllm-fuzzy

Patches

Vulnerability mechanics

References

News mentions

Linux Kernel: 25 Vulnerabilities Disclosed in Batch Affecting x86, KVM, USB, and Networking
Vypr Intelligence · Aug 6, 2026

cvss	0.637
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000