High severity8.8NVD Advisory· Published May 6, 2026· Updated Aug 12, 2026
CVE-2026-43112
CVE-2026-43112
Description
In the Linux kernel, the following vulnerability has been resolved:
fs/smb/client: fix out-of-bounds read in cifs_sanitize_prepath
When cifs_sanitize_prepath is called with an empty string or a string containing only delimiters (e.g., "/"), the current logic attempts to check *(cursor2 - 1) before cursor2 has advanced. This results in an out-of-bounds read.
This patch adds an early exit check after stripping prepended delimiters. If no path content remains, the function returns NULL.
The bug was identified via manual audit and verified using a standalone test case compiled with AddressSanitizer, which triggered a SEGV on affected inputs.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected products
121cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*+ 11 more
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*range: >=5.16.1,<6.6.136
- cpe:2.3:o:linux:linux_kernel:5.16:-:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc6:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc7:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:5.16:rc8:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc1:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc2:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc3:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc4:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc5:*:*:*:*:*:*
- cpe:2.3:o:linux:linux_kernel:7.0:rc6:*:*:*:*:*:*
- (no CPE)
- osv-coords109 versionspkg:apk/chainguard/linux-aws-6.18pkg:apk/chainguard/linux-azure-6.18pkg:apk/chainguard/linux-gcp-6.18pkg:apk/chainguard/linux-qemu-6.18pkg:apk/chainguard/linux-qemu-6.18-bootc-boot-installedpkg:apk/chainguard/linux-vmware-6.18pkg:linux/kernelpkg:rpm/almalinux/bpftoolpkg: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/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-64kb&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-azure&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20High%20Availability%20Extension%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-default-base&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-docs&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-kvmsmall&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-obs-qa&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-rt&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-source&distro=SUSE%20Linux%20Micro%206.2pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-syms&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/kernel-zfcpdump&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
< 6.18.31-r0+ 108 more
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.24-r1
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 6.18.31-r0
- (no CPE)range: < 5.15.209
- (no CPE)range: < 4.18.0-553.141.1.el8_10
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-211.30.1.el10_2
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1.160000.2.15
- (no CPE)range: < 6.12.0-160000.34.1.160000.2.15
- (no CPE)range: < 6.12.0-160000.34.1.160000.2.15
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
- (no CPE)range: < 6.12.0-160000.34.1
Patches
Vulnerability mechanics
References
19- git.kernel.org/stable/c/2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439nvdPatch
- git.kernel.org/stable/c/49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3nvdPatch
- git.kernel.org/stable/c/5d4fe469fe7dbff7d874c196bb680a82f2625d95nvdPatch
- git.kernel.org/stable/c/78ec5bf2f589ec7fd8f169394bfeca541b077317nvdPatch
- git.kernel.org/stable/c/86f9c23e0814cfdffda9eedf0c591c51ba209010nvdPatch
- access.redhat.com/errata/RHSA-2026:34911nvd
- access.redhat.com/errata/RHSA-2026:36018nvd
- access.redhat.com/errata/RHSA-2026:36365nvd
- access.redhat.com/errata/RHSA-2026:36366nvd
- access.redhat.com/errata/RHSA-2026:40764nvd
- access.redhat.com/errata/RHSA-2026:52649nvd
- access.redhat.com/errata/RHSA-2026:52764nvd
- access.redhat.com/errata/RHSA-2026:53989nvd
- access.redhat.com/errata/RHSA-2026:53990nvd
- access.redhat.com/security/cve/CVE-2026-43112nvd
- bugzilla.redhat.com/show_bug.cginvd
- git.kernel.org/stable/c/a2ba20c17de8eb028f96b1d85f119d3d25655bd9nvd
- git.kernel.org/stable/c/fbced33599653471b4581dfe1abc7b467031f126nvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43112.jsonnvd
News mentions
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