CVE-2026-43112

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.
References
Link Resource
https://git.kernel.org/stable/c/2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439 Patch
https://git.kernel.org/stable/c/49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3 Patch
https://git.kernel.org/stable/c/5d4fe469fe7dbff7d874c196bb680a82f2625d95 Patch
https://git.kernel.org/stable/c/78ec5bf2f589ec7fd8f169394bfeca541b077317 Patch
https://git.kernel.org/stable/c/86f9c23e0814cfdffda9eedf0c591c51ba209010 Patch
https://git.kernel.org/stable/c/a2ba20c17de8eb028f96b1d85f119d3d25655bd9
https://git.kernel.org/stable/c/fbced33599653471b4581dfe1abc7b467031f126
https://access.redhat.com/errata/RHSA-2026:34911
https://access.redhat.com/errata/RHSA-2026:36018
https://access.redhat.com/errata/RHSA-2026:36365
https://access.redhat.com/errata/RHSA-2026:36366
https://access.redhat.com/errata/RHSA-2026:40764
https://access.redhat.com/errata/RHSA-2026:52649
https://access.redhat.com/errata/RHSA-2026:52764
https://access.redhat.com/errata/RHSA-2026:53989
https://access.redhat.com/errata/RHSA-2026:53990
https://access.redhat.com/errata/RHSA-2026:56573
https://access.redhat.com/errata/RHSA-2026:57402
https://access.redhat.com/errata/RHSA-2026:57457
https://access.redhat.com/errata/RHSA-2026:57543
https://access.redhat.com/errata/RHSA-2026:59662
https://access.redhat.com/errata/RHSA-2026:59663
https://access.redhat.com/errata/RHSA-2026:59831
https://access.redhat.com/errata/RHSA-2026:60019
https://access.redhat.com/errata/RHSA-2026:62409
https://access.redhat.com/errata/RHSA-2026:62549
https://access.redhat.com/errata/RHSA-2026:62558
https://access.redhat.com/errata/RHSA-2026:62637
https://access.redhat.com/errata/RHSA-2026:62638
https://access.redhat.com/errata/RHSA-2026:62639
https://access.redhat.com/errata/RHSA-2026:62640
https://access.redhat.com/errata/RHSA-2026:62641
https://access.redhat.com/errata/RHSA-2026:62642
https://access.redhat.com/security/cve/CVE-2026-43112
https://bugzilla.redhat.com/show_bug.cgi?id=2467015
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43112.json
Configurations

Configuration 1 (hide)

OR cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
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:*:*:*:*:*:*

History

No history.

Information

Published : 2026-05-06 10:16

Updated : 2026-09-15 12:17


NVD link : CVE-2026-43112

Mitre link : CVE-2026-43112

CVE.ORG link : CVE-2026-43112


JSON object : View

Products Affected

linux

  • linux_kernel
CWE
CWE-125

Out-of-bounds Read