CVE-2026-43112

HIGH EPSS 21.8%
Published May 6, 20261mo ago · Modified Jun 17, 20262w ago
8.8 CVSS 3.1
High
Find Similar
Published May 6, 2026 1mo ago
Last Modified Jun 17, 2026 2w ago

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.

CVSS Details

Base Score
8.8
Exploitability
2.8
Impact
5.9
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality High
Integrity High
Availability High

Threat Intelligence

EPSS Exploit Probability
21.8% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 14

VendorProductVersionRange
linuxlinux_kernel*≥5.16.1  –  <6.6.136
linuxlinux_kernel*≥6.7  –  <6.12.83
linuxlinux_kernel*≥6.13  –  <6.18.24
linuxlinux_kernel*≥6.19  –  <6.19.14
linuxlinux_kernel5.16any
linuxlinux_kernel5.16any
linuxlinux_kernel5.16any
linuxlinux_kernel5.16any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any
linuxlinux_kernel7.0any

References 7

  • git.kernel.org https://git.kernel.org/stable/c/2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d4fe469fe7dbff7d874c196bb680a82f2625d95
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78ec5bf2f589ec7fd8f169394bfeca541b077317
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/86f9c23e0814cfdffda9eedf0c591c51ba209010
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/a2ba20c17de8eb028f96b1d85f119d3d25655bd9
  • git.kernel.org https://git.kernel.org/stable/c/fbced33599653471b4581dfe1abc7b467031f126

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/5d4fe469fe7dbff7d874c196bb680a82f2625d95
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/78ec5bf2f589ec7fd8f169394bfeca541b077317
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/86f9c23e0814cfdffda9eedf0c591c51ba209010
    Patch