CVE-2026-43112

Advisory lineage Upstream: 0 Downstream: 21
Modified
Published: 06 May 2026, 07:40
Last modified:22 Jul 2026, 12:08

Vulnerability Summary

Overall Risk (default)
medium
35/100
CVSS Score
8.8 HIGH
v3.1 (cve.org)
EPSS Score
0.34% LOW
0% probability 0.00%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

06 May 2026, 07:40
Published
Vulnerability first disclosed
22 Jul 2026, 12:08
Last Modified
Vulnerability information updated

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 Metrics

  • v3.1•HIGH•Score: 8.8CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

EPSS Trends

Current EPSS score: 0.34%• Percentile: 26%

Techniques & Countermeasures

  • CWE-125•Out-of-bounds Read

    The product reads data past the end, or before the beginning, of the intended buffer.

Affected Systems

  • linux•linux

    ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5d4fe469fe7dbff7d874c196bb680a82f2625d95 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 86f9c23e0814cfdffda9eedf0c591c51ba209010 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3 | ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 78ec5bf2f589ec7fd8f169394bfeca541b077317 | c63433a09d6ae4c226fcbc66da4c58fc189fd746 | ≥ 5.15.11, < 5.16 | ≥ c63433a09d6ae4c226fcbc66da4c58fc189fd746, < a2ba20c17de8eb028f96b1d85f119d3d25655bd9 | ≥ a31080899d5fdafcccf7f39dd214a814a2c82626, < fbced33599653471b4581dfe1abc7b467031f126 | ≥ a31080899d5fdafcccf7f39dd214a814a2c82626, < 5d4fe469fe7dbff7d874c196bb680a82f2625d95 | ≥ a31080899d5fdafcccf7f39dd214a814a2c82626, < 2d29214448ec0f4e7e18bb1c14dd4a6c07f1c439 | ≥ a31080899d5fdafcccf7f39dd214a814a2c82626, < 86f9c23e0814cfdffda9eedf0c591c51ba209010 | ≥ a31080899d5fdafcccf7f39dd214a814a2c82626, < 49b1ce6d7cfb6c5a49f68bf5ccfcfb6ba14e63c3 | ≥ a31080899d5fdafcccf7f39dd214a814a2c82626, < 78ec5bf2f589ec7fd8f169394bfeca541b077317 | ≥ 5.15.11, < 5.15.209 | 5.16

  • linux•linux kernel

    ≥ 5.16.1, < 6.6.136 | ≥ 6.7, < 6.12.83 | ≥ 6.13, < 6.18.24 | ≥ 6.19, < 6.19.14 | 5.16 | 5.16:rc6 | 5.16:rc7 | 5.16:rc8 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6

References (15)