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Priority reviewCritical

CVE-2023-52755

Linux Linux, linux_kernel, linux kernel

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slab out of bounds write in smb_inherit_dacl() slab out-of-bounds write is caused by that offsets is bigger than pntsd allocation size. This patch add the check to validate 3 offsets using allocation size.

CVSS
9.8
EPSS
27.9%
97.9% percentile
CISA KEV
Not listed
Published
2024.05.22
PRIORITY ASSESSMENT

Priority review

FIRST EPSS indicates an elevated probability of exploitation.

Known exploitationNot established by KEV
Exploit probability27.9%
Technical severityCVSS 9.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: ksmbd: fix slab out of bounds write in smb_inherit_dacl() slab out-of-bounds write is caused by that offsets is bigger than pntsd allocation size. This patch add the check to validate 3 offsets using allocation size.

Affected product and versions

Product
Linux Linux, linux_kernel, linux kernel
Affected versions
>= 0626e6641f6b467447c81dd7678a69c66f7746cf < aaf0a07d60887d6c36fc46a24de0083744f07819, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 8387c94d73ec66eb597c7a23a8d9eadf64bfbafa, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 09d9d8b40a3338193619c14ed4dc040f4f119e70, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < 712e01f32e577e7e48ab0adb5fe550646a3d93cb, >= 0626e6641f6b467447c81dd7678a69c66f7746cf < eebff19acaa35820cb09ce2ccb3d21bee2156ffb, >= 5.15, >= 1da177e4c3f4 < aaf0a07d6088, >= 1da177e4c3f4 < 8387c94d73ec, >= 1da177e4c3f4 < 09d9d8b40a33, >= 1da177e4c3f4 < 712e01f32e57, >= 1da177e4c3f4 < eebff19acaa3, >= 5.15 < 5.15.140, >= 5.16 < 6.1.64, >= 6.2 < 6.5.13, >= 6.6 < 6.6.3
Fixed versions
5.15.140, 6.1.64, 6.5.13, 6.6.3

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux_kernel, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-787