SB20261023130 - Out-of-bounds read in Linux kernel md driver

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Main Vulnerability Database SB20261023130

SB20261023130 - Out-of-bounds read in Linux kernel md driver

Published: October 23, 2026

Security Bulletin ID SB20261023130
CSH Severity
Low
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Local access
Highest impact Partial DoS

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 vulnerability.


1) Out-of-bounds read (CVE-ID: CVE-2026-99037)

CWE-ID: CWE-125 - Out-of-bounds read

CVSSv4: 4.6 [CVSS:4.0/AV:L/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]


The vulnerability allows a local privileged user to cause a denial of service by triggering a kernel oops.

The vulnerability exists due to an out-of-bounds read in the Linux kernel dm-crypt component when loading a table that combines an AEAD cipher with the lmk initialization vector mode. A local privileged user can load a table containing "capi:gcm(aes)-lmk" with the "integrity:28:aead" option to trigger a kernel oops: lmk sets tfms_count to 64, but crypt_alloc_tfms_aead allocates only one transform, causing crypt_setkey to read beyond the tfms_aead array and pass the resulting values to crypto_aead_setkey.


Remediation

Install update from vendor's website.

References