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Review reviewHigh

CVE-2024-26789

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: crypto: arm64/neonbs - fix out-of-bounds access on short input The bit-sliced implementation of AES-CTR operates on blocks of 128 bytes, and will fall back to the plain NEON version for tail blocks or inputs that are shorter than 128 bytes to begin with. It will call straight into the plain NEON asm helper, which performs all memory accesses in granules of 16 bytes (the size of a NEON register). For this reason, the associated plain NEON glue code will copy inputs shorter than 16 bytes into a temporary buffer, given that th...

CVSS
7.8
EPSS
0.23%
14.3% percentile
CISA KEV
Not listed
Published
2024.04.04
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.23%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: crypto: arm64/neonbs - fix out-of-bounds access on short input The bit-sliced implementation of AES-CTR operates on blocks of 128 bytes, and will fall back to the plain NEON version for tail blocks or inputs that are shorter than 128 bytes to begin with. It will call straight into the plain NEON asm helper, which performs all memory accesses in granules of 16 bytes (the size of a NEON register). For this reason, the associated plain NEON glue code will copy inputs shorter than 16 bytes into a temporary buffer, given that th...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= fc074e130051015e39245a4241956ff122e2f465 < 034e2d70b5c7f578200ad09955aeb2aa65d1164a, >= fc074e130051015e39245a4241956ff122e2f465 < 1291d278b5574819a7266568ce4c28bce9438705, >= fc074e130051015e39245a4241956ff122e2f465 < 9e8ecd4908b53941ab6f0f51584ab80c6c6606c4, >= fc074e130051015e39245a4241956ff122e2f465 < 1c0cf6d19690141002889d72622b90fc01562ce4, >= 5.18, >= 5.18 <= 6.1.81, >= 6.2 <= 6.6.21, >= 6.2 <= 6.7.9, 6.8
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, 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:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-125