crypto: arm64/neonbs - fix out-of-bounds access on short input

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Summary

CVECVE-2024-26789
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-04-04 09:15:08 UTC
Updated2026-08-04 11:17:04 UTC
DescriptionIn 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 this is a rare occurrence and it is not worth the effort to work around this in the asm code. The fallback from the bit-sliced NEON version fails to take this into account, potentially resulting in out-of-bounds accesses. So clone the same workaround, and use a temp buffer for short in/outputs.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from ADP

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

EPSS: 0.002340000 probability, percentile 0.143350000 (date 2026-08-06)

Problem Types: CWE-125 | CWE-noinfo Not enough information

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
3.1CNADECLARED7.8HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel 6.8 rc1 All All
Operating System Linux Linux Kernel 6.8 rc2 All All
Operating System Linux Linux Kernel 6.8 rc3 All All
Operating System Linux Linux Kernel 6.8 rc4 All All
Operating System Linux Linux Kernel 6.8 rc5 All All
Operating System Linux Linux Kernel 6.8 rc6 All All
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected fc074e130051015e39245a4241956ff122e2f465 034e2d70b5c7f578200ad09955aeb2aa65d1164a git Not specified
CNA Linux Linux affected fc074e130051015e39245a4241956ff122e2f465 1291d278b5574819a7266568ce4c28bce9438705 git Not specified
CNA Linux Linux affected fc074e130051015e39245a4241956ff122e2f465 9e8ecd4908b53941ab6f0f51584ab80c6c6606c4 git Not specified
CNA Linux Linux affected fc074e130051015e39245a4241956ff122e2f465 1c0cf6d19690141002889d72622b90fc01562ce4 git Not specified
CNA Linux Linux affected 5.18 Not specified
CNA Linux Linux unaffected 5.18 semver Not specified
CNA Linux Linux unaffected 6.1.81 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.21 6.6.* semver Not specified
CNA Linux Linux unaffected 6.7.9 6.7.* semver Not specified
CNA Linux Linux unaffected 6.8 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/034e2d70b5c7f578200ad09955aeb2aa65d1164a af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/1c0cf6d19690141002889d72622b90fc01562ce4 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/9e8ecd4908b53941ab6f0f51584ab80c6c6606c4 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/1291d278b5574819a7266568ce4c28bce9438705 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Legacy QID Mappings

  • 6000567 Debian Security Update for linux (DSA 5658-1)

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