bpf: Use correct permission flag for mixed signed bounds arithmetic

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Summary

CVECVE-2021-46908
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2024-02-27 07:15:06 UTC
Updated2026-08-04 10:16:35 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: bpf: Use correct permission flag for mixed signed bounds arithmetic We forbid adding unknown scalars with mixed signed bounds due to the spectre v1 masking mitigation. Hence this also needs bypass_spec_v1 flag instead of allow_ptr_leaks.

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

Problem Types: NVD-CWE-noinfo

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary5.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
3.1416baaa9-dc9f-4396-8d5f-8c081fb06d67Secondary7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
3.1CNADECLARED7.1HIGHCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

CVSS v3.1 Breakdown

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

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366 4f3ff11204eac0ee23acf64deecb3bad7b0db0c6 git Not specified
CNA Linux Linux affected 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366 4ccdc6c6cae38b91c871293fb0ed8c6845a61b51 git Not specified
CNA Linux Linux affected 2c78ee898d8f10ae6fb2fa23a3fbaec96b1b7366 9601148392520e2e134936e76788fc2a6371e7be git Not specified
CNA Linux Linux affected 5.8 Not specified
CNA Linux Linux unaffected 5.8 semver Not specified
CNA Linux Linux unaffected 5.10.32 5.10.* semver Not specified
CNA Linux Linux unaffected 5.11.16 5.11.* semver Not specified
CNA Linux Linux unaffected 5.12 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/9601148392520e2e134936e76788fc2a6371e7be af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/4ccdc6c6cae38b91c871293fb0ed8c6845a61b51 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
git.kernel.org/stable/c/4f3ff11204eac0ee23acf64deecb3bad7b0db0c6 af854a3a-2127-422b-91ae-364da2661108 git.kernel.org Patch
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