tracing: ring-buffer: Fix to check event length before using

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Summary

CVECVE-2026-43210
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-05-06 12:16:40 UTC
Updated2026-05-11 19:58:20 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: tracing: ring-buffer: Fix to check event length before using Check the event length before adding it for accessing next index in rb_read_data_buffer(). Since this function is used for validating possibly broken ring buffers, the length of the event could be broken. In that case, the new event (e + len) can point a wrong address. To avoid invalid memory access at boot, check whether the length of each event is in the possible range before using it.

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

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 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 b4700c089a10f89de3a5149d57f8a58306458982 git Not specified
CNA Linux Linux affected 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 5026010110a5ad2268d8c23e1e286ab7c736f7ac git Not specified
CNA Linux Linux affected 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 9eb80e54494ef1efef8a64bec4ffa672c9cf411e git Not specified
CNA Linux Linux affected 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 912b0ee248c529a4f45d1e7f568dc1adddbf2a4a git Not specified
CNA Linux Linux affected 6.12 Not specified
CNA Linux Linux unaffected 6.12 semver Not specified
CNA Linux Linux unaffected 6.12.75 6.12.* semver Not specified
CNA Linux Linux unaffected 6.18.16 6.18.* semver Not specified
CNA Linux Linux unaffected 6.19.6 6.19.* semver Not specified
CNA Linux Linux unaffected 7.0 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/b4700c089a10f89de3a5149d57f8a58306458982 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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