Medium 5.5Published May 6, 2026

CVE-2026-43210tracing: ring-buffer: Fix to check event length before using

Updated under an hour ago (Oct 28, 2026, 4:23 AM ET)

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Exploited in the last 30 days

In 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.

CVSS: 5.5 MEDIUM (v3.1, NVD)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: Linux
NVD analysis: Analyzed
Record last updated: May 11, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Linux Linux linux:linux (from the name)	from 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before b4700c089a10f89de3a5149d57f8a58306458982; from 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before 5026010110a5ad2268d8c23e1e286ab7c736f7ac; from 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before 9eb80e54494ef1efef8a64bec4ffa672c9cf411e; from 5f3b6e839f3ceb8d6ef02231ba9b5aca71b8bf55 before 912b0ee248c529a4f45d1e7f568dc1adddbf2a4a	CNA record
linux linux_kernel linux:linux_kernel	from 6.12 before 6.12.75; from 6.13 before 6.18.16; from 6.19 before 6.19.6	NVD

References

References

https://git.kernel.org/stable/c/b4700c089a10f89de3a5149d57f8a58306458982	patch
https://git.kernel.org/stable/c/5026010110a5ad2268d8c23e1e286ab7c736f7ac	patch
https://git.kernel.org/stable/c/9eb80e54494ef1efef8a64bec4ffa672c9cf411e	patch
https://git.kernel.org/stable/c/912b0ee248c529a4f45d1e7f568dc1adddbf2a4a	patch

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.