CVE-2026-97503

high

Description

In the Linux kernel, the following vulnerability has been resolved: genirq/proc: Size interrupt directory names for 10-digit interrupt numbers /proc/irq/<n>/ directory names are built in `char name[10]` buffers with `sprintf(name, "%u", irq)`. Ten-digit IRQ numbers already need 11 bytes including the trailing NUL, and current sparse-IRQ configurations allow interrupt numbers in that range. Size the temporary name buffer for the current decimal form and switch to bounded formatting when creating or removing the proc entry.

References

https://git.kernel.org/stable/c/d4b22fbae70037299e96539c330e4a1054b28a91

https://git.kernel.org/stable/c/c2c7983c93f5d86962318be7e7298f1bc3feb1a6

https://git.kernel.org/stable/c/a8adf64fe7fd5d7c476769a043ee56eda7b775ce

https://git.kernel.org/stable/c/488bcd7fd3e9a2ad647b71b505a269fdb28753c4

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-86101

Details

Source: Mitre, NVD

Published: 2026-09-24

Updated: 2026-10-21

Risk Information

CVSS v2

Base Score: 7.2

Vector: CVSS2#AV:L/AC:L/Au:N/C:C/I:C/A:C

Severity: High

CVSS v3

Base Score: 8.4

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

Severity: High

EPSS

EPSS: 0.00157