CVE-2026-97503
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.
Affected versions
Linux kernel versions
6.5
and later are affected. Fixed in
6.18.53,
7.2
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-97503?
CVE-2026-97503 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.5 onward and has been patched in 6.18.53 and 7.2. CVE-2026-97503 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-97503?
Yes. CVE-2026-97503 has been patched. Fixed versions include 6.18.53 and 7.2. If you are running Linux kernel 6.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-97503 actively exploited?
No. CVE-2026-97503 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.