{"id":"CVE-2026-97503","title":"In the Linux kernel, the following vulnerability has been resolved:\n\ngenirq/proc: Size interrupt directory names for 10-digit interrupt numbers\n\n/proc/irq/<n>/ directory names are built in `char name[10]` buffers\nwith `sprintf(name, \"%u\"…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ngenirq/proc: Size interrupt directory names for 10-digit interrupt numbers\n\n/proc/irq/<n>/ directory names are built in `char name[10]` buffers\nwith `sprintf(name, \"%u\"…","severity":"medium","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < d4b22fbae70037299e96539c330e4a1054b28a91","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < c2c7983c93f5d86962318be7e7298f1bc3feb1a6","Linux < 6.18.53","Linux (all versions)"],"published":"2026-09-24","updated":"2026-09-28","sourceUpdated":"2026-09-28T06:16:36.273","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-97503","references":[{"url":"https://git.kernel.org/stable/c/c2c7983c93f5d86962318be7e7298f1bc3feb1a6","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/d4b22fbae70037299e96539c330e4a1054b28a91","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97503.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-97503"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2540488"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-97503"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-97503"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-97503.mbox"},{"url":"https://git.kernel.org/stable/c/a8adf64fe7fd5d7c476769a043ee56eda7b775ce"},{"url":"https://git.kernel.org/stable/c/488bcd7fd3e9a2ad647b71b505a269fdb28753c4"}],"tags":["nvd","cve.org","csaf","vex","red-hat"],"epss":0.00157,"epssPercentile":0.04782,"ingestedAt":"2026-09-24T16:47:15.863Z","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cvssSource":"vendor","cwe":["CWE-787"],"slug":"CVE-2026-97503","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ngenirq/proc: Size interrupt directory names for 10-digit interrupt numbers\n\n/proc/irq/<n>/ directory names are built in `char name[10]` buffers\nwith `sprintf(name, \"%u\", irq)`.\n\nTen-digit IRQ numbers already need 11 bytes including the trailing NUL, and\ncurrent sparse-IRQ configurations allow interrupt numbers in that range.\n\nSize the temporary name buffer for the current decimal form and switch\nto bounded formatting when creating or removing the proc entry.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Low · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · updated 2026-10-17 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-97503.json)","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":224193,"id":"CVE-2026-97503","ts":1792325003275,"field":"cvss","old":null,"new":"5.5"},{"seq":224192,"id":"CVE-2026-97503","ts":1792325003275,"field":"severity","old":"none","new":"medium"}]}