{"id":"CVE-2026-98495","state":"PUBLISHED","title":"net: arp: terminate device name before lookup","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: arp: terminate device name before lookup\n\nThe ARP ioctl copies a user-provided struct arpreq into a stack object. Its\narp_dev field may contain IFNAMSIZ bytes without a NUL terminator.\n\nSuch input is passed to dev_get_by_name_rcu() or __dev_get_by_name(), where\nstrcmp() can read past the end of the stack object when a matching\nalternative interface name exists.\n\nTerminate the field before the lookup to prevent the out-of-bounds read.","publishedAt":"2026-10-18T15:16:24.810Z","updatedAt":"2026-10-19T09:20:32.370Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"ae6d704dbf9542b0a0830ec91a2db4f30307e7d8","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"47107491b48ceef0a2faa7a010cfa961f211ef9f","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"7389757d88f54237951d7497d9c4dae7cc6d64be","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"414bbad9928598904313299ac9e037a73f520be1","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"ba664d83638640cf454b65167339cbf20dfd6f10","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"35e716a70733472ede300540082d64c33bf3b4c9","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"d8b6529e80bcb4fb8177121404cbb3377acaebd2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/arp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/arp.c"]}],"references":["https://git.kernel.org/stable/c/ae6d704dbf9542b0a0830ec91a2db4f30307e7d8","https://git.kernel.org/stable/c/47107491b48ceef0a2faa7a010cfa961f211ef9f","https://git.kernel.org/stable/c/7389757d88f54237951d7497d9c4dae7cc6d64be","https://git.kernel.org/stable/c/1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b","https://git.kernel.org/stable/c/414bbad9928598904313299ac9e037a73f520be1","https://git.kernel.org/stable/c/ba664d83638640cf454b65167339cbf20dfd6f10","https://git.kernel.org/stable/c/35e716a70733472ede300540082d64c33bf3b4c9","https://git.kernel.org/stable/c/d8b6529e80bcb4fb8177121404cbb3377acaebd2"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98495.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98495","state":"PUBLISHED","datePublished":"2026-10-18T15:16:24.810Z","dateUpdated":"2026-10-19T09:20:32.370Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.353Z"},"containers":{"cna":{"title":"net: arp: terminate device name before lookup","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet: arp: terminate device name before lookup\n\nThe ARP ioctl copies a user-provided struct arpreq into a stack object. Its\narp_dev field may contain IFNAMSIZ bytes without a NUL terminator.\n\nSuch input is passed to dev_get_by_name_rcu() or __dev_get_by_name(), where\nstrcmp() can read past the end of the stack object when a matching\nalternative interface name exists.\n\nTerminate the field before the lookup to prevent the out-of-bounds read."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"ae6d704dbf9542b0a0830ec91a2db4f30307e7d8","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"47107491b48ceef0a2faa7a010cfa961f211ef9f","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"7389757d88f54237951d7497d9c4dae7cc6d64be","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"414bbad9928598904313299ac9e037a73f520be1","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"ba664d83638640cf454b65167339cbf20dfd6f10","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"35e716a70733472ede300540082d64c33bf3b4c9","versionType":"git"},{"version":"36fbf1e52bd3ff8a5cb604955eedfc9350c2e6cc","status":"affected","lessThan":"d8b6529e80bcb4fb8177121404cbb3377acaebd2","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/arp.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.5","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.5","versionType":"semver"},{"version":"5.10.271","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/arp.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/ae6d704dbf9542b0a0830ec91a2db4f30307e7d8"},{"url":"https://git.kernel.org/stable/c/47107491b48ceef0a2faa7a010cfa961f211ef9f"},{"url":"https://git.kernel.org/stable/c/7389757d88f54237951d7497d9c4dae7cc6d64be"},{"url":"https://git.kernel.org/stable/c/1b08c5c3ac27c9ff91c5309f4a32b4e91ce2263b"},{"url":"https://git.kernel.org/stable/c/414bbad9928598904313299ac9e037a73f520be1"},{"url":"https://git.kernel.org/stable/c/ba664d83638640cf454b65167339cbf20dfd6f10"},{"url":"https://git.kernel.org/stable/c/35e716a70733472ede300540082d64c33bf3b4c9"},{"url":"https://git.kernel.org/stable/c/d8b6529e80bcb4fb8177121404cbb3377acaebd2"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T09:20:32.370Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.10.271"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.5","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}