{"id":"CVE-2023-52996","state":"PUBLISHED","title":"ipv4: prevent potential spectre v1 gadget in fib_metrics_match()","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: prevent potential spectre v1 gadget in fib_metrics_match()\n\nif (!type)\n        continue;\n    if (type > RTAX_MAX)\n        return false;\n    ...\n    fi_val = fi->fib_metrics->metrics[type - 1];\n\n@type being used as an array index, we need to prevent\ncpu speculation or risk leaking kernel memory content.","publishedAt":"2025-03-27T16:43:30.547Z","updatedAt":"2026-05-11T19:36:36.117Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"7f9828fb1f688210e681268490576f0ca65c322a","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"ca3cf947760de050d558293002ad3e7f4b8745d2","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"f9753ebd61be2d957b5504cbd3fd719674f05b7a","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"5e9398a26a92fc402d82ce1f97cc67d832527da0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/fib_semantics.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.4.231","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.166","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.91","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.9","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/fib_semantics.c"]}],"references":["https://git.kernel.org/stable/c/8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d","https://git.kernel.org/stable/c/7f9828fb1f688210e681268490576f0ca65c322a","https://git.kernel.org/stable/c/ca3cf947760de050d558293002ad3e7f4b8745d2","https://git.kernel.org/stable/c/f9753ebd61be2d957b5504cbd3fd719674f05b7a","https://git.kernel.org/stable/c/5e9398a26a92fc402d82ce1f97cc67d832527da0"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52996.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52996","state":"PUBLISHED","datePublished":"2025-03-27T16:43:30.547Z","dateUpdated":"2026-05-11T19:36:36.117Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2025-03-27T16:40:15.742Z"},"containers":{"cna":{"title":"ipv4: prevent potential spectre v1 gadget in fib_metrics_match()","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nipv4: prevent potential spectre v1 gadget in fib_metrics_match()\n\nif (!type)\n        continue;\n    if (type > RTAX_MAX)\n        return false;\n    ...\n    fi_val = fi->fib_metrics->metrics[type - 1];\n\n@type being used as an array index, we need to prevent\ncpu speculation or risk leaking kernel memory content."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"7f9828fb1f688210e681268490576f0ca65c322a","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"ca3cf947760de050d558293002ad3e7f4b8745d2","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"f9753ebd61be2d957b5504cbd3fd719674f05b7a","versionType":"git"},{"version":"5f9ae3d9e7e4ad6db0491abc7c4ae5452dbeadd8","status":"affected","lessThan":"5e9398a26a92fc402d82ce1f97cc67d832527da0","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/fib_semantics.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.14","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.14","versionType":"semver"},{"version":"5.4.231","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.166","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.91","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.9","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.2","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["net/ipv4/fib_semantics.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/8f0eb24f1a7a60ce635f0d757a46f1a37a4d467d"},{"url":"https://git.kernel.org/stable/c/7f9828fb1f688210e681268490576f0ca65c322a"},{"url":"https://git.kernel.org/stable/c/ca3cf947760de050d558293002ad3e7f4b8745d2"},{"url":"https://git.kernel.org/stable/c/f9753ebd61be2d957b5504cbd3fd719674f05b7a"},{"url":"https://git.kernel.org/stable/c/5e9398a26a92fc402d82ce1f97cc67d832527da0"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:36:36.117Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.4.231"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.10.166"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"5.15.91"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.1.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"4.14","versionEndExcluding":"6.2"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}