{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-45971","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-13T15:03:33.089Z","datePublished":"2026-05-27T12:18:30.651Z","dateUpdated":"2026-05-27T12:18:30.651Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-27T12:18:30.651Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Limit bpf program signature size\n\nPractical BPF signatures are significantly smaller than\nKMALLOC_MAX_CACHE_SIZE\n\nAllowing larger sizes opens the door for abuse by passing excessive\nsize values and forcing the kernel into expensive allocation paths (via\nkmalloc_large or vmalloc)."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/syscall.c"],"versions":[{"version":"349271568303695f0ac3563af153d2b4542f6986","lessThan":"5835a077c6f5c565d525eaca9fac01572b97a9b9","status":"affected","versionType":"git"},{"version":"349271568303695f0ac3563af153d2b4542f6986","lessThan":"eb8166c79097996396468a341de258a798789d36","status":"affected","versionType":"git"},{"version":"349271568303695f0ac3563af153d2b4542f6986","lessThan":"ea1535e28bb3773fc0b3cbd1f3842b808016990c","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/syscall.c"],"versions":[{"version":"6.18","status":"affected"},{"version":"0","lessThan":"6.18","status":"unaffected","versionType":"semver"},{"version":"6.18.14","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.4","lessThanOrEqual":"6.19.*","status":"unaffected","versionType":"semver"},{"version":"7.0","lessThanOrEqual":"*","status":"unaffected","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.18.14"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"6.19.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.18","versionEndExcluding":"7.0"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/5835a077c6f5c565d525eaca9fac01572b97a9b9"},{"url":"https://git.kernel.org/stable/c/eb8166c79097996396468a341de258a798789d36"},{"url":"https://git.kernel.org/stable/c/ea1535e28bb3773fc0b3cbd1f3842b808016990c"}],"title":"bpf: Limit bpf program signature size","x_generator":{"engine":"bippy-1.2.0"}}}}