{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43333","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2026-05-01T14:12:56.002Z","datePublished":"2026-05-08T13:31:20.107Z","dateUpdated":"2026-05-11T22:22:32.462Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-05-11T22:22:32.462Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: reject direct access to nullable PTR_TO_BUF pointers\n\ncheck_mem_access() matches PTR_TO_BUF via base_type() which strips\nPTR_MAYBE_NULL, allowing direct dereference without a null check.\n\nMap iterator ctx->key and ctx->value are PTR_TO_BUF | PTR_MAYBE_NULL.\nOn stop callbacks these are NULL, causing a kernel NULL dereference.\n\nAdd a type_may_be_null() guard to the PTR_TO_BUF branch, matching the\nexisting PTR_TO_BTF_ID pattern."}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["kernel/bpf/verifier.c"],"versions":[{"version":"b453361384c2db1c703dacb806d5fd36aec4ceca","lessThan":"10bc4a4dcded509c5d5c67d497900c3922c604cd","status":"affected","versionType":"git"},{"version":"20b2aff4bc15bda809f994761d5719827d66c0b4","lessThan":"21a10c06ffae24cb01fd174a7ab7736001d2ea56","status":"affected","versionType":"git"},{"version":"20b2aff4bc15bda809f994761d5719827d66c0b4","lessThan":"8755066f7bd0f4ac46a29d1708c7b20894539252","status":"affected","versionType":"git"},{"version":"20b2aff4bc15bda809f994761d5719827d66c0b4","lessThan":"70abd9d118da2f56beb4ec22e3a29becae373535","status":"affected","versionType":"git"},{"version":"20b2aff4bc15bda809f994761d5719827d66c0b4","lessThan":"63276547debc4d8a73eefb2c5273b2a905c961b0","status":"affected","versionType":"git"},{"version":"20b2aff4bc15bda809f994761d5719827d66c0b4","lessThan":"4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09","status":"affected","versionType":"git"},{"version":"20b2aff4bc15bda809f994761d5719827d66c0b4","lessThan":"b0db1accbc7395657c2b79db59fa9fae0d6656f3","status":"affected","versionType":"git"},{"version":"e982070f8970bb62e69ed7c9cafff886ed200349","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/verifier.c"],"versions":[{"version":"5.17","status":"affected"},{"version":"0","lessThan":"5.17","status":"unaffected","versionType":"semver"},{"version":"5.15.203","lessThanOrEqual":"5.15.*","status":"unaffected","versionType":"semver"},{"version":"6.1.168","lessThanOrEqual":"6.1.*","status":"unaffected","versionType":"semver"},{"version":"6.6.134","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.12.81","lessThanOrEqual":"6.12.*","status":"unaffected","versionType":"semver"},{"version":"6.18.22","lessThanOrEqual":"6.18.*","status":"unaffected","versionType":"semver"},{"version":"6.19.12","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":"5.15.37","versionEndExcluding":"5.15.203"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.1.168"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.6.134"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.12.81"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.18.22"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"6.19.12"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.17","versionEndExcluding":"7.0"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.16.11"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/10bc4a4dcded509c5d5c67d497900c3922c604cd"},{"url":"https://git.kernel.org/stable/c/21a10c06ffae24cb01fd174a7ab7736001d2ea56"},{"url":"https://git.kernel.org/stable/c/8755066f7bd0f4ac46a29d1708c7b20894539252"},{"url":"https://git.kernel.org/stable/c/70abd9d118da2f56beb4ec22e3a29becae373535"},{"url":"https://git.kernel.org/stable/c/63276547debc4d8a73eefb2c5273b2a905c961b0"},{"url":"https://git.kernel.org/stable/c/4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09"},{"url":"https://git.kernel.org/stable/c/b0db1accbc7395657c2b79db59fa9fae0d6656f3"}],"title":"bpf: reject direct access to nullable PTR_TO_BUF pointers","x_generator":{"engine":"bippy-1.2.0"}}}}