{"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": "2026-05-08T13:31:20.107Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-08T13:31:20.107Z"}, "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"}}}}

{}

{"cveTags": [], "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."}], "id": "CVE-2026-43333", "lastModified": "2026-05-08T14:16:43.003", "metrics": {}, "published": "2026-05-08T14:16:43.003", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/10bc4a4dcded509c5d5c67d497900c3922c604cd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/21a10c06ffae24cb01fd174a7ab7736001d2ea56"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/63276547debc4d8a73eefb2c5273b2a905c961b0"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/70abd9d118da2f56beb4ec22e3a29becae373535"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/8755066f7bd0f4ac46a29d1708c7b20894539252"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/b0db1accbc7395657c2b79db59fa9fae0d6656f3"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[b453361384c2db1c703dacb806d5fd36aec4ceca,10bc4a4dcded509c5d5c67d497900c3922c604cd)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20b2aff4bc15bda809f994761d5719827d66c0b4,21a10c06ffae24cb01fd174a7ab7736001d2ea56)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20b2aff4bc15bda809f994761d5719827d66c0b4,8755066f7bd0f4ac46a29d1708c7b20894539252)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20b2aff4bc15bda809f994761d5719827d66c0b4,70abd9d118da2f56beb4ec22e3a29becae373535)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20b2aff4bc15bda809f994761d5719827d66c0b4,63276547debc4d8a73eefb2c5273b2a905c961b0)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20b2aff4bc15bda809f994761d5719827d66c0b4,4f6c99dc0420f1a3d671c1b8ab8a7ac84d9cba09)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[20b2aff4bc15bda809f994761d5719827d66c0b4,b0db1accbc7395657c2b79db59fa9fae0d6656f3)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "e982070f8970bb62e69ed7c9cafff886ed200349"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "5.17"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,5.17)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[5.15.203,5.16.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.1.168,6.2.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.134,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.81,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.22,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.12,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "created": "2026-05-08T18:45:14.178665+00:00", "updated": "2026-05-08T21:30:05.357438+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-476"]}