{"api_version":"1","generated_at":"2026-08-16T06:03:08+00:00","cve":"CVE-2026-74305","urls":{"html":"https://cve.report/CVE-2026-74305","api":"https://cve.report/api/cve/CVE-2026-74305.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-74305","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-74305"},"summary":{"title":"bpf: Tighten cgroup storage cookie checks for prog arrays","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Tighten cgroup storage cookie checks for prog arrays\n\nThe fix in commit abad3d0bad72 (\"bpf: Fix oob access in cgroup local\nstorage\") is still incomplete. The prog-array compatibility check\ntreats a program with no cgroup storage as compatible with any stored\nstorage cookie. This allows a storage-less program to bridge a tail\ncall chain between an entry program and a storage-using callee even\nthough cgroup local storage at runtime still follows the caller's\ncontext, that is, A -> B(no storage) -> C(storage) path.\n\nRequiring exact cookie equality would break the legitimate case of a\nstorage-less leaf program being tail called from a storage-using one.\nInstead, only accept a zero storage cookie if the program cannot\nperform tail calls itself. This keeps A -> B(no storage) working\nwhile rejecting the A -> B(no storage) -> C(storage) bridge.","state":"PUBLISHED","assigner":"Linux","published_at":"2026-08-15 06:22:30","updated_at":"2026-08-15 06:22:30"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652","name":"https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b","name":"https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08","name":"https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf","name":"https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10","name":"https://git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85","name":"https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609","name":"https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-74305","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-74305","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected c1c74584b9b4043c52e41fec415226e582d266a3 87177497cca90bf4fcfb759eb898560eb5b46a10 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 66da7cee78590259b400e51a70622ccd41da7bb2 1c762d28698483ce7c372091f34d86e4d4828652 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 7acfa07c585e3d7a64654d38f0a5c762877d0b9b eb73056ce2a6f101ddd3bdba89af6b24ebffff85 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 41688d1fc5d163a6c2c0e95c0419e2cb31a44648 9ca06849c4239aa2d580c54651f8588c51cb398b git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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6.12.97 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.16.1 6.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 6.17","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.17 semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 5.15.212 5.15.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.1.178 6.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.6.145 6.6.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.12.97 6.12.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 6.18.40 6.18.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.1.5 7.1.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.2-rc1 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"74305","cve":"CVE-2026-74305","epss":"0.001720000","percentile":"0.069290000","score_date":"2026-08-15","updated_at":"2026-08-16 00:00:30"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["kernel/bpf/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"87177497cca90bf4fcfb759eb898560eb5b46a10","status":"affected","version":"c1c74584b9b4043c52e41fec415226e582d266a3","versionType":"git"},{"lessThan":"1c762d28698483ce7c372091f34d86e4d4828652","status":"affected","version":"66da7cee78590259b400e51a70622ccd41da7bb2","versionType":"git"},{"lessThan":"eb73056ce2a6f101ddd3bdba89af6b24ebffff85","status":"affected","version":"7acfa07c585e3d7a64654d38f0a5c762877d0b9b","versionType":"git"},{"lessThan":"9ca06849c4239aa2d580c54651f8588c51cb398b","status":"affected","version":"41688d1fc5d163a6c2c0e95c0419e2cb31a44648","versionType":"git"},{"lessThan":"46fbafe3d2d569d828e8d24a7dbe1659f63685cf","status":"affected","version":"abad3d0bad72a52137e0c350c59542d75ae4f513","versionType":"git"},{"lessThan":"cb22dc79528eb26a46d346c3118dbd6b14c70609","status":"affected","version":"abad3d0bad72a52137e0c350c59542d75ae4f513","versionType":"git"},{"lessThan":"10627ddc0167aab5c1c390a10ef461e9937aba08","status":"affected","version":"abad3d0bad72a52137e0c350c59542d75ae4f513","versionType":"git"},{"status":"affected","version":"19341d5c59e8c7e8528e40f8663e99d67810473c","versionType":"git"},{"lessThan":"5.15.212","status":"affected","version":"5.15.192","versionType":"semver"},{"lessThan":"6.1.178","status":"affected","version":"6.1.151","versionType":"semver"},{"lessThan":"6.6.145","status":"affected","version":"6.6.105","versionType":"semver"},{"lessThan":"6.12.97","status":"affected","version":"6.12.46","versionType":"semver"},{"lessThan":"6.17","status":"affected","version":"6.16.1","versionType":"semver"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["kernel/bpf/core.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"6.17"},{"lessThan":"6.17","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"5.15.*","status":"unaffected","version":"5.15.212","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.178","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.145","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.97","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.40","versionType":"semver"},{"lessThanOrEqual":"7.1.*","status":"unaffected","version":"7.1.5","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.2-rc1","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"5.15.212","versionStartIncluding":"5.15.192","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.178","versionStartIncluding":"6.1.151","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.145","versionStartIncluding":"6.6.105","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.97","versionStartIncluding":"6.12.46","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.40","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.1.5","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.2-rc1","versionStartIncluding":"6.17","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.16.1","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Tighten cgroup storage cookie checks for prog arrays\n\nThe fix in commit abad3d0bad72 (\"bpf: Fix oob access in cgroup local\nstorage\") is still incomplete. The prog-array compatibility check\ntreats a program with no cgroup storage as compatible with any stored\nstorage cookie. This allows a storage-less program to bridge a tail\ncall chain between an entry program and a storage-using callee even\nthough cgroup local storage at runtime still follows the caller's\ncontext, that is, A -> B(no storage) -> C(storage) path.\n\nRequiring exact cookie equality would break the legitimate case of a\nstorage-less leaf program being tail called from a storage-using one.\nInstead, only accept a zero storage cookie if the program cannot\nperform tail calls itself. This keeps A -> B(no storage) working\nwhile rejecting the A -> B(no storage) -> C(storage) bridge."}],"providerMetadata":{"dateUpdated":"2026-08-15T05:58:06.654Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/87177497cca90bf4fcfb759eb898560eb5b46a10"},{"url":"https://git.kernel.org/stable/c/1c762d28698483ce7c372091f34d86e4d4828652"},{"url":"https://git.kernel.org/stable/c/eb73056ce2a6f101ddd3bdba89af6b24ebffff85"},{"url":"https://git.kernel.org/stable/c/9ca06849c4239aa2d580c54651f8588c51cb398b"},{"url":"https://git.kernel.org/stable/c/46fbafe3d2d569d828e8d24a7dbe1659f63685cf"},{"url":"https://git.kernel.org/stable/c/cb22dc79528eb26a46d346c3118dbd6b14c70609"},{"url":"https://git.kernel.org/stable/c/10627ddc0167aab5c1c390a10ef461e9937aba08"}],"title":"bpf: Tighten cgroup storage cookie checks for prog arrays","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-74305","datePublished":"2026-08-15T05:58:06.654Z","dateReserved":"2026-08-15T05:44:03.882Z","dateUpdated":"2026-08-15T05:58:06.654Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-15 06:22:30","lastModifiedDate":"2026-08-15 06:22:30","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"74305","Ordinal":"1","Title":"bpf: Tighten cgroup storage cookie checks for prog arrays","CVE":"CVE-2026-74305","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"74305","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Tighten cgroup storage cookie checks for prog arrays\n\nThe fix in commit abad3d0bad72 (\"bpf: Fix oob access in cgroup local\nstorage\") is still incomplete. The prog-array compatibility check\ntreats a program with no cgroup storage as compatible with any stored\nstorage cookie. This allows a storage-less program to bridge a tail\ncall chain between an entry program and a storage-using callee even\nthough cgroup local storage at runtime still follows the caller's\ncontext, that is, A -> B(no storage) -> C(storage) path.\n\nRequiring exact cookie equality would break the legitimate case of a\nstorage-less leaf program being tail called from a storage-using one.\nInstead, only accept a zero storage cookie if the program cannot\nperform tail calls itself. This keeps A -> B(no storage) working\nwhile rejecting the A -> B(no storage) -> C(storage) bridge.","Type":"Description","Title":"bpf: Tighten cgroup storage cookie checks for prog arrays"}]}}}