{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-68462", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-07-30T09:28:09.395Z", "datePublished": "2026-08-15T05:51:21.948Z", "dateUpdated": "2026-08-15T05:51:21.948Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-15T05:51:21.948Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative const offsets for buffer pointers\n\nThe verifier rejects variable offsets for PTR_TO_TP_BUFFER and PTR_TO_BUF\naccesses, but it currently accepts a constant negative offset produced by\npointer arithmetic.\n\nCommit 022ac0750883 (\"bpf: use reg->var_off instead of reg->off for\npointers\") moved constant pointer offsets from reg->off to reg->var_off.\nHowever, __check_buffer_access() continued to check only the instruction\noffset. An access with reg->var_off equal to -8 and an instruction offset\nof zero therefore passes verification.\n\nFor writable raw tracepoints, the access end is also calculated from the\nunsigned reg->var_off.value. An eight-byte access starting at -8 wraps\nthe calculated end to zero, allowing the program to load and attach\nwithout increasing max_tp_access.\n\nAfter ensuring that reg->var_off is constant, calculate the effective\naccess start using signed arithmetic and reject it when it is negative.\nUse the validated start to calculate the access end for both\nPTR_TO_TP_BUFFER and PTR_TO_BUF."}], "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": "022ac075088366b62e130da5e1b200bc93a47191", "lessThan": "314bd592085c0720ef519f6edbc5f41440ff78d4", "status": "affected", "versionType": "git"}, {"version": "022ac075088366b62e130da5e1b200bc93a47191", "lessThan": "fd4cfa8c8f9a17cdec0539334d28754bc1d8a5d9", "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": "7.1", "status": "affected"}, {"version": "0", "lessThan": "7.1", "status": "unaffected", "versionType": "semver"}, {"version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.2-rc4", "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": "7.1", "versionEndExcluding": "7.1.5"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "7.1", "versionEndExcluding": "7.2-rc4"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/314bd592085c0720ef519f6edbc5f41440ff78d4"}, {"url": "https://git.kernel.org/stable/c/fd4cfa8c8f9a17cdec0539334d28754bc1d8a5d9"}], "title": "bpf: Reject negative const offsets for buffer pointers", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "314bd592085c0720ef519f6edbc5f41440ff78d4", "status": "affected", "version": "022ac075088366b62e130da5e1b200bc93a47191", "versionType": "git"}, {"lessThan": "fd4cfa8c8f9a17cdec0539334d28754bc1d8a5d9", "status": "affected", "version": "022ac075088366b62e130da5e1b200bc93a47191", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["kernel/bpf/verifier.c"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "7.1"}, {"lessThan": "7.1", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "7.1.*", "status": "unaffected", "version": "7.1.5", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "7.2-rc4", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reject negative const offsets for buffer pointers\n\nThe verifier rejects variable offsets for PTR_TO_TP_BUFFER and PTR_TO_BUF\naccesses, but it currently accepts a constant negative offset produced by\npointer arithmetic.\n\nCommit 022ac0750883 (\"bpf: use reg->var_off instead of reg->off for\npointers\") moved constant pointer offsets from reg->off to reg->var_off.\nHowever, __check_buffer_access() continued to check only the instruction\noffset. An access with reg->var_off equal to -8 and an instruction offset\nof zero therefore passes verification.\n\nFor writable raw tracepoints, the access end is also calculated from the\nunsigned reg->var_off.value. An eight-byte access starting at -8 wraps\nthe calculated end to zero, allowing the program to load and attach\nwithout increasing max_tp_access.\n\nAfter ensuring that reg->var_off is constant, calculate the effective\naccess start using signed arithmetic and reject it when it is negative.\nUse the validated start to calculate the access end for both\nPTR_TO_TP_BUFFER and PTR_TO_BUF."}], "id": "CVE-2026-68462", "lastModified": "2026-08-15T06:18:39.803", "metrics": {}, "published": "2026-08-15T06:18:39.803", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/314bd592085c0720ef519f6edbc5f41440ff78d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/fd4cfa8c8f9a17cdec0539334d28754bc1d8a5d9"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[022ac075088366b62e130da5e1b200bc93a47191,314bd592085c0720ef519f6edbc5f41440ff78d4)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[022ac075088366b62e130da5e1b200bc93a47191,fd4cfa8c8f9a17cdec0539334d28754bc1d8a5d9)"}}], "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": "7.1"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,7.1)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.1.5,*]"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.2-rc4,*]"}}], "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": "2026-08-15T07:45:04.538417+00:00", "updated": "2026-08-15T07:45:04.538453+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}