{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-43070", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.982Z", "datePublished": "2026-05-05T15:23:28.819Z", "dateUpdated": "2026-05-05T15:23:28.819Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-05T15:23:28.819Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reset register ID for BPF_END value tracking\n\nWhen a register undergoes a BPF_END (byte swap) operation, its scalar\nvalue is mutated in-place. If this register previously shared a scalar ID\nwith another register (e.g., after an `r1 = r0` assignment), this tie must\nbe broken.\n\nCurrently, the verifier misses resetting `dst_reg->id` to 0 for BPF_END.\nConsequently, if a conditional jump checks the swapped register, the\nverifier incorrectly propagates the learned bounds to the linked register,\nleading to false confidence in the linked register's value and potentially\nallowing out-of-bounds memory accesses.\n\nFix this by explicitly resetting `dst_reg->id` to 0 in the BPF_END case\nto break the scalar tie, similar to how BPF_NEG handles it via\n`__mark_reg_known`."}], "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": "4c03342e5ac532fb34d13a7b51dd7261dfc48963", "lessThan": "a17443af874229408ce6b78e2c8a2b5adeb4b7d8", "status": "affected", "versionType": "git"}, {"version": "d00ce96623a69a100ad79675d0e85fda3c50d89b", "lessThan": "0d15c3611a2cc5d08993545d4032055ae10ae2c1", "status": "affected", "versionType": "git"}, {"version": "9d21199842247ab05c675fb9b6c6ca393a5c0024", "lessThan": "a3125bc01884431d30d731461634c8295b6f0529", "status": "affected", "versionType": "git"}]}, {"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": "6.18.17", "lessThan": "6.18.21", "status": "affected", "versionType": "semver"}, {"version": "6.19.7", "lessThan": "6.19.11", "status": "affected", "versionType": "semver"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.18.17", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.19.7", "versionEndExcluding": "6.19.11"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/a17443af874229408ce6b78e2c8a2b5adeb4b7d8"}, {"url": "https://git.kernel.org/stable/c/0d15c3611a2cc5d08993545d4032055ae10ae2c1"}, {"url": "https://git.kernel.org/stable/c/a3125bc01884431d30d731461634c8295b6f0529"}], "title": "bpf: Reset register ID for BPF_END value tracking", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Reset register ID for BPF_END value tracking\n\nWhen a register undergoes a BPF_END (byte swap) operation, its scalar\nvalue is mutated in-place. If this register previously shared a scalar ID\nwith another register (e.g., after an `r1 = r0` assignment), this tie must\nbe broken.\n\nCurrently, the verifier misses resetting `dst_reg->id` to 0 for BPF_END.\nConsequently, if a conditional jump checks the swapped register, the\nverifier incorrectly propagates the learned bounds to the linked register,\nleading to false confidence in the linked register's value and potentially\nallowing out-of-bounds memory accesses.\n\nFix this by explicitly resetting `dst_reg->id` to 0 in the BPF_END case\nto break the scalar tie, similar to how BPF_NEG handles it via\n`__mark_reg_known`."}], "id": "CVE-2026-43070", "lastModified": "2026-05-05T16:16:16.320", "metrics": {}, "published": "2026-05-05T16:16:16.320", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0d15c3611a2cc5d08993545d4032055ae10ae2c1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a17443af874229408ce6b78e2c8a2b5adeb4b7d8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a3125bc01884431d30d731461634c8295b6f0529"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[4c03342e5ac532fb34d13a7b51dd7261dfc48963,a17443af874229408ce6b78e2c8a2b5adeb4b7d8)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[d00ce96623a69a100ad79675d0e85fda3c50d89b,0d15c3611a2cc5d08993545d4032055ae10ae2c1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9d21199842247ab05c675fb9b6c6ca393a5c0024,a3125bc01884431d30d731461634c8295b6f0529)"}}], "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": "semver", "value": "[6.18.17,6.18.21)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[6.19.7,6.19.11)"}}], "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": "2026-05-05T18:00:12.703555+00:00", "updated": "2026-05-05T18:00:13.729439+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"], "weaknesses": ["CWE-665"]}