{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-43030", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-05-01T14:12:55.977Z", "datePublished": "2026-05-01T14:15:30.564Z", "dateUpdated": "2026-08-05T12:25:23.920Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:25:23.920Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix regsafe() for pointers to packet\n\nIn case rold->reg->range == BEYOND_PKT_END && rcur->reg->range == N\nregsafe() may return true which may lead to current state with\nvalid packet range not being explored. Fix the bug." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The vulnerable verifier path is reached by a local process invoking bpf(BPF_PROG_LOAD) with crafted eBPF instructions. Network packets may later exercise the loaded program, but the security boundary is crossed through a local syscall.\nAC:L - The attacker controls the BPF program and verifier state shape needed to trigger the incorrect pruning. There is no race or condition outside attacker control.\nPR:L - Packet-pointer BPF program types are reachable by users with delegated/unprivileged BPF capability or namespace/container-level BPF-related privileges in plausible deployments. This is not a real-root-only init-namespace requirement in the highest reasonable scenario.\nUI:N - No victim action is needed after the attacker can load the crafted BPF program. The verifier is invoked directly by the attacker's syscall.\nS:U - The impact is within the kernel security authority, such as local kernel privilege escalation or kernel memory corruption. It does not cross a separate scope like a VM or IOMMU boundary.\nC:H - The verifier bug can allow unchecked out-of-bounds packet memory reads in kernel context. Such verifier unsoundness is capable of exposing kernel memory and building stronger read primitives.\nI:H - Several affected packet BPF program types allow direct packet writes, so bypassing packet bounds checks can become kernel memory corruption. This is defensibly exploitable toward arbitrary write or code execution.\nA:H - Unchecked out-of-bounds packet access in kernel context can crash, oops, or panic the kernel. Even without full exploitation, a malicious loaded BPF program can cause high availability impact." } ] } ], "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": "95b6ec733752b31bfd166c4609d2c1b5cdde9b47", "lessThan": "b52f6d0ef7b308f9d05bbddb78749852f28e8e40", "status": "affected", "versionType": "git" }, { "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "37db6b9726d0bcf91cbdf9d63b558c50da49f968", "status": "affected", "versionType": "git" }, { "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "015a74476dc1ab6923d89f1ee009aaf43faa7185", "status": "affected", "versionType": "git" }, { "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "b99d82706bd1511bb875e3de7154698fd9215c99", "status": "affected", "versionType": "git" }, { "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "7241da033fdc507b920e092dab1f97b945cb0370", "status": "affected", "versionType": "git" }, { "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "8aebe18069394f4a79d2d82080a0f806da449996", "status": "affected", "versionType": "git" }, { "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "ca995b1462ec6db1e869100ba1fb7356bd3f22f0", "status": "affected", "versionType": "git" }, { "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "a8502a79e832b861e99218cbd2d8f4312d62e225", "status": "affected", "versionType": "git" }, { "version": "5.10.155", "lessThan": "5.10.253", "status": "affected", "versionType": "semver" } ] }, { "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": "5.11", "status": "affected" }, { "version": "0", "lessThan": "5.11", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.253", "lessThanOrEqual": "5.10.*", "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": "5.10.155", "versionEndExcluding": "5.10.253" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "5.15.203" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.1.168" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.6.134" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.12.81" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.18.22" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "6.19.12" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.11", "versionEndExcluding": "7.0" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/b52f6d0ef7b308f9d05bbddb78749852f28e8e40" }, { "url": "https://git.kernel.org/stable/c/37db6b9726d0bcf91cbdf9d63b558c50da49f968" }, { "url": "https://git.kernel.org/stable/c/015a74476dc1ab6923d89f1ee009aaf43faa7185" }, { "url": "https://git.kernel.org/stable/c/b99d82706bd1511bb875e3de7154698fd9215c99" }, { "url": "https://git.kernel.org/stable/c/7241da033fdc507b920e092dab1f97b945cb0370" }, { "url": "https://git.kernel.org/stable/c/8aebe18069394f4a79d2d82080a0f806da449996" }, { "url": "https://git.kernel.org/stable/c/ca995b1462ec6db1e869100ba1fb7356bd3f22f0" }, { "url": "https://git.kernel.org/stable/c/a8502a79e832b861e99218cbd2d8f4312d62e225" } ], "title": "bpf: Fix regsafe() for pointers to packet", 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