CVE-2026-43030

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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": 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"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": 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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. 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Even without full exploitation, a malicious loaded BPF program can cause high availability impact."}]}], "affected": [{"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "95b6ec733752b31bfd166c4609d2c1b5cdde9b47", "lessThan": "b52f6d0ef7b308f9d05bbddb78749852f28e8e40", "versionType": "git"}, {"status": "affected", "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "37db6b9726d0bcf91cbdf9d63b558c50da49f968", "versionType": "git"}, {"status": "affected", "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "015a74476dc1ab6923d89f1ee009aaf43faa7185", "versionType": "git"}, {"status": "affected", "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "b99d82706bd1511bb875e3de7154698fd9215c99", "versionType": "git"}, {"status": "affected", "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "7241da033fdc507b920e092dab1f97b945cb0370", "versionType": "git"}, {"status": "affected", "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "8aebe18069394f4a79d2d82080a0f806da449996", "versionType": "git"}, {"status": "affected", "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "ca995b1462ec6db1e869100ba1fb7356bd3f22f0", "versionType": "git"}, {"status": "affected", "version": "6d94e741a8ff818e5518da8257f5ca0aaed1f269", "lessThan": "a8502a79e832b861e99218cbd2d8f4312d62e225", "versionType": "git"}, {"status": "affected", "version": "5.10.155", "lessThan": "5.10.253", "versionType": "semver"}], "programFiles": ["kernel/bpf/verifier.c"], "defaultStatus": "unaffected"}, {"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "product": "Linux", "versions": [{"status": "affected", "version": "5.11"}, {"status": "unaffected", "version": "0", "lessThan": "5.11", "versionType": "semver"}, {"status": "unaffected", "version": "5.10.253", "versionType": "semver", "lessThanOrEqual": "5.10.*"}, {"status": "unaffected", "version": "5.15.203", "versionType": "semver", "lessThanOrEqual": "5.15.*"}, {"status": "unaffected", "version": "6.1.168", "versionType": "semver", "lessThanOrEqual": "6.1.*"}, {"status": "unaffected", "version": "6.6.134", "versionType": "semver", "lessThanOrEqual": "6.6.*"}, {"status": "unaffected", "version": "6.12.81", "versionType": "semver", "lessThanOrEqual": "6.12.*"}, {"status": "unaffected", "version": "6.18.22", "versionType": "semver", "lessThanOrEqual": "6.18.*"}, {"status": "unaffected", "version": "6.19.12", "versionType": "semver", "lessThanOrEqual": "6.19.*"}, {"status": "unaffected", "version": "7.0", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*"}], "programFiles": ["kernel/bpf/verifier.c"], "defaultStatus": "affected"}], "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"}], "x_generator": {"engine": "bippy-1.2.0"}, "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. 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Fix the bug."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nbpf: Arreglar regsafe() para punteros a paquete\n\nEn caso de que rold -> reg -> range == BEYOND_PKT_END && rcur -> reg -> range == N, regsafe() puede devolver verdadero, lo que puede llevar a que el estado actual con un rango de paquete v\u00e1lido no sea explorado. Arreglar el error."}], "id": "CVE-2026-43030", "lastModified": "2026-11-11T23:10:00.263", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-43030", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2026-10-16T15:13:43.383787Z", "version": "2.0.3"}}]}, "published": "2026-05-01T15:16:47.557", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/015a74476dc1ab6923d89f1ee009aaf43faa7185"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/37db6b9726d0bcf91cbdf9d63b558c50da49f968"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7241da033fdc507b920e092dab1f97b945cb0370"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/8aebe18069394f4a79d2d82080a0f806da449996"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a8502a79e832b861e99218cbd2d8f4312d62e225"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b52f6d0ef7b308f9d05bbddb78749852f28e8e40"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b99d82706bd1511bb875e3de7154698fd9215c99"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ca995b1462ec6db1e869100ba1fb7356bd3f22f0"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-019113.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-082556.html"}, {"source": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "url": "https://cert-portal.siemens.com/productcert/html/ssa-457936.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-682"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: bpf: Fix regsafe() for pointers to packet", "id": "2464384", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2464384"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-372", "details": ["A flaw was found in the Linux kernel's Berkeley Packet Filter (BPF) subsystem. A logic error in the `regsafe()` function, specifically when handling pointers to packets, could lead to an incorrect state where valid packet ranges are not properly explored. This vulnerability may allow an attacker to bypass certain security checks or cause unexpected system behavior."], "name": "CVE-2026-43030", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Fix deferred", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-05-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-43030\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-43030\nhttps://lore.kernel.org/linux-cve-announce/2026050100-CVE-2026-43030-58b8@gregkh/T"], "threat_severity": "Low"}

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