184 lines
8.9 KiB
JSON
184 lines
8.9 KiB
JSON
{
|
|
"dataType": "CVE_RECORD",
|
|
"dataVersion": "5.2",
|
|
"cveMetadata": {
|
|
"cveId": "CVE-2026-43321",
|
|
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"state": "PUBLISHED",
|
|
"assignerShortName": "Linux",
|
|
"dateReserved": "2026-05-01T14:12:56.001Z",
|
|
"datePublished": "2026-05-08T13:26:15.600Z",
|
|
"dateUpdated": "2026-10-19T19:16:26.326Z"
|
|
},
|
|
"containers": {
|
|
"cna": {
|
|
"providerMetadata": {
|
|
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
|
|
"shortName": "Linux",
|
|
"dateUpdated": "2026-08-05T12:27:12.004Z"
|
|
},
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Properly mark live registers for indirect jumps\n\nFor a `gotox rX` instruction the rX register should be marked as used\nin the compute_insn_live_regs() function. Fix this."
|
|
}
|
|
],
|
|
"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 caller through the bpf() syscall with BPF_PROG_LOAD and BPF_MAP_TYPE_INSN_ARRAY setup. It is not reachable directly from network packets or a remote protocol.\nAC:L - An attacker who can load the relevant BPF program can craft bytecode and jump-table contents to reach the faulty liveness/pruning behavior without a race or victim-dependent state. The bug is deterministic verifier logic.\nPR:L - Loading the needed BPF objects is privilege-gated, but CAP_BPF/BPF-token delegated environments and namespace-based BPF delegation make this reachable by a low-privileged local attacker in reasonable deployments. Under the required tie-break rule, this is scored as low rather than high privileges.\nUI:N - No victim action is required after the attacker invokes the local BPF syscalls. The attacker supplies the program and map contents directly.\nS:U - Successful exploitation compromises the kernel in the same security authority as the vulnerable verifier. This is standard local kernel privilege escalation, not a VM or IOMMU boundary escape.\nC:H - The missing live-register mark can make verifier state pruning ignore the indirect-jump target register, potentially admitting unsafe BPF execution paths. Verifier unsoundness of this kind can be leveraged for arbitrary kernel memory disclosure.\nI:H - If an unsafe BPF program is accepted, the attacker can plausibly obtain arbitrary kernel memory write or control-flow primitives. This supports full kernel integrity compromise.\nA:H - Even without full exploitation, an accepted unsafe BPF program can corrupt kernel memory or execute invalid accesses and crash or panic the kernel. Availability impact is therefore high."
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"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": "493d9e0d608339a32f568504d5fd411a261bb0af",
|
|
"lessThan": "7beae54111c34ca63357ef120e115889b915beb5",
|
|
"status": "affected",
|
|
"versionType": "git"
|
|
},
|
|
{
|
|
"version": "493d9e0d608339a32f568504d5fd411a261bb0af",
|
|
"lessThan": "d1aab1ca576c90192ba961094d51b0be6355a4d6",
|
|
"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": "6.19",
|
|
"status": "affected"
|
|
},
|
|
{
|
|
"version": "0",
|
|
"lessThan": "6.19",
|
|
"status": "unaffected",
|
|
"versionType": "semver"
|
|
},
|
|
{
|
|
"version": "6.19.6",
|
|
"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": "6.19",
|
|
"versionEndExcluding": "6.19.6"
|
|
},
|
|
{
|
|
"vulnerable": true,
|
|
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
|
|
"versionStartIncluding": "6.19",
|
|
"versionEndExcluding": "7.0"
|
|
}
|
|
]
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"references": [
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/7beae54111c34ca63357ef120e115889b915beb5"
|
|
},
|
|
{
|
|
"url": "https://git.kernel.org/stable/c/d1aab1ca576c90192ba961094d51b0be6355a4d6"
|
|
}
|
|
],
|
|
"title": "bpf: Properly mark live registers for indirect jumps",
|
|
"x_generator": {
|
|
"engine": "bippy-1.2.0"
|
|
}
|
|
},
|
|
"adp": [
|
|
{
|
|
"metrics": [
|
|
{
|
|
"other": {
|
|
"type": "ssvc",
|
|
"content": {
|
|
"id": "CVE-2026-43321",
|
|
"role": "CISA Coordinator",
|
|
"options": [
|
|
{
|
|
"Exploitation": "none"
|
|
},
|
|
{
|
|
"Automatable": "no"
|
|
},
|
|
{
|
|
"Technical Impact": "total"
|
|
}
|
|
],
|
|
"version": "2.0.3",
|
|
"timestamp": "2026-10-16T15:16:22.780603Z"
|
|
}
|
|
}
|
|
}
|
|
],
|
|
"problemTypes": [
|
|
{
|
|
"descriptions": [
|
|
{
|
|
"lang": "en",
|
|
"type": "CWE",
|
|
"cweId": "CWE-682",
|
|
"description": "CWE-682 Incorrect Calculation"
|
|
}
|
|
]
|
|
}
|
|
],
|
|
"title": "CISA ADP Vulnrichment",
|
|
"providerMetadata": {
|
|
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
|
|
"shortName": "CISA-ADP",
|
|
"dateUpdated": "2026-10-19T19:16:26.326Z"
|
|
}
|
|
}
|
|
]
|
|
}
|
|
} |