{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-42072", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-07-29T15:50:41.168Z", "datePublished": "2024-07-29T15:52:35.598Z", "dateUpdated": "2026-08-05T11:35:30.329Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:35:30.329Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Fix may_goto with negative offset.\n\nZac's syzbot crafted a bpf prog that exposed two bugs in may_goto.\nThe 1st bug is the way may_goto is patched. When offset is negative\nit should be patched differently.\nThe 2nd bug is in the verifier:\nwhen current state may_goto_depth is equal to visited state may_goto_depth\nit means there is an actual infinite loop. It's not correct to prune\nexploration of the program at this point.\nNote, that this check doesn't limit the program to only one may_goto insn,\nsince 2nd and any further may_goto will increment may_goto_depth only\nin the queued state pushed for future exploration. The current state\nwill have may_goto_depth == 0 regardless of number of may_goto insns\nand the verifier has to explore the program until bpf_exit." } ], "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 vulnerability is reached through the bpf(BPF_PROG_LOAD) syscall, which requires local access to the machine; the mis-patched program is then run by attaching it to the attacker's own socket. No network-facing service parses the malicious input.\nAC:L - The attacker fully authors the BPF program and chooses the negative may_goto offset, so the 3-instruction control-flow skew is deterministic and reproducible on every load — no race, timing window, or unpredictable memory layout is involved.\nPR:L - may_goto carries no capability check in the verifier, and an unprivileged local user can load a BPF_PROG_TYPE_SOCKET_FILTER program whenever kernel.unprivileged_bpf_disabled is 0, or via a delegated BPF token / container-granted CAP_BPF (syscall.c:2753). Basic local user access is sufficient.\nUI:N - The attacker loads and attaches the program entirely on their own; execution is triggered by their own socket traffic with no action by any other user or administrator.\nS:U - The corruption occurs in kernel memory of the same host and results in a conventional local privilege escalation; no VM, IOMMU, or other security-authority boundary is crossed.\nC:H - The verified-vs-executed control-flow divergence lets the attacker skip the bounds/mask instructions guarding a load, turning it into a read from an attacker-chosen address — an arbitrary kernel memory read primitive that discloses arbitrary kernel data.\nI:H - The same primitive applied to a store gives an arbitrary kernel memory write with attacker-controlled address and value, a full verifier bypass that enables control-flow hijacking and privilege escalation.\nA:H - With off == -3 the patched JEQ becomes a self-jump, producing an unbreakable in-kernel loop (hard lockup / RCU stall), and the broken is_state_visited() check independently lets genuinely infinite loops pass verification; corrupted memory accesses also readily panic the kernel." } ] } ], "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": "011832b97b311bb9e3c27945bc0d1089a14209c9", "lessThan": "175827e04f4be53f3dfb57edf12d0d49b18fd939", "status": "affected", "versionType": "git" }, { "version": "011832b97b311bb9e3c27945bc0d1089a14209c9", "lessThan": "2b2efe1937ca9f8815884bd4dcd5b32733025103", "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": "6.9", "status": "affected" }, { "version": "0", "lessThan": "6.9", "status": "unaffected", "versionType": "semver" }, { "version": "6.9.8", "lessThanOrEqual": "6.9.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.10", "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": "6.9", "versionEndExcluding": "6.9.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.9", "versionEndExcluding": "6.10" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/175827e04f4be53f3dfb57edf12d0d49b18fd939" }, { "url": "https://git.kernel.org/stable/c/2b2efe1937ca9f8815884bd4dcd5b32733025103" } ], "title": "bpf: Fix may_goto with negative offset.", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T04:54:31.986Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/175827e04f4be53f3dfb57edf12d0d49b18fd939", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2b2efe1937ca9f8815884bd4dcd5b32733025103", "tags": [ "x_transferred" ] } ] }, { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2024-42072", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2024-09-10T16:19:39.749938Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-11T17:33:57.942Z" } } ] } }