{ "dataType": "CVE_RECORD", "cveMetadata": { "cveId": "CVE-2024-27431", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-02-25T13:47:42.686Z", "datePublished": "2024-05-17T12:02:10.274Z", "dateUpdated": "2026-08-05T11:29:46.451Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:29:46.451Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ncpumap: Zero-initialise xdp_rxq_info struct before running XDP program\n\nWhen running an XDP program that is attached to a cpumap entry, we don't\ninitialise the xdp_rxq_info data structure being used in the xdp_buff\nthat backs the XDP program invocation. Tobias noticed that this leads to\nrandom values being returned as the xdp_md->rx_queue_index value for XDP\nprograms running in a cpumap.\n\nThis means we're basically returning the contents of the uninitialised\nmemory, which is bad. Fix this by zero-initialising the rxq data\nstructure before running the XDP program." } ], "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 - Exploitation requires the attacker to load a BPF program and populate a CPUMAP entry via the local bpf() syscall, then attach XDP to a local netdev; network packets only serve as the trigger the attacker generates themselves. No remote peer can reach this code path.\nAC:L - The uninitialized read is deterministic on every cpumap XDP invocation, and the attacker fully controls the setup (own veth/MTU, own XDP program, own traffic), so it can be triggered repeatedly and reliably, including grooming the kthread stack residue across unlimited retries.\nPR:L - Requires CAP_BPF plus CAP_NET_ADMIN, which are routinely delegated to non-root network daemons and container workloads (Cilium-style XDP/cpumap pipelines) rather than requiring full root; consistent with scoring of other BPF/XDP subsystem issues.\nUI:N - The attacker performs every step — map creation, program attach, and packet injection through their own interface — with no action needed from any other user.\nS:U - Both the uninitialized stack disclosure and the out-of-bounds fragment write are contained within the kernel's own security authority; no hypervisor, IOMMU, or sandbox boundary is crossed.\nC:H - Uninitialized cpumap kthread stack memory is handed directly to the BPF program via xdp_md->rx_queue_index and exfiltrated to userspace, repeatedly and with groomable content, leaking kernel pointers; the accompanying frag_size corruption additionally provides memory-corruption primitives leverageable for broader disclosure.\nI:H - Garbage rxq.frag_size makes the unsigned tailroom computation in bpf_xdp_frags_increase_tail() underflow, bypassing the bounds check and permitting memset() of an attacker-chosen length past the last fragment — an out-of-bounds heap write, plus inconsistent sinfo->xdp_frags_size accounting propagated into subsequent skb construction.\nA:H - The out-of-bounds zeroing of adjacent page/heap memory corrupts unrelated kernel structures and leads to oops or panic, and the bogus queue_index/frag_size values also cause misrouted XSK redirects and inconsistent frame accounting in the receive path." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "kernel/bpf/cpumap.c" ], "versions": [ { "version": "9216477449f33cdbc9c9a99d49f500b7fbb81702", "lessThan": "5f4e51abfbe6eb444fa91906a5cd083044278297", "status": "affected", "versionType": "git" }, { "version": "9216477449f33cdbc9c9a99d49f500b7fbb81702", "lessThan": "f0363af9619c77730764f10360e36c6445c12f7b", "status": "affected", "versionType": "git" }, { "version": "9216477449f33cdbc9c9a99d49f500b7fbb81702", "lessThan": "3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95", "status": "affected", "versionType": "git" }, { "version": "9216477449f33cdbc9c9a99d49f500b7fbb81702", "lessThan": "f562e4c4aab00986dde3093c4be919c3f2b85a4a", "status": "affected", "versionType": "git" }, { "version": "9216477449f33cdbc9c9a99d49f500b7fbb81702", "lessThan": "eaa7cb836659ced2d9f814ac32aa3ec193803ed6", "status": "affected", "versionType": "git" }, { "version": "9216477449f33cdbc9c9a99d49f500b7fbb81702", "lessThan": "2487007aa3b9fafbd2cb14068f49791ce1d7ede5", "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/cpumap.c" ], "versions": [ { "version": "5.9", "status": "affected" }, { "version": "0", "lessThan": "5.9", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.213", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.152", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.82", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.22", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.7.10", "lessThanOrEqual": "6.7.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.8", "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": "5.9", "versionEndExcluding": "5.10.213" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "5.15.152" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.1.82" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.6.22" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.7.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.9", "versionEndExcluding": "6.8" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/5f4e51abfbe6eb444fa91906a5cd083044278297" }, { "url": "https://git.kernel.org/stable/c/f0363af9619c77730764f10360e36c6445c12f7b" }, { "url": "https://git.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95" }, { "url": "https://git.kernel.org/stable/c/f562e4c4aab00986dde3093c4be919c3f2b85a4a" }, { "url": "https://git.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6" }, { "url": "https://git.kernel.org/stable/c/2487007aa3b9fafbd2cb14068f49791ce1d7ede5" } ], "title": "cpumap: Zero-initialise xdp_rxq_info struct before running XDP program", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "problemTypes": [ { "descriptions": [ { "type": "CWE", "cweId": "CWE-908", "lang": "en", "description": "CWE-908 Use of Uninitialized Resource" } ] } ], "affected": [ { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "9216477449f3", "status": "affected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:a:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.9", "status": "affected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:a:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "0", "status": "unaffected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.10.213", "status": "unaffected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "5.15.152", "status": "unaffected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6.1.82", "status": "unaffected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6.6.22", "status": "unaffected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:a:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6.7.10", "status": "unaffected" } ] }, { "vendor": "linux", "product": "linux_kernel", "cpes": [ "cpe:2.3:a:linux:linux_kernel:-:*:*:*:*:*:*:*" ], "defaultStatus": "unknown", "versions": [ { "version": "6.8", "status": "unaffected" } ] } ], "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 5.5, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "NONE" } }, { "other": { "type": "ssvc", "content": { "timestamp": "2024-05-17T16:29:06.840486Z", "id": "CVE-2024-27431", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "partial" } ], "role": "CISA Coordinator", "version": "2.0.3" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-01-23T21:49:35.963Z" } }, { "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T00:34:52.315Z" }, "title": "CVE Program Container", "references": [ { "url": "https://git.kernel.org/stable/c/5f4e51abfbe6eb444fa91906a5cd083044278297", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f0363af9619c77730764f10360e36c6445c12f7b", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/3420b3ff1ff489c177ea1cb7bd9fbbc4e9a0be95", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/f562e4c4aab00986dde3093c4be919c3f2b85a4a", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/eaa7cb836659ced2d9f814ac32aa3ec193803ed6", "tags": [ "x_transferred" ] }, { "url": "https://git.kernel.org/stable/c/2487007aa3b9fafbd2cb14068f49791ce1d7ede5", "tags": [ "x_transferred" ] }, { "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html", "tags": [ "x_transferred" ] } ] }, { "x_adpType": "supplier", "providerMetadata": { "orgId": "0b142b55-0307-4c5a-b3c9-f314f3fb7c5e", "shortName": "siemens-SADP", "dateUpdated": "2026-05-12T11:51:37.909Z" }, "affected": [ { "vendor": "Siemens", "product": "SIMATIC S7-1500 TM MFP - GNU/Linux subsystem", "versions": [ { "status": "affected", "version": "0", "lessThan": "*", "versionType": "custom" } ], "defaultStatus": "unknown" } ], "references": [ { "url": "https://cert-portal.siemens.com/productcert/html/ssa-265688.html" } ] } ] }, "dataVersion": "5.2" }