CVE-2024-50123

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Fix it by adding the missing BPF_LINK_TYPE invocation for\nsockmap link\n\nAlso add comments for bpf_link_type to prevent missing updates in the\nfuture."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "baseScore": 7.1, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached through the bpf() syscall (BPF_MAP_CREATE/BPF_PROG_LOAD/BPF_LINK_CREATE, or BPF_OBJ_GET on a bpffs-pinned link) followed by a read of /proc/self/fdinfo/<fd>. There is no network-facing path to bpf_link_show_fdinfo().\nAC:L - Triggering is fully deterministic \u2014 link->type is unconditionally 14 for every sockmap link, so the out-of-bounds read at index 14 happens on every fdinfo read with no race, timing window, or memory-layout grooming required.\nPR:L - BPF token delegation (kernel 6.9+, present across the affected 6.10\u20136.11 range) routes the CAP_NET_ADMIN/CAP_BPF checks through ns_capable(token->userns, ...), letting an unprivileged user in a delegated user namespace create the sockmap link; separately, bpf_obj_get() enforces no capability check whatsoever, so any local user able to open a bpffs-pinned sockmap link obtains the fd and reads its own fdinfo.\nUI:N - The attacker performs every step \u2014 creating or opening the link and reading its fdinfo \u2014 within their own process. No victim action or interaction is required.\nS:U - The out-of-bounds read and the resulting disclosure or fault are confined to the kernel's own security authority, with no crossing of a VM, IOMMU, or sandbox boundary.\nC:H - The out-of-bounds qword is dereferenced as a string by seq_printf(\"%s\") with precision -1, so string_nocheck() walks unbounded from an uncontrolled kernel address until a NUL byte and copies those kernel memory bytes into fdinfo output that userspace reads back.\nI:N - The defect is a pure read of one element past a global array; no kernel memory is written out of bounds and no attacker-controlled data modifies kernel state.\nA:H - vsnprintf only guards NULL, sub-PAGE_SIZE, and IS_ERR values, so any other adjacent .data qword becomes a wild kernel dereference and oops, and KASAN globals instrumentation turns the access into a hard report (a panic with panic_on_warn)."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/bpf_types.h", "include/uapi/linux/bpf.h", "tools/include/uapi/linux/bpf.h"], "versions": [{"version": "699c23f02c65cbfc3e638f14ce0d70c23a2e1f02", "lessThan": "6d79f12c0ce2bc8ff5f109093df1734bd6450615", "status": "affected", "versionType": "git"}, {"version": "699c23f02c65cbfc3e638f14ce0d70c23a2e1f02", "lessThan": "c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["include/linux/bpf_types.h", "include/uapi/linux/bpf.h", "tools/include/uapi/linux/bpf.h"], "versions": [{"version": "6.10", "status": "affected"}, {"version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.6", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "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": "6.10", "versionEndExcluding": "6.11.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/6d79f12c0ce2bc8ff5f109093df1734bd6450615"}, {"url": "https://git.kernel.org/stable/c/c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5"}], "title": "bpf: Add the missing BPF_LINK_TYPE invocation for sockmap", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.1, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50123", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T20:21:36.865150Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-125", "description": "CWE-125 Out-of-bounds Read"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:16.209Z"}}]}}

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Fix it by adding the missing BPF_LINK_TYPE invocation for\nsockmap link\n\nAlso add comments for bpf_link_type to prevent missing updates in the\nfuture."}, {"lang": "es", "value": " En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: bpf: Agregue la invocaci\u00f3n BPF_LINK_TYPE faltante para sockmap Hay una lectura fuera de los l\u00edmites en bpf_link_show_fdinfo() para el fd del enlace sockmap. Arr\u00e9glelo agregando la invocaci\u00f3n BPF_LINK_TYPE faltante para el enlace sockmap Agregue tambi\u00e9n comentarios para bpf_link_type para evitar actualizaciones faltantes en el futuro."}], "id": "CVE-2024-50123", "lastModified": "2026-06-17T08:03:38.903", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.2, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-50123", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T20:21:36.865150Z", "version": "2.0.3"}}]}, "published": "2024-11-05T18:15:15.367", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/6d79f12c0ce2bc8ff5f109093df1734bd6450615"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c2f803052bc7a7feb2e03befccc8e49b6ff1f5f5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}], "source": "nvd@nist.gov", "type": "Primary"}, {"description": [{"lang": "en", "value": "CWE-125"}], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}

{"bugzilla": {"description": "kernel: bpf: Add the missing BPF_LINK_TYPE invocation for sockmap", "id": "2323922", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2323922"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.1", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H", "status": "draft"}, "cwe": "CWE-125", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Add the missing BPF_LINK_TYPE invocation for sockmap\nThere is an out-of-bounds read in bpf_link_show_fdinfo() for the sockmap\nlink fd. Fix it by adding the missing BPF_LINK_TYPE invocation for\nsockmap link\nAlso add comments for bpf_link_type to prevent missing updates in the\nfuture."], "name": "CVE-2024-50123", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-11-05T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-50123\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-50123\nhttps://lore.kernel.org/linux-cve-announce/2024110556-CVE-2024-50123-5370@gregkh/T"], "threat_severity": "Moderate"}

{}