CVE-2024-42067

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No VM, IOMMU, or sandbox boundary is crossed.\nC:H - A failed lock leaves a writable, executable kernel page containing attacker-influenced JIT output, which is a direct kernel code-injection primitive when paired with any write; injected code yields arbitrary kernel memory disclosure. The loss of the read-only guarantee on executable memory is a full compromise of confidentiality in the worst case.\nI:H - On arm32 the JIT buffer stays RWX with attacker-chosen immediates embedded in it \u2014 precisely the JIT-spray/control-flow-hijack scenario that `bpf_jit_binary_lock_ro()` exists to prevent, permitting arbitrary kernel code execution. Kernel executable memory silently remaining writable is an integrity failure of the highest order.\nA:H - On s390 and x86-32 the buffer is allocated NX and only becomes executable via `set_memory_rox()`; on failure the JIT still sets `bpf_func`/`jited = 1`, so the first run of the filter faults on an instruction fetch from a non-executable page and oopses the kernel. 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{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "Linux", "programFiles": ["arch/arm/net/bpf_jit_32.c", "arch/loongarch/net/bpf_jit.c", "arch/mips/net/bpf_jit_comp.c", "arch/parisc/net/bpf_jit_core.c", "arch/s390/net/bpf_jit_comp.c", "arch/sparc/net/bpf_jit_comp_64.c", "arch/x86/net/bpf_jit_comp32.c", "include/linux/filter.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"lessThan": "c20d0fa873039bce82d4b1b2ffcda8bb22242790", "status": "affected", "version": "d48567c9a0d1e605639f8a8705a61bbb55fb4e84", "versionType": "git"}, {"lessThan": "044da7ae7afd4ef60806d73654a2e6a79aa4ed7a", "status": "affected", "version": "d48567c9a0d1e605639f8a8705a61bbb55fb4e84", "versionType": "git"}, {"lessThan": "e60adf513275c3a38e5cb67f7fd12387e43a3ff5", "status": "affected", "version": "d48567c9a0d1e605639f8a8705a61bbb55fb4e84", "versionType": "git"}]}, {"defaultStatus": "affected", "product": "Linux", "programFiles": ["arch/arm/net/bpf_jit_32.c", "arch/loongarch/net/bpf_jit.c", "arch/mips/net/bpf_jit_comp.c", "arch/parisc/net/bpf_jit_core.c", "arch/s390/net/bpf_jit_comp.c", "arch/sparc/net/bpf_jit_comp_64.c", "arch/x86/net/bpf_jit_comp32.c", "include/linux/filter.h"], "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "vendor": "Linux", "versions": [{"status": "affected", "version": "6.2"}, {"lessThan": "6.2", "status": "unaffected", "version": "0", "versionType": "semver"}, {"lessThanOrEqual": "6.6.*", "status": "unaffected", "version": "6.6.160", "versionType": "semver"}, {"lessThanOrEqual": "6.9.*", "status": "unaffected", "version": "6.9.8", "versionType": "semver"}, {"lessThanOrEqual": "*", "status": "unaffected", "version": "6.10", "versionType": "original_commit_for_fix"}]}], "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "816250D9-9650-4A7D-A4A7-1D69242F2032", "versionEndExcluding": "6.6.37", "vulnerable": true}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "E95105F2-32E3-4C5F-9D18-7AEFD0E6275C", "versionEndExcluding": "6.9.8", "versionStartIncluding": "6.7", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()\n\nset_memory_rox() can fail, leaving memory unprotected.\n\nCheck return and bail out when bpf_jit_binary_lock_ro() returns\nan error."}, {"lang": "es", "value": " En el kernel de Linux se ha resuelto la siguiente vulnerabilidad: bpf: Tener en cuenta el retorno de set_memory_rox() con bpf_jit_binary_lock_ro() set_memory_rox() puede fallar, dejando la memoria desprotegida. Verifique la devoluci\u00f3n y el rescate cuando bpf_jit_binary_lock_ro() devuelva un error."}], "id": "CVE-2024-42067", "lastModified": "2026-10-21T13:17:45.390", "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"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-42067", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:19:56.137791Z", "version": "2.0.3"}}]}, "published": "2024-07-29T16:15:06.323", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/044da7ae7afd4ef60806d73654a2e6a79aa4ed7a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c20d0fa873039bce82d4b1b2ffcda8bb22242790"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e60adf513275c3a38e5cb67f7fd12387e43a3ff5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/044da7ae7afd4ef60806d73654a2e6a79aa4ed7a"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/08f6c05feb1db21653e98ca84ea04ca032d014c7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/9fef36cad60d4226f9d06953cd56d1d2f9119730"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/e60adf513275c3a38e5cb67f7fd12387e43a3ff5"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-252"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: bpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()", "id": "2300505", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300505"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H", "status": "draft"}, "cwe": "CWE-252", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nbpf: Take return from set_memory_rox() into account with bpf_jit_binary_lock_ro()\nset_memory_rox() can fail, leaving memory unprotected.\nCheck return and bail out when bpf_jit_binary_lock_ro() returns\nan error."], "name": "CVE-2024-42067", "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": "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": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42067\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42067\nhttps://lore.kernel.org/linux-cve-announce/2024072951-CVE-2024-42067-c8ef@gregkh/T"], "statement": "The default Red Hat Enterprise Linux kernel prevents unprivileged users from being able to use eBPF by the kernel.unprivileged_bpf_disabled sysctl. This would require a privileged user with CAP_SYS_ADMIN or root to be able to abuse this flaw reducing its attack space.\nFor the Red Hat Enterprise Linux 8 to confirm the current state, inspect the sysctl with the command:\n# cat /proc/sys/kernel/unprivileged_bpf_disabled\nThe setting of 1 would mean that unprivileged users can not use eBPF, mitigating the flaw.", "threat_severity": "Low"}

{}