CVE-2024-42258

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It is\nbecause x86_32 uses CONFIG_X86_32 instead of CONFIG_32BIT.\n\n!CONFIG_64BIT should cover all 32 bit machines.\n\n[1] https://lore.kernel.org/linux-mm/CAHbLzkr1LwH3pcTgM+aGQ31ip2bKqiqEQ8=FQB+t2c3dhNKNHA@mail.gmail.com/"}], "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 flawed placement logic is reached only through local process address-space operations \u2014 `mmap(2)` for anonymous mappings \u22652MB and `execve(2)`/`ld.so` library loads on ext4/xfs/btrfs/fuse \u2014 with no network-facing input processing involved. An attacker needs local execution on the 32-bit target (i386 desktop/server, or ARM32-LPAE embedded/IoT/automotive controller).\nAC:L - The behaviour is fully deterministic with no race or memory-layout precondition: on any x86_32/ARM32 kernel with THP enabled (the Debian/Ubuntu i386 PAE default and common on ARM LPAE), every mapping \u22652MB is unconditionally rounded to a 2MB boundary, yielding a fixed, precomputable address. The attacker simply issues a large mmap or reads the predictable base of a large library.\nPR:L - Any ordinary unprivileged local user can allocate \u22652MB mappings and observe the zero-entropy 2MB-aligned placement, and can equally derive the now-deterministic library base addresses of other, more privileged processes. No capability, namespace, or administrative access is required.\nUI:N - No victim action is needed \u2014 the kernel applies the alignment automatically to every qualifying mapping in every process on the system, including long-running root daemons that are already mapped. The attacker acts entirely on their own.\nS:U - The weakened randomization and the address-space exhaustion are both confined to the same operating-system security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - With `mmap_rnd_bits` at the 32-bit default of 8, PMD alignment consumes every randomization bit, so ASLR is completely \u2014 not partially \u2014 defeated for all large mappings, exposing the exact address-space layout of arbitrary processes including setuid binaries and network daemons. This total loss of a core memory-confidentiality protection makes the contents of victim memory reliably locatable and disclosable, as the reporter demonstrated in the regreSSHion (CVE-2024-6387) context on i386.\nI:N - The defect only influences where mappings are placed; the padding arithmetic retains its overflow guards and the returned address stays inside the reserved region, so no out-of-bounds write, use-after-free, or other data-modification primitive arises from the flaw itself.\nA:H - Forcing 2MB alignment on the 2\u20133GB 32-bit user address space leaves multi-megabyte holes between mappings, and the resulting fragmentation was reported in practice as mmap failures and premature OOM on openSUSE i586 and Android compat workloads. On a 32-bit embedded or industrial controller this causes the primary workload to fail allocations and be OOM-killed, denying service."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/huge_memory.c"], "versions": [{"version": "87632bc9ecff5ded93433bc0fca428019bdd1cfe", "lessThan": "89f2914dd4b47d2fad3deef0d700f9526d98d11f", "status": "affected", "versionType": "git"}, {"version": "6ea9aa8d97e6563676094cb35755884173269555", "lessThan": "a5c399fe433a115e9d3693169b5f357f3194af0a", "status": "affected", "versionType": "git"}, {"version": "4ef9ad19e17676b9ef071309bc62020e2373705d", "lessThan": "7e1f4efb8d6140b2ec79bf760c43e1fc186e8dfc", "status": "affected", "versionType": "git"}, {"version": "4ef9ad19e17676b9ef071309bc62020e2373705d", "lessThan": "d9592025000b3cf26c742f3505da7b83aedc26d5", "status": "affected", "versionType": "git"}, {"version": "7432376c913381c5f24d373a87ff629bbde94b47", "status": "affected", "versionType": "git"}, {"version": "6.1.81", "lessThan": "6.1.105", "status": "affected", "versionType": "semver"}, {"version": "6.7.6", "lessThan": "6.8", "status": "affected", "versionType": "semver"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["mm/huge_memory.c"], "versions": [{"version": "6.8", "status": "affected"}, {"version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.105", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.10.3", "lessThanOrEqual": "6.10.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11", "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": "6.1.81", "versionEndExcluding": "6.1.105"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.10.3"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.7.6"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/89f2914dd4b47d2fad3deef0d700f9526d98d11f"}, {"url": "https://git.kernel.org/stable/c/a5c399fe433a115e9d3693169b5f357f3194af0a"}, {"url": "https://git.kernel.org/stable/c/7e1f4efb8d6140b2ec79bf760c43e1fc186e8dfc"}, {"url": "https://git.kernel.org/stable/c/d9592025000b3cf26c742f3505da7b83aedc26d5"}], "title": "mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2024-42258", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2024-09-10T16:12:53.509414Z"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-09-12T17:33:33.852Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T22:02:53.962Z"}}]}}

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It is\nbecause x86_32 uses CONFIG_X86_32 instead of CONFIG_32BIT.\n\n!CONFIG_64BIT should cover all 32 bit machines.\n\n[1] https://lore.kernel.org/linux-mm/CAHbLzkr1LwH3pcTgM+aGQ31ip2bKqiqEQ8=FQB+t2c3dhNKNHA@mail.gmail.com/"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: mm: enorme_memoria: use! CONFIG_64BIT para relajar la alineaci\u00f3n de p\u00e1ginas enormes en m\u00e1quinas de 32 bits Yves-Alexis Perez inform\u00f3 el commit 4ef9ad19e176 (\"mm: memoria_enorme: no fuerce la alineaci\u00f3n de p\u00e1ginas enormes en 32 bit\") no funcion\u00f3 para x86_32 [1]. Es porque x86_32 usa CONFIG_X86_32 en lugar de CONFIG_32BIT. !CONFIG_64BIT deber\u00eda cubrir todas las m\u00e1quinas de 32 bits. [1] https://lore.kernel.org/linux-mm/CAHbLzkr1LwH3pcTgM+aGQ31ip2bKqiqEQ8=FQB+t2c3dhNKNHA@mail.gmail.com/"}], "id": "CVE-2024-42258", "lastModified": "2026-08-04T11:19:42.900", "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": "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-2024-42258", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:12:53.509414Z", "version": "2.0.3"}}]}, "published": "2024-08-12T15:15:20.983", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7e1f4efb8d6140b2ec79bf760c43e1fc186e8dfc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/89f2914dd4b47d2fad3deef0d700f9526d98d11f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a5c399fe433a115e9d3693169b5f357f3194af0a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/d9592025000b3cf26c742f3505da7b83aedc26d5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2025/01/msg00001.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-770"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2024:9315", "cpe": "cpe:/a:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}, {"advisory": "RHSA-2024:9315", "cpe": "cpe:/o:redhat:enterprise_linux:9", "package": "kernel-0:5.14.0-503.11.1.el9_5", "product_name": "Red Hat Enterprise Linux 9", "release_date": "2024-11-12T00:00:00Z"}], "bugzilla": {"description": "kernel: mm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines", "id": "2304187", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2304187"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.5", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "details": ["In the Linux kernel, the following vulnerability has been resolved:\nmm: huge_memory: use !CONFIG_64BIT to relax huge page alignment on 32 bit machines\nYves-Alexis Perez reported commit 4ef9ad19e176 (\"mm: huge_memory: don't\nforce huge page alignment on 32 bit\") didn't work for x86_32 [1]. It is\nbecause x86_32 uses CONFIG_X86_32 instead of CONFIG_32BIT.\n!CONFIG_64BIT should cover all 32 bit machines.\n[1] https://lore.kernel.org/linux-mm/CAHbLzkr1LwH3pcTgM+aGQ31ip2bKqiqEQ8=FQB+t2c3dhNKNHA@mail.gmail.com/"], "name": "CVE-2024-42258", "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": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2024-08-12T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-42258\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-42258\nhttps://lore.kernel.org/linux-cve-announce/2024081216-CVE-2024-42258-e3f3@gregkh/T"], "threat_severity": "Low"}

{}