CVE-2024-41034

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renamed, does not check\nconsistency enough, and may return location exceeding folio/page size for\nbroken directories.\n\nFix this issue by checking required directory entries (\".\" and \"..\") in\nthe first chunk of the directory in nilfs_dotdot()."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - The vulnerability is reached through local filesystem operations (a rename syscall) on a mounted nilfs2 volume built from an attacker-crafted image; there is no network-facing path into nilfs2 directory handling.\nAC:L - The attacker fully controls the on-disk directory inode (i_size = 0 with a garbage first entry and an arbitrary 16-bit rec_len), making the out-of-bounds \"..\\\" pointer and the resulting BUG_ON/OOB write deterministic with no race or memory-layout condition outside attacker control.\nPR:N - The attacker needs no privileges or account on the target \u2014 they only supply the malicious nilfs2 image (disk image or removable media); the rename that triggers the bug is an ordinary unprivileged operation on the mounted filesystem.\nUI:R - Because nilfs2 lacks FS_USERNS_MOUNT and requires a block device, the crafted image must be mounted by a privileged user or an automount daemon acting on inserted media before the rename can be performed.\nS:U - The corruption and crash occur within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - nilfs_set_link() dereferences an out-of-bounds nilfs_dir_entry up to ~64 KB past the folio, reading rec_len from adjacent kernel memory, and the resulting heap corruption/prepared-chunk mismatch can be leveraged to disclose kernel memory.\nI:H - When the OOB-read rec_len keeps the BUG_ON check satisfied, `de->inode` and `de->file_type` are written 8+1 bytes at an attacker-chosen offset beyond the folio, giving a controlled out-of-bounds write into adjacent kernel memory that is exploitable for further corruption.\nA:H - The reported and readily reproducible outcome is BUG_ON(to > folio_size(folio)) in __block_write_begin_int(), a kernel oops/panic taken with the folio locked inside an active nilfs transaction, wedging the filesystem or crashing the machine."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/nilfs2/dir.c"], "versions": [{"version": "2ba466d74ed74f073257f86e61519cb8f8f46184", "lessThan": "ff9767ba2cb949701e45e6e4287f8af82986b703", "status": "affected", "versionType": "git"}, {"version": "2ba466d74ed74f073257f86e61519cb8f8f46184", "lessThan": "24c1c8566a9b6be51f5347be2ea76e25fc82b11e", "status": "affected", "versionType": "git"}, {"version": "2ba466d74ed74f073257f86e61519cb8f8f46184", "lessThan": "a9a466a69b85059b341239766a10efdd3ee68a4b", "status": "affected", 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directory entries (\".\" and \"..\") in\nthe first chunk of the directory in nilfs_dotdot()."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: nilfs2: corrige el error del kernel en la operaci\u00f3n de cambio de nombre de un directorio roto Syzbot inform\u00f3 que en la operaci\u00f3n de cambio de nombre de directorio en un directorio roto en nilfs2, __block_write_begin_int() llamado para preparar la escritura en bloque puede fallar en la verificaci\u00f3n BUG_ON de acceso exceder el tama\u00f1o del folio/p\u00e1gina. Esto se debe a que nilfs_dotdot(), que obtiene la entrada de referencia del directorio principal (\"..\") del directorio que se va a mover o cambiar de nombre, no verifica la coherencia lo suficiente y puede devolver una ubicaci\u00f3n que exceda el tama\u00f1o de folio/p\u00e1gina para directorios rotos. Solucione este problema verificando las entradas de directorio requeridas (\".\" y \"..\") en el primer fragmento del directorio en nilfs_dotdot()."}], "id": "CVE-2024-41034", "lastModified": "2026-08-04T11:19:20.437", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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-2024-41034", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2024-09-10T16:23:37.441886Z", "version": "2.0.3"}}]}, "published": "2024-07-29T15:15:11.990", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1a8879c0771a68d70ee2e5e66eea34207e8c6231"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/24c1c8566a9b6be51f5347be2ea76e25fc82b11e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/298cd810d7fb687c90a14d8f9fd1b8719a7cb8a5"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/60f61514374e4a0c3b65b08c6024dd7e26150bfd"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7000b438dda9d0f41a956fc9bffed92d2eb6be0d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a9a466a69b85059b341239766a10efdd3ee68a4b"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a9e1ddc09ca55746079cc479aa3eb6411f0d99d4"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ff9767ba2cb949701e45e6e4287f8af82986b703"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1a8879c0771a68d70ee2e5e66eea34207e8c6231"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/24c1c8566a9b6be51f5347be2ea76e25fc82b11e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/298cd810d7fb687c90a14d8f9fd1b8719a7cb8a5"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/60f61514374e4a0c3b65b08c6024dd7e26150bfd"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/7000b438dda9d0f41a956fc9bffed92d2eb6be0d"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a9a466a69b85059b341239766a10efdd3ee68a4b"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a9e1ddc09ca55746079cc479aa3eb6411f0d99d4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/ff9767ba2cb949701e45e6e4287f8af82986b703"}, {"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": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: nilfs2: fix kernel bug on rename operation of broken directory", "id": "2300401", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2300401"}, "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": "draft"}, "cwe": "CWE-99", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nnilfs2: fix kernel bug on rename operation of broken directory\nSyzbot reported that in rename directory operation on broken directory on\nnilfs2, __block_write_begin_int() called to prepare block write may fail\nBUG_ON check for access exceeding the folio/page size.\nThis is because nilfs_dotdot(), which gets parent directory reference\nentry (\"..\") of the directory to be moved or renamed, does not check\nconsistency enough, and may return location exceeding folio/page size for\nbroken directories.\nFix this issue by checking required directory entries (\".\" and \"..\") in\nthe first chunk of the directory in nilfs_dotdot()."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2024-41034", "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": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "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": "2024-07-29T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2024-41034\nhttps://nvd.nist.gov/vuln/detail/CVE-2024-41034\nhttps://lore.kernel.org/linux-cve-announce/2024072922-CVE-2024-41034-7593@gregkh/T"], "statement": "Red Hat Enterprise Linux is not vulnerable to this CVE, as it does not affect the versions or configurations of the Linux kernel used in its distributions.", "threat_severity": "Moderate"}

{"created": "2025-07-13T11:22:07.730397+00:00", "updated": "2025-07-13T11:22:07.730454+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}