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And doing like that is almost a\nrevert of \"[PATCH] err1-40: sysvfs locking fix\" except that get_branch()\n from with find_shared() is called without write_lock(&pointers_lock)."}, {"lang": "es", "value": "En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: sysv: no llame a sb_bread() con pointers_lock retenido syzbot informa suspensi\u00f3n en contexto at\u00f3mico en el sistema de archivos SysV [1], porque sb_bread() se llama con rw_spinlock retenido. Un error \"write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock\" y un error \"sb_bread() with write_lock(&pointers_lock)\" fueron introducidos por \"Reemplazar BKL para bloqueo de cadena con sysvfs-private rwlock\" en Linux 2.5.12. Luego, \"[PATCH] err1-40: correcci\u00f3n de bloqueo de sysvfs\" en Linux 2.6.8 solucion\u00f3 el error anterior moviendo el bloqueo pointers_lock a las personas que llaman, pero en su lugar introdujo un error \"sb_bread() con read_lock(&pointers_lock)\" (que hizo que esto problema m\u00e1s f\u00e1cil de abordar). Al Viro sugiri\u00f3 que por qu\u00e9 no hacer lo que hace get_branch()/get_block()/find_shared() en el sistema de archivos Minix. Y hacer eso es casi una reversi\u00f3n de \"[PATCH] err1-40: correcci\u00f3n de bloqueo de sysvfs\", excepto que get_branch() de find_shared() se llama sin write_lock(&pointers_lock)."}], "id": "CVE-2023-52699", "lastModified": "2025-04-04T14:24:16.360", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 5.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2024-05-19T11:15:47.507", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-667"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: sysv: don't call sb_bread() with pointers_lock held", "id": "2281512", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2281512"}, "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-833", "details": ["In the Linux kernel, the following vulnerability has been resolved:\nsysv: don't call sb_bread() with pointers_lock held\nsyzbot is reporting sleep in atomic context in SysV filesystem [1], for\nsb_bread() is called with rw_spinlock held.\nA \"write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock\" bug\nand a \"sb_bread() with write_lock(&pointers_lock)\" bug were introduced by\n\"Replace BKL for chain locking with sysvfs-private rwlock\" in Linux 2.5.12.\nThen, \"[PATCH] err1-40: sysvfs locking fix\" in Linux 2.6.8 fixed the\nformer bug by moving pointers_lock lock to the callers, but instead\nintroduced a \"sb_bread() with read_lock(&pointers_lock)\" bug (which made\nthis problem easier to hit).\nAl Viro suggested that why not to do like get_branch()/get_block()/\nfind_shared() in Minix filesystem does. And doing like that is almost a\nrevert of \"[PATCH] err1-40: sysvfs locking fix\" except that get_branch()\nfrom with find_shared() is called without write_lock(&pointers_lock).", "A vulnerability was found in the Linux kernel's System V (sysv) filesystem and occurred when calling the `sb_bread()` function while holding the `pointers_lock` lock. This improper handling can lead to potential deadlocks or other erratic behavior in the filesystem."], "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-2023-52699", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "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": "2024-05-19T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-52699\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-52699\nhttps://lore.kernel.org/linux-cve-announce/2024051910-CVE-2023-52699-4099@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"}

{}