fkie_cve-2023-52699
Vulnerability from fkie_nvd
Published
2024-05-19 11:15
Modified
2025-04-04 14:24
Severity ?
5.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Summary
In the Linux kernel, the following vulnerability has been resolved: sysv: don't call sb_bread() with pointers_lock held syzbot is reporting sleep in atomic context in SysV filesystem [1], for sb_bread() is called with rw_spinlock held. A "write_lock(&pointers_lock) => read_lock(&pointers_lock) deadlock" bug and a "sb_bread() with write_lock(&pointers_lock)" bug were introduced by "Replace BKL for chain locking with sysvfs-private rwlock" in Linux 2.5.12. Then, "[PATCH] err1-40: sysvfs locking fix" in Linux 2.6.8 fixed the former bug by moving pointers_lock lock to the callers, but instead introduced a "sb_bread() with read_lock(&pointers_lock)" bug (which made this problem easier to hit). Al Viro suggested that why not to do like get_branch()/get_block()/ find_shared() in Minix filesystem does. And doing like that is almost a revert of "[PATCH] err1-40: sysvfs locking fix" except that get_branch() from with find_shared() is called without write_lock(&pointers_lock).
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79fPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904acPatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31ePatch
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79fPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904acPatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3Patch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31ePatch
af854a3a-2127-422b-91ae-364da2661108https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927Patch
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlMailing List, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlMailing List, Third Party Advisory
Impacted products
Vendor Product Version
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
linux linux_kernel *
debian debian_linux 10.0


To clipboard 

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   cveTags: [],
   descriptions: [
      {
         lang: "en",
         value: "In the Linux kernel, the following vulnerability has been resolved:\n\nsysv: don't call sb_bread() with pointers_lock held\n\nsyzbot is reporting sleep in atomic context in SysV filesystem [1], for\nsb_bread() is called with rw_spinlock held.\n\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.\n\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).\n\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()\n from with find_shared() is called without write_lock(&pointers_lock).",
      },
      {
         lang: "es",
         value: "En el kernel de Linux, se resolvió la siguiente vulnerabilidad: sysv: no llame a sb_bread() con pointers_lock retenido syzbot informa suspensión en contexto atómico 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: corrección de bloqueo de sysvfs\" en Linux 2.6.8 solucionó 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 más fácil de abordar). Al Viro sugirió que por qué no hacer lo que hace get_branch()/get_block()/find_shared() en el sistema de archivos Minix. Y hacer eso es casi una reversión de \"[PATCH] err1-40: corrección 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",
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   published: "2024-05-19T11:15:47.507",
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   sourceIdentifier: "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
   vulnStatus: "Analyzed",
   weaknesses: [
      {
         description: [
            {
               lang: "en",
               value: "CWE-667",
            },
         ],
         source: "nvd@nist.gov",
         type: "Primary",
      },
   ],
}


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