{"id":"CVE-2023-52699","state":"PUBLISHED","title":"sysv: don't call sb_bread() with pointers_lock held","description":"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).","publishedAt":"2024-05-19T10:10:30.381Z","updatedAt":"2026-10-15T00:17:09.274Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"13b33feb2ebddc2b1aa607f553566b18a4af1d76","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"674c1c4229e743070e09db63a23442950ff000d1","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"fd203d2c671bdee9ab77090ff394d3b71b627927","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"53cb1e52c9db618c08335984d1ca80db220ccf09","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"89e8524135a3902e7563a5a59b7b5ec1bf4904ac","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"a69224223746ab96d43e5db9d22d136827b7e2d3","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"f123dc86388cb669c3d6322702dc441abc35c31e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/sysv/itree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.12","versionType":"semver"},{"version":"4.19.312","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.274","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.215","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.155","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.86","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.27","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.8.6","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/sysv/itree.c"]}],"references":["https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76","https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f","https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1","https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927","https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09","https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac","https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3","https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e","https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html","https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html","https://cert-portal.siemens.com/productcert/html/ssa-398330.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52699.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52699","state":"PUBLISHED","datePublished":"2024-05-19T10:10:30.381Z","dateUpdated":"2026-10-15T00:17:09.274Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-07T14:49:46.890Z"},"containers":{"cna":{"title":"sysv: don't call sb_bread() with pointers_lock held","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)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"13b33feb2ebddc2b1aa607f553566b18a4af1d76","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"674c1c4229e743070e09db63a23442950ff000d1","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"fd203d2c671bdee9ab77090ff394d3b71b627927","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"53cb1e52c9db618c08335984d1ca80db220ccf09","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"89e8524135a3902e7563a5a59b7b5ec1bf4904ac","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"a69224223746ab96d43e5db9d22d136827b7e2d3","versionType":"git"},{"version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","status":"affected","lessThan":"f123dc86388cb669c3d6322702dc441abc35c31e","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/sysv/itree.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.12","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.12","versionType":"semver"},{"version":"4.19.312","status":"unaffected","lessThanOrEqual":"4.19.*","versionType":"semver"},{"version":"5.4.274","status":"unaffected","lessThanOrEqual":"5.4.*","versionType":"semver"},{"version":"5.10.215","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.155","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.86","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.27","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.8.6","status":"unaffected","lessThanOrEqual":"6.8.*","versionType":"semver"},{"version":"6.9","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["fs/sysv/itree.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/13b33feb2ebddc2b1aa607f553566b18a4af1d76"},{"url":"https://git.kernel.org/stable/c/1b4fe801b5bedec2b622ddb18e5c9bf26c63d79f"},{"url":"https://git.kernel.org/stable/c/674c1c4229e743070e09db63a23442950ff000d1"},{"url":"https://git.kernel.org/stable/c/fd203d2c671bdee9ab77090ff394d3b71b627927"},{"url":"https://git.kernel.org/stable/c/53cb1e52c9db618c08335984d1ca80db220ccf09"},{"url":"https://git.kernel.org/stable/c/89e8524135a3902e7563a5a59b7b5ec1bf4904ac"},{"url":"https://git.kernel.org/stable/c/a69224223746ab96d43e5db9d22d136827b7e2d3"},{"url":"https://git.kernel.org/stable/c/f123dc86388cb669c3d6322702dc441abc35c31e"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:31:56.467Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"4.19.312"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.4.274"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.10.215"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"5.15.155"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.1.86"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.6.27"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.8.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.12","versionEndExcluding":"6.9"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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