{"id":"CVE-2023-53457","title":"FS: JFS: Fix null-ptr-deref Read in txBegin","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nFS: JFS: Fix null-ptr-deref Read in txBegin\n\n Syzkaller reported an issue where txBegin may be called\n on a superblock in a read-only mounted filesystem which leads\n to…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a7225e9e09519deb7e0c42eb6070029cc456e84d","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1b4c144767736221cad92c132f72b3c6ed06a0ea","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e94d0d378d2754b26fc54b429582553f7b53e15","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd2db13fb72ff18c633a48229589d42ceb89d1f8","Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 47cfdc338d674d38f4b2f22b7612cc6a2763ba27","Linux 2.6.12"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-05T20:21:14.593104Z"},"published":"2025-10-01","updated":"2026-11-05","sourceUpdated":"2026-11-05T20:31:09.819Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2023-53457","references":[{"url":"https://git.kernel.org/stable/c/a7225e9e09519deb7e0c42eb6070029cc456e84d"},{"url":"https://git.kernel.org/stable/c/1b4c144767736221cad92c132f72b3c6ed06a0ea"},{"url":"https://git.kernel.org/stable/c/a7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2"},{"url":"https://git.kernel.org/stable/c/2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1"},{"url":"https://git.kernel.org/stable/c/3e94d0d378d2754b26fc54b429582553f7b53e15"},{"url":"https://git.kernel.org/stable/c/3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3"},{"url":"https://git.kernel.org/stable/c/fd2db13fb72ff18c633a48229589d42ceb89d1f8"},{"url":"https://git.kernel.org/stable/c/47cfdc338d674d38f4b2f22b7612cc6a2763ba27"}],"tags":["cve.org"],"epss":0.0016,"epssPercentile":0.05154,"ingestedAt":"2026-11-05T22:38:31.797Z","slug":"CVE-2023-53457","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nFS: JFS: Fix null-ptr-deref Read in txBegin\n\n Syzkaller reported an issue where txBegin may be called\n on a superblock in a read-only mounted filesystem which leads\n to NULL pointer deref. This could be solved by checking if\n the filesystem is read-only before calling txBegin, and returning\n with appropiate error code.\n\n## Affected\n\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a7225e9e09519deb7e0c42eb6070029cc456e84d`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 1b4c144767736221cad92c132f72b3c6ed06a0ea`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < a7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e94d0d378d2754b26fc54b429582553f7b53e15`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < fd2db13fb72ff18c633a48229589d42ceb89d1f8`\n- `Linux >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 < 47cfdc338d674d38f4b2f22b7612cc6a2763ba27`\n- `Linux 2.6.12`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}