{"id":"CVE-2021-47353","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nudf: Fix NULL pointer dereference in udf_symlink function\n\nIn function udf_symlink, epos.bh is assigned with the value returned\nby udf_tgetblk. The function udf_tgetblk is defined in udf/misc.c\nand returns the value of sb_getblk function that could be NULL.\nThen, epos.bh is used without any check, causing a possible\nNULL pointer dereference when sb_getblk fails.\n\nThis fix adds a check to validate the value of epos.bh.","modified":"2026-03-15T22:43:11.532683Z","published":"2024-05-21T15:15:21.693Z","related":["ALSA-2024:4211","ALSA-2024:4352","SUSE-SU-2024:1979-1","SUSE-SU-2024:1983-1","SUSE-SU-2024:2010-1","SUSE-SU-2024:2184-1","SUSE-SU-2024:2185-1"],"references":[{"type":"FIX","url":"https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5"},{"type":"FIX","url":"https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6"},{"type":"FIX","url":"https://git.kernel.org/stable/c/aebed6b19e51a34003d998da5ebb1dfdd2cb1d02"},{"type":"FIX","url":"https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238"},{"type":"FIX","url":"https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c"},{"type":"FIX","url":"https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9"},{"type":"FIX","url":"https://git.kernel.org/stable/c/80d505aee6398cf8beb72475c7edcf1733c1c68b"},{"type":"FIX","url":"https://git.kernel.org/stable/c/baea588a42d675e35daeaddd10fbc9700550bc4d"},{"type":"FIX","url":"https://git.kernel.org/stable/c/fa236c2b2d4436d9f19ee4e5d5924e90ffd7bb43"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47353.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"4.4.276"}]},{"events":[{"introduced":"4.5"},{"fixed":"4.9.276"}]},{"events":[{"introduced":"4.10"},{"fixed":"4.14.240"}]},{"events":[{"introduced":"4.15"},{"fixed":"4.19.198"}]},{"events":[{"introduced":"4.20"},{"fixed":"5.4.133"}]},{"events":[{"introduced":"5.5"},{"fixed":"5.10.51"}]},{"events":[{"introduced":"5.11"},{"fixed":"5.12.18"}]},{"events":[{"introduced":"5.13"},{"fixed":"5.13.3"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}