{"cve":"CVE-2021-47353","nvd":{"published":"2024-05-21T15:15:21.693","modified":"2026-06-17T04:17:16.323","status":"Analyzed","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","score":5.5},"cwes":["CWE-476"],"references":["https://git.kernel.org/stable/c/21bf1414580c36ffc8d8de043beb3508cf812238","https://git.kernel.org/stable/c/2f3d9ddd32a28803baa547e6274983b67d5e287c","https://git.kernel.org/stable/c/3638705ecd5ad2785e996f820121c0ad15ce64b5","https://git.kernel.org/stable/c/371566f63cbd0bb6fbb25b8fe9d5798268d35af9","https://git.kernel.org/stable/c/5150877e4d99f85057a458daac7cd7c01005d5c6"],"products":["linux:linux_kernel"],"source":"nvd","synced_at":"2026-10-19T21:50:30.954589733+00:00"},"epss":{"cve":"CVE-2021-47353","score":0.00309,"percentile":0.2379,"date":"2026-11-01"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}