{"id":"CVE-2022-49419","summary":"video: fbdev: vesafb: Fix a use-after-free due early fb_info cleanup","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nvideo: fbdev: vesafb: Fix a use-after-free due early fb_info cleanup\n\nCommit b3c9a924aab6 (\"fbdev: vesafb: Cleanup fb_info in .fb_destroy rather\nthan .remove\") fixed a use-after-free error due the vesafb driver freeing\nthe fb_info in the .remove handler instead of doing it in .fb_destroy.\n\nThis can happen if the .fb_destroy callback is executed after the .remove\ncallback, since the former tries to access a pointer freed by the latter.\n\nBut that change didn't take into account that another possible scenario is\nthat .fb_destroy is called before the .remove callback. For example, if no\nprocess has the fbdev chardev opened by the time the driver is removed.\n\nIf that's the case, fb_info will be freed when unregister_framebuffer() is\ncalled, making the fb_info pointer accessed in vesafb_remove() after that\nto no longer be valid.\n\nTo prevent that, move the expression containing the info-\u003epar to happen\nbefore the unregister_framebuffer() function call.","modified":"2026-04-02T08:27:34.136937Z","published":"2025-02-26T02:12:43.849Z","related":["SUSE-SU-2025:1176-1","SUSE-SU-2025:1241-1"],"database_specific":{"cna_assigner":"Linux","osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49419.json"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0fac5f8fb1bc2fc4f8714bf5e743c9cc3f547c63"},{"type":"WEB","url":"https://git.kernel.org/stable/c/acde4003efc16480375543638484d8f13f2e99a3"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d260cad015945d1f4bb9b028a096f648506106a2"},{"type":"WEB","url":"https://git.kernel.org/stable/c/f605f5558ecc175ec70016a3c15f007cb6386531"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2022/49xxx/CVE-2022-49419.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2022-49419"},{"type":"PACKAGE","url":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"f94aa46efaa087ec075c83e4508f943fb5e43977"},{"fixed":"0fac5f8fb1bc2fc4f8714bf5e743c9cc3f547c63"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"a1aac13288de2935dc1a9330a93b1ac92f1e2b72"},{"fixed":"f605f5558ecc175ec70016a3c15f007cb6386531"}]},{"type":"GIT","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","events":[{"introduced":"b3c9a924aab61adbc29df110006aa03afe1a78ba"},{"fixed":"d260cad015945d1f4bb9b028a096f648506106a2"},{"fixed":"acde4003efc16480375543638484d8f13f2e99a3"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2022-49419.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}