{"id":"CVE-2024-26875","summary":"media: pvrusb2: fix uaf in pvr2_context_set_notify","details":"In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: pvrusb2: fix uaf in pvr2_context_set_notify\n\n[Syzbot reported]\nBUG: KASAN: slab-use-after-free in pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35\nRead of size 4 at addr ffff888113aeb0d8 by task kworker/1:1/26\n\nCPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.8.0-rc1-syzkaller-00046-gf1a27f081c1f #0\nHardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024\nWorkqueue: usb_hub_wq hub_event\nCall Trace:\n \u003cTASK\u003e\n __dump_stack lib/dump_stack.c:88 [inline]\n dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106\n print_address_description mm/kasan/report.c:377 [inline]\n print_report+0xc4/0x620 mm/kasan/report.c:488\n kasan_report+0xda/0x110 mm/kasan/report.c:601\n pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35\n pvr2_context_notify drivers/media/usb/pvrusb2/pvrusb2-context.c:95 [inline]\n pvr2_context_disconnect+0x94/0xb0 drivers/media/usb/pvrusb2/pvrusb2-context.c:272\n\nFreed by task 906:\nkasan_save_stack+0x33/0x50 mm/kasan/common.c:47\nkasan_save_track+0x14/0x30 mm/kasan/common.c:68\nkasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640\npoison_slab_object mm/kasan/common.c:241 [inline]\n__kasan_slab_free+0x106/0x1b0 mm/kasan/common.c:257\nkasan_slab_free include/linux/kasan.h:184 [inline]\nslab_free_hook mm/slub.c:2121 [inline]\nslab_free mm/slub.c:4299 [inline]\nkfree+0x105/0x340 mm/slub.c:4409\npvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:137 [inline]\npvr2_context_thread_func+0x69d/0x960 drivers/media/usb/pvrusb2/pvrusb2-context.c:158\n\n[Analyze]\nTask A set disconnect_flag = !0, which resulted in Task B's condition being met\nand releasing mp, leading to this issue.\n\n[Fix]\nPlace the disconnect_flag assignment operation after all code in pvr2_context_disconnect()\nto avoid this issue.","modified":"2026-04-02T10:06:16.230608Z","published":"2024-04-17T10:27:33.914Z","related":["SUSE-SU-2024:1644-1","SUSE-SU-2024:1659-1","SUSE-SU-2024:1663-1","SUSE-SU-2025:02334-1"],"database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26875.json","cna_assigner":"Linux"},"references":[{"type":"WEB","url":"https://git.kernel.org/stable/c/0a0b79ea55de8514e1750884e5fec77f9fdd01ee"},{"type":"WEB","url":"https://git.kernel.org/stable/c/3a1ec89708d2e57e2712f46241282961b1a7a475"},{"type":"WEB","url":"https://git.kernel.org/stable/c/40cd818fae875c424a8335009db33c7b5a07de3a"},{"type":"WEB","url":"https://git.kernel.org/stable/c/8e60b99f6b7ccb3badeb512f5eb613ad45904592"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ab896d93fd6a2cd1afeb034c3cc9226cb499209f"},{"type":"WEB","url":"https://git.kernel.org/stable/c/d29ed08964cec8b9729bc55c7bb23f679d7a18fb"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eaa410e05bdf562c90b23cdf2d9327f9c4625e16"},{"type":"WEB","url":"https://git.kernel.org/stable/c/eb6e9dce979c08210ff7249e5e0eceb8991bfcd7"},{"type":"WEB","url":"https://git.kernel.org/stable/c/ed8000e1e8e9684ab6c30cf2b526c0cea039929c"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2024/26xxx/CVE-2024-26875.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2024-26875"},{"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":"e5be15c63804e05b5a94197524023702a259e308"},{"fixed":"ed8000e1e8e9684ab6c30cf2b526c0cea039929c"},{"fixed":"d29ed08964cec8b9729bc55c7bb23f679d7a18fb"},{"fixed":"ab896d93fd6a2cd1afeb034c3cc9226cb499209f"},{"fixed":"eb6e9dce979c08210ff7249e5e0eceb8991bfcd7"},{"fixed":"3a1ec89708d2e57e2712f46241282961b1a7a475"},{"fixed":"8e60b99f6b7ccb3badeb512f5eb613ad45904592"},{"fixed":"40cd818fae875c424a8335009db33c7b5a07de3a"},{"fixed":"eaa410e05bdf562c90b23cdf2d9327f9c4625e16"},{"fixed":"0a0b79ea55de8514e1750884e5fec77f9fdd01ee"}]}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2024-26875.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H"}]}