--- id: CVE-2024-26875 title: >- In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix uaf in pvr2_context_set_notify [Syzbot reported] BUG: KASAN: slab-use-after-free in pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/p… summary: >- In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix uaf in pvr2_context_set_notify [Syzbot reported] BUG: KASAN: slab-use-after-free in pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/p… severity: medium cvss: 6.4 cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H' cwe: - CWE-416 vendor: linux product: linux_kernel affected: - 'linux_kernel >= 2.6.26, < 4.19.311' - 'linux_kernel >= 4.20, < 5.4.273' - 'linux_kernel >= 5.5, < 5.10.214' - 'linux_kernel >= 5.11, < 5.15.153' - 'linux_kernel >= 5.16, < 6.1.83' - 'linux_kernel >= 6.2, < 6.6.23' - 'linux_kernel >= 6.7, < 6.7.11' - 'linux_kernel >= 6.8, < 6.8.2' patched: - linux_kernel 6.8.2 published: '2024-04-17' updated: '2026-10-15' sourceUpdated: '2026-10-15T01:17:27.323' source: NVD sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2024-26875' references: - url: 'https://git.kernel.org/stable/c/0a0b79ea55de8514e1750884e5fec77f9fdd01ee' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/3a1ec89708d2e57e2712f46241282961b1a7a475' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/40cd818fae875c424a8335009db33c7b5a07de3a' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/8e60b99f6b7ccb3badeb512f5eb613ad45904592' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/ab896d93fd6a2cd1afeb034c3cc9226cb499209f' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/d29ed08964cec8b9729bc55c7bb23f679d7a18fb' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/eaa410e05bdf562c90b23cdf2d9327f9c4625e16' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/eb6e9dce979c08210ff7249e5e0eceb8991bfcd7' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/ed8000e1e8e9684ab6c30cf2b526c0cea039929c' label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 - url: 'https://git.kernel.org/stable/c/0a0b79ea55de8514e1750884e5fec77f9fdd01ee' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/3a1ec89708d2e57e2712f46241282961b1a7a475' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/40cd818fae875c424a8335009db33c7b5a07de3a' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/8e60b99f6b7ccb3badeb512f5eb613ad45904592' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/ab896d93fd6a2cd1afeb034c3cc9226cb499209f' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/d29ed08964cec8b9729bc55c7bb23f679d7a18fb' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/eaa410e05bdf562c90b23cdf2d9327f9c4625e16' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/eb6e9dce979c08210ff7249e5e0eceb8991bfcd7' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://git.kernel.org/stable/c/ed8000e1e8e9684ab6c30cf2b526c0cea039929c' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://lists.debian.org/debian-lts-announce/2024/06/msg00020.html' label: af854a3a-2127-422b-91ae-364da2661108 - url: 'https://cert-portal.siemens.com/productcert/html/ssa-265688.html' label: 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e tags: - nvd - cve.org epss: 0.00247 epssPercentile: 0.15871 ingestedAt: '2026-10-15T03:30:12.654Z' ssvc: exploitation: none automatable: 'no' technicalImpact: total timestamp: '2024-08-08T18:16:38.134267Z' --- ## Overview In the Linux kernel, the following vulnerability has been resolved: media: pvrusb2: fix uaf in pvr2_context_set_notify [Syzbot reported] BUG: KASAN: slab-use-after-free in pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35 Read of size 4 at addr ffff888113aeb0d8 by task kworker/1:1/26 CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 6.8.0-rc1-syzkaller-00046-gf1a27f081c1f #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Workqueue: usb_hub_wq hub_event Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd9/0x1b0 lib/dump_stack.c:106 print_address_description mm/kasan/report.c:377 [inline] print_report+0xc4/0x620 mm/kasan/report.c:488 kasan_report+0xda/0x110 mm/kasan/report.c:601 pvr2_context_set_notify+0x2c4/0x310 drivers/media/usb/pvrusb2/pvrusb2-context.c:35 pvr2_context_notify drivers/media/usb/pvrusb2/pvrusb2-context.c:95 [inline] pvr2_context_disconnect+0x94/0xb0 drivers/media/usb/pvrusb2/pvrusb2-context.c:272 Freed by task 906: kasan_save_stack+0x33/0x50 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3f/0x60 mm/kasan/generic.c:640 poison_slab_object mm/kasan/common.c:241 [inline] __kasan_slab_free+0x106/0x1b0 mm/kasan/common.c:257 kasan_slab_free include/linux/kasan.h:184 [inline] slab_free_hook mm/slub.c:2121 [inline] slab_free mm/slub.c:4299 [inline] kfree+0x105/0x340 mm/slub.c:4409 pvr2_context_check drivers/media/usb/pvrusb2/pvrusb2-context.c:137 [inline] pvr2_context_thread_func+0x69d/0x960 drivers/media/usb/pvrusb2/pvrusb2-context.c:158 [Analyze] Task A set disconnect_flag = !0, which resulted in Task B's condition being met and releasing mp, leading to this issue. [Fix] Place the disconnect_flag assignment operation after all code in pvr2_context_disconnect() to avoid this issue. ## Affected - `linux_kernel >= 2.6.26, < 4.19.311` - `linux_kernel >= 4.20, < 5.4.273` - `linux_kernel >= 5.5, < 5.10.214` - `linux_kernel >= 5.11, < 5.15.153` - `linux_kernel >= 5.16, < 6.1.83` - `linux_kernel >= 6.2, < 6.6.23` - `linux_kernel >= 6.7, < 6.7.11` - `linux_kernel >= 6.8, < 6.8.2` ## Remediation Upgrade past the affected range: - `linux_kernel 6.8.2`