CVE-2024-26875media: pvrusb2: fix uaf in pvr2_context_set_notify
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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: <TASK> __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.
- CVSS
- 6.4 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-416
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from e5be15c63804e05b5a94197524023702a259e308 before ed8000e1e8e9684ab6c30cf2b526c0cea039929c; from e5be15c63804e05b5a94197524023702a259e308 before d29ed08964cec8b9729bc55c7bb23f679d7a18fb; from e5be15c63804e05b5a94197524023702a259e308 before ab896d93fd6a2cd1afeb034c3cc9226cb499209f; from e5be15c63804e05b5a94197524023702a259e308 before eb6e9dce979c08210ff7249e5e0eceb8991bfcd7; from e5be15c63804e05b5a94197524023702a259e308 before 3a1ec89708d2e57e2712f46241282961b1a7a475; from e5be15c63804e05b5a94197524023702a259e308 before 8e60b99f6b7ccb3badeb512f5eb613ad45904592; from e5be15c63804e05b5a94197524023702a259e308 before 40cd818fae875c424a8335009db33c7b5a07de3a; from e5be15c63804e05b5a94197524023702a259e308 before eaa410e05bdf562c90b23cdf2d9327f9c4625e16; and 1 more ranges | CNA record |
linux linux_kernel linux:linux_kernel | from e5be15c63804 before ed8000e1e8e9; from e5be15c63804 before d29ed08964ce; from e5be15c63804 before ab896d93fd6a; from e5be15c63804 before eb6e9dce979c; from e5be15c63804 before 3a1ec89708d2; from e5be15c63804 through 8e60b99f6b7c; from e5be15c63804 before 40cd818fae87; from e5be15c63804 before eaa410e05bdf; and 12 more ranges | CISA ADP |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1.1 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.26 before 4.19.311; from 4.20 before 5.4.273; from 5.5 before 5.10.214; from 5.11 before 5.15.153; from 5.16 before 6.1.83; from 6.2 before 6.6.23; from 6.7 before 6.7.11; from 6.8 before 6.8.2 | NVD |
References
- https://git.kernel.org/stable/c/ed8000e1e8e9684ab6c30cf2b526c0cea039929cpatch
- https://git.kernel.org/stable/c/d29ed08964cec8b9729bc55c7bb23f679d7a18fbpatch
- https://git.kernel.org/stable/c/ab896d93fd6a2cd1afeb034c3cc9226cb499209fpatch
- https://git.kernel.org/stable/c/eb6e9dce979c08210ff7249e5e0eceb8991bfcd7patch
- https://git.kernel.org/stable/c/3a1ec89708d2e57e2712f46241282961b1a7a475patch
- https://git.kernel.org/stable/c/8e60b99f6b7ccb3badeb512f5eb613ad45904592patch
- https://git.kernel.org/stable/c/40cd818fae875c424a8335009db33c7b5a07de3apatch
- https://git.kernel.org/stable/c/eaa410e05bdf562c90b23cdf2d9327f9c4625e16patch
- https://git.kernel.org/stable/c/0a0b79ea55de8514e1750884e5fec77f9fdd01eepatch
- https://lists.debian.org/debian-lts-announce/2024/06/msg00017.htmlmailing-list, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2024/06/msg00020.htmlmailing-list, third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-265688.html
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.