usb: gadget: uvc: fix list double add in uvcg_video_pump
Published Feb 26, 2025
7.8
HIGHCVSS 3.1
EPSS 0.25%
Description
A panic can occur if the endpoint becomes disabled and the uvcg_video_pump adds the request back to the req_free list after it has already been queued to the endpoint. The endpoint complete will add the request back to the req_free list. Invalidate the local request handle once it's been queued.
<6>[ 246.796704][T13726] configfs-gadget gadget: uvc: uvc_function_set_alt(1, 0) <3>[ 246.797078][ T26] list_add double add: new=ffffff878bee5c40, prev=ffffff878bee5c40, next=ffffff878b0f0a90. <6>[ 246.797213][ T26] ------------[ cut here ]------------ <2>[ 246.797224][ T26] kernel BUG at lib/list_debug.c:31! <6>[ 246.807073][ T26] Call trace: <6>[ 246.807180][ T26] uvcg_video_pump+0x364/0x38c <6>[ 246.807366][ T26] process_one_work+0x2a4/0x544 <6>[ 246.807394][ T26] worker_thread+0x350/0x784 <6>[ 246.807442][ T26] kthread+0x2ac/0x320
Affected products
-
- Version StatusaffectedConstraints
- Version StatusaffectedConstraints
- Version
-
- Version 5.16StatusaffectedConstraints-
- Version 0StatusunaffectedConstraints<5.16
- Version 5.18.8StatusunaffectedConstraints<=5.18.*
- Version 5.19StatusunaffectedConstraints<=*
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
- ≥ 5.16 · < 5.18.8
- 5.19
- 5.19
- 5.19
No data.
Red Hat Enterprise Linux 10
kernel
Not affected
Red Hat Enterprise Linux 6
kernel
Not affected
Red Hat Enterprise Linux 7
kernel
Not affected
Red Hat Enterprise Linux 7
kernel-rt
Not affected
Red Hat Enterprise Linux 8
kernel
Not affected
Red Hat Enterprise Linux 8
kernel-rt
Not affected
Red Hat Enterprise Linux 9
kernel
Not affected
Red Hat Enterprise Linux 9
kernel-rt
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 10 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 6 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 7 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 8 | kernel-rt | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel | Not affected | n/a |
| Red Hat Enterprise Linux 9 | kernel-rt | Not affected | n/a |
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 4, 2026.
Score over time
2025-2026- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (4 key points)
Flat stretches are collapsed. Showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 4, 2026 | 0.25% (0.00249) | 14.75th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.23% (0.00229) | 13.44th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.02% (0.00023) | 3.70th | v4 (v2025.03.14) |
| Feb 27, 2025 | 0.04% (0.00043) | 11.77th | v3 (v2023.03.01) |
References (7)
- https://access.redhat.com/security/cve/CVE-2022-49686 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2347750 Issue Tracking
- https://git.kernel.org/stable/c/96163f835e65f8c9897487fac965819f0651d671 Patch
- https://git.kernel.org/stable/c/d95ac8b920de1d39525fadc408ce675697626ca6 Patch
- https://lore.kernel.org/linux-cve-announce/2025022626-CVE-2022-49686-29d5@gregkh/T
- https://nvd.nist.gov/vuln/detail/CVE-2022-49686
- https://www.cve.org/CVERecord?id=CVE-2022-49686
Change history (0)
No recorded changes yet.