CVE-2026-43290 (GCVE-0-2026-43290)

Vulnerability from cvelistv5 – Published: 2026-05-08 13:11 – Updated: 2026-08-05 12:27
VLAI
Title
media: uvcvideo: Return queued buffers on start_streaming() failure
Summary
In the Linux kernel, the following vulnerability has been resolved: media: uvcvideo: Return queued buffers on start_streaming() failure Return buffers if streaming fails to start due to uvc_pm_get() error. This bug may be responsible for a warning I got running while :; do yavta -c3 /dev/video0; done on an xHCI controller which failed under this workload. I had no luck reproducing this warning again to confirm. xhci_hcd 0000:09:00.0: HC died; cleaning up usb 13-2: USB disconnect, device number 2 WARNING: CPU: 2 PID: 29386 at drivers/media/common/videobuf2/videobuf2-core.c:1803 vb2_start_streaming+0xac/0x120
Impacted products
Vendor Product Version
Linux Linux Affected: 7dd56c47784a466b03df62ca766207f483353cdc , < 69c32df23bed6001864779b965fa009bcd9a26de (git)
Affected: 7dd56c47784a466b03df62ca766207f483353cdc , < a5c01f15809d1d2c319d8bfb11d071df11ab731c (git)
Affected: 7dd56c47784a466b03df62ca766207f483353cdc , < 4cf3b6fd54ebb1ebc977bdc47fb6cfcf9a471a22 (git)
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Linux Linux Affected: 6.17
Unaffected: 0 , < 6.17 (semver)
Unaffected: 6.18.16 , ≤ 6.18.* (semver)
Unaffected: 6.19.6 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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Show details on NVD website

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              "value": "AV:L - The vulnerable path is reached through local V4L2 ioctls such as VIDIOC_REQBUFS, VIDIOC_QBUF, and VIDIOC_STREAMON on a UVC /dev/video node. Although the device is USB-backed, the triggering interface is a local device-file ioctl path.\nAC:L - There is no race or probabilistic timing requirement in the cleanup bug; once start_streaming fails, the stale queued-buffer state is deterministic. A controlled failing/disconnecting UVC device or repeated stream-start attempts can trigger the path.\nPR:L - The attacker needs permission to open and issue ioctls on the video device node, but no kernel capability or administrative privilege is checked in the UVC/V4L2 path. This is basic local device access.\nUI:N - A local attacker can perform the required ioctl sequence directly without requiring another user to take action. The vulnerable cleanup occurs in the attacker\u2019s own stream-start attempt.\nS:U - The vulnerability affects kernel media/USB buffer management within the same security authority. It does not inherently cross a VM, IOMMU, or other separate security boundary.\nC:H - The missed UVC buffer return can leave stale driver-private irqqueue entries after vb2 force-reclaims buffers, creating a plausible use-after-free/list-corruption condition. Under the scoring rule for memory corruption and uncertainty, confidentiality impact is High.\nI:H - The stale buffer/list state can lead to kernel memory corruption when the queue is later reused or cancelled. Under the required conservative scoring, this is treated as potentially exploitable for arbitrary modification/control-flow impact.\nA:H - The known manifestation is a kernel WARN in videobuf2, and the stale queue state can progress to list corruption, UAF, oops, or panic on affected systems. This supports High availability impact."
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}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

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