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CVE-2026-31473— media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于MEDIA_REQUEST_IOC_REINIT和VIDIOC_REQBUFS并发执行，可能导致释放后重用。

CVSS 7.8 · High EPSS 0.17% · P6

Possible ATT&CK Techniques 1 AI

T1206

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 6093d3002eabd7c2913d97f1d1f4ce34b072acf9< 331242998a7ade5c2f65e14988901614629f3db5 affected
6093d3002eabd7c2913d97f1d1f4ce34b072acf9< 2c685e99efb3b3bd2b78699fba6b1cf321975db0 affected
6093d3002eabd7c2913d97f1d1f4ce34b072acf9< 585fd9a2063dacce8b2820f675ef23d5d17434c5 affected
6093d3002eabd7c2913d97f1d1f4ce34b072acf9< 1a0d9083c24fbd5d22f7100f09d11e4d696a5f01 affected
6093d3002eabd7c2913d97f1d1f4ce34b072acf9< d8549a453d5bdc0a71de66ad47a1106703406a56 affected
6093d3002eabd7c2913d97f1d1f4ce34b072acf9< 72b9e81e0203f03c40f3adb457f55bd4c8eb112d affected
6093d3002eabd7c2913d97f1d1f4ce34b072acf9< cf2023e84f0888f96f4b65dc0804e7f3651969c1 affected
6093d3002eabd7c2913d97f1d1f4ce34b072acf9< bef4f4a88b73e4cc550d25f665b8a9952af22773 affected
… +10 more rows
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I. Basic Information for CVE-2026-31473

Vulnerability Information
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Vulnerability Title
media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: media: mc, v4l2: serialize REINIT and REQBUFS with req_queue_mutex MEDIA_REQUEST_IOC_REINIT can run concurrently with VIDIOC_REQBUFS(0) queue teardown paths. This can race request object cleanup against vb2 queue cancellation and lead to use-after-free reports. We already serialize request queueing against STREAMON/OFF with req_queue_mutex. Extend that serialization to REQBUFS, and also take the same mutex in media_request_ioctl_reinit() so REINIT is in the same exclusion domain. This keeps request cleanup and queue cancellation from running in parallel for request-capable devices.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于MEDIA_REQUEST_IOC_REINIT和VIDIOC_REQBUFS并发执行，可能导致释放后重用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 6093d3002eabd7c2913d97f1d1f4ce34b072acf9 ~ 331242998a7ade5c2f65e14988901614629f3db5 -
Linux Linux 4.20 -

II. Public POCs for CVE-2026-31473

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III. Intelligence Information for CVE-2026-31473

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Same Patch Batch · Linux · 2026-04-22 · 100 CVEs total

CVE-2026-31501 9.8 CRITICAL net: ti: icssg-prueth: fix use-after-free of CPPI descriptor in RX path
CVE-2026-31444 9.8 CRITICAL ksmbd: fix use-after-free and NULL deref in smb_grant_oplock()
CVE-2026-31436 9.8 CRITICAL dmaengine: idxd: fix possible wrong descriptor completion in llist_abort_desc()
CVE-2026-31463 9.8 CRITICAL iomap: fix invalid folio access when i_blkbits differs from I/O granularity
CVE-2026-31478 9.8 CRITICAL ksmbd: replace hardcoded hdr2_len with offsetof() in smb2_calc_max_out_buf_len()
CVE-2026-31448 9.4 CRITICAL ext4: avoid infinite loops caused by residual data
CVE-2026-31432 8.8 HIGH ksmbd: fix OOB write in QUERY_INFO for compound requests
CVE-2026-31433 8.8 HIGH ksmbd: fix potencial OOB in get_file_all_info() for compound requests
CVE-2026-31450 8.8 HIGH ext4: publish jinode after initialization
CVE-2026-31435 8.8 HIGH netfs: Fix read abandonment during retry
CVE-2026-31476 8.2 HIGH ksmbd: do not expire session on binding failure
CVE-2026-31464 8.1 HIGH scsi: ibmvfc: Fix OOB access in ibmvfc_discover_targets_done()
CVE-2026-31513 8.1 HIGH Bluetooth: L2CAP: Fix stack-out-of-bounds read in l2cap_ecred_conn_req
CVE-2026-31469 7.8 HIGH virtio_net: Fix UAF on dst_ops when IFF_XMIT_DST_RELEASE is cleared and napi_tx is false
CVE-2026-31453 7.8 HIGH xfs: avoid dereferencing log items after push callbacks
CVE-2026-31471 7.8 HIGH xfrm: iptfs: only publish mode_data after clone setup
CVE-2026-31449 7.8 HIGH ext4: validate p_idx bounds in ext4_ext_correct_indexes
CVE-2026-31454 7.8 HIGH xfs: save ailp before dropping the AIL lock in push callbacks
CVE-2026-31502 7.8 HIGH team: fix header_ops type confusion with non-Ethernet ports
CVE-2026-31468 7.8 HIGH vfio/pci: Fix double free in dma-buf feature

Showing top 20 of 100 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2026-31473

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