CVE-2022-50274: media: dvbdev: adopts refcnt to avoid UAF

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

• linux linux kernelbefore 4.14.303
• linux linux kernel4.15 and later · before 4.19.270
• linux linux kernel4.20 and later · before 5.4.229
• linux linux kernel5.5 and later · before 5.10.163
• linux linux kernel5.11 and later · before 5.15.86
• linux linux kernel5.16 and later · before 6.0.16
• linux linux kernel6.1 and later · before 6.1.2

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

• Linux Linux

  • 2.6.12affected
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before ac521bbe3d00fa574e66a9361763f2b37725bc97affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 219b44bf94203bd433aa91b7796475bf656348e5affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 6d18b44bb44e1f4d97dfe0efe92ac0f0984739c2affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 2abd73433872194bccdf1432a0980e4ec5273c2aaffected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 88a6f8a72d167294c0931c7874941bf37a41b6ddaffected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a2f0a08aa613176c9688c81d7b598a7779974991affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 9945d05d6693710574f354c5dbddc47f5101eb77affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0fc044b2b5e2d05a1fa1fb0d7f270367a7855d79affected · git
  • before 2.6.12not affected · semver

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

Other highest-scoring records for the same primary product.

• CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
  90Now
• CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe KEV
  89Now
• CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
  85Now

Published before and after this one in the same product

• ← EarlierCVE-2022-50272Sep 15, 2025 · media: dvb-usb: az6027: fix null-ptr-deref in az6027_i2c_xfer()
  22Monitor
• ← EarlierCVE-2022-50273Sep 15, 2025 · f2fs: fix to do sanity check on destination blkaddr during recovery
  22Monitor
• Later →CVE-2022-50275Sep 15, 2025 · drm/radeon: Add the missed acpi_put_table() to fix memory leak
  22Monitor

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

1free(dev->buf);2/* ... another thread is still running ... */3process(dev->buf);

1lock(&dev->lock);2free(dev->buf);3dev->buf = NULL;4unlock(&dev->lock);

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.