ALSA: pcm: Fix races among concurrent hw_params and hw_free calls

Affected versions

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

• linux linux kernelbefore 4.14.279
• linux linux kernel4.15 and later · before 4.19.243
• linux linux kernel4.20 and later · before 5.4.193
• linux linux kernel5.5 and later · before 5.10.109
• linux linux kernel5.11 and later · before 5.15.32
• linux linux kernel5.16 and later · before 5.16.18
• linux linux kernel5.17 and later · before 5.17.1

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 a42aa926843acca96c0dfbde2e835b8137f2f092affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 9cb6c40a6ebe4a0cfc9d6a181958211682cffea9affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before fbeb492694ce0441053de57699e1e2b7bc148a69affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0f6947f5f5208f6ebd4d76a82a4757e2839a23f8affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 33061d0fba51d2bf70a2ef9645f703c33fe8e438affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 0090c13cbbdffd7da079ac56f80373a9a1be0bf8affected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 1bbf82d9f961414d6c76a08f7f843ea068e0ab7baffected · git
  • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 92ee3c60ec9fe64404dc035e7c41277d74aa26cbaffected · 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-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
• CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV
  83Now

Published before and after this one in the same product

• ← EarlierCVE-2022-49289Feb 26, 2025 · uaccess: fix integer overflow on access_ok()
  28Monitor
• ← EarlierCVE-2022-49290Feb 26, 2025 · mac80211: fix potential double free on mesh join
  31Monitor
• Later →CVE-2022-49292Feb 26, 2025 · ALSA: oss: Fix PCM OSS buffer allocation overflow
  31Monitor

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

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.