CVE-2022-49755: usb: gadget: f_fs: Prevent race during ffs_ep0_queue_wait

Affected versions

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

• linux linux kernel2.6.35 and later · before 4.14.305
• linux linux kernel4.15 and later · before 4.19.272
• linux linux kernel4.20 and later · before 5.4.231
• linux linux kernel5.5 and later · before 5.10.166
• linux linux kernel5.11 and later · before 5.15.91
• linux linux kernel5.16 and later · before 6.1.9
• linux linux kernel6.2

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

  • 2.6.35affected
  • ddf8abd2599491cbad959c700b90ba72a5dce8d0 and later · before facf353c9e8d7885b686d9a4b173d4e0af6441d2affected · git
  • ddf8abd2599491cbad959c700b90ba72a5dce8d0 and later · before e9036e951f93fb8d7b5e9d6e2c7f94a4da312ae4affected · git
  • ddf8abd2599491cbad959c700b90ba72a5dce8d0 and later · before a8d40942df074f4ebcb9bd3413596d92f323b064affected · git
  • ddf8abd2599491cbad959c700b90ba72a5dce8d0 and later · before 6dd9ea05534f323668db94fcc2726c7a84547e78affected · git
  • ddf8abd2599491cbad959c700b90ba72a5dce8d0 and later · before ae8e136bcaae96163b5821984de1036efc9abb1aaffected · git
  • ddf8abd2599491cbad959c700b90ba72a5dce8d0 and later · before 6aee197b7fbcd61596a78b47d553f2f99111f217affected · git
  • ddf8abd2599491cbad959c700b90ba72a5dce8d0 and later · before 6a19da111057f69214b97c62fb0ac59023970850affected · git
  • before 2.6.35not affected · semver
  • 4.14.305 and later · up to and including 4.14.*not 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-2022-49753Mar 27, 2025 · dmaengine: Fix double increment of client_count in dma_chan_get()
  31Monitor
• ← EarlierCVE-2022-49754Mar 27, 2025 · Bluetooth: Fix a buffer overflow in mgmt_mesh_add()
  31Monitor
• Later →CVE-2022-49756Mar 27, 2025 · phy: usb: sunplus: Fix potential null-ptr-deref in sp_usb_phy_probe()
  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.