CVE-2022-49935: dma-buf/dma-resv: check if the new fence is really later

Affected versions

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

• linux linux kernel5.0 and later · before 5.19.8
• linux linux kernel6.0

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

  • 5.0affected
  • 27836b641c1bf693c96c627388497b4e0f57441b and later · before c4c798fe98adceb642050819cb57cbc8f5c27870affected · git
  • 27836b641c1bf693c96c627388497b4e0f57441b and later · before a3f7c10a269d5b77dd5822ade822643ced3057f0affected · git
  • before 5.0not affected · semver
  • 5.19.8 and later · up to and including 5.19.*not affected · semver
  • 6.0 and laternot affected · original_commit_for_fix

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-2025-38082Jun 18, 2025 · gpio: virtuser: fix potential out-of-bound write
  31Monitor
• ← EarlierCVE-2022-49934Jun 18, 2025 · wifi: mac80211: Fix UAF in ieee80211_scan_rx()
  31Monitor
• Later →CVE-2022-49936Jun 18, 2025 · USB: core: Prevent nested device-reset calls
  22Monitor

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.