CVE-2021-47305 (GCVE-0-2021-47305)

Vulnerability from cvelistv5 – Published: 2024-05-21 14:35 – Updated: 2026-05-11 13:51
VLAI
Title
dma-buf/sync_file: Don't leak fences on merge failure
Summary
In the Linux kernel, the following vulnerability has been resolved: dma-buf/sync_file: Don't leak fences on merge failure Each add_fence() call does a dma_fence_get() on the relevant fence. In the error path, we weren't calling dma_fence_put() so all those fences got leaked. Also, in the krealloc_array failure case, we weren't freeing the fences array. Instead, ensure that i and fences are always zero-initialized and dma_fence_put() all the fences and kfree(fences) on every error path.
Severity
No CVSS data available.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2024-06-17 17:37 UTC
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: a02b9dc90d844cc7df7b63264e7920cc425052d9 , < 19f51c2529339280d2c8c6427cd3e21ddf1ac3f8 (git)
Affected: a02b9dc90d844cc7df7b63264e7920cc425052d9 , < e0355a0ad31a1d677b2a4514206de4902bd550e8 (git)
Affected: a02b9dc90d844cc7df7b63264e7920cc425052d9 , < 41f45e91c92c8480242ea448d54e28c753b13902 (git)
Affected: a02b9dc90d844cc7df7b63264e7920cc425052d9 , < 0d514185ae792d3a1903c8e1a83899aa996705ce (git)
Affected: a02b9dc90d844cc7df7b63264e7920cc425052d9 , < 19edcd97727aae9362444a859a24d99a8730cb27 (git)
Affected: a02b9dc90d844cc7df7b63264e7920cc425052d9 , < ffe000217c5068c5da07ccb1c0f8cce7ad767435 (git)
guessed Create a notification for this product.
Linux Linux Affected: 4.9
Unaffected: 0 , < 4.9 (semver)
Unaffected: 4.14.241 , ≤ 4.14.* (semver)
Unaffected: 4.19.199 , ≤ 4.19.* (semver)
Unaffected: 5.4.135 , ≤ 5.4.* (semver)
Unaffected: 5.10.53 , ≤ 5.10.* (semver)
Unaffected: 5.13.5 , ≤ 5.13.* (semver)
Unaffected: 5.14 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.