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CVE-2021-47671 (GCVE-0-2021-47671)

Vulnerability from cvelistv5 – Published: 2025-04-17 18:01 – Updated: 2026-05-11 13:58
VLAI
Title
can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path
Summary
In the Linux kernel, the following vulnerability has been resolved: can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path In es58x_rx_err_msg(), if can->do_set_mode() fails, the function directly returns without calling netif_rx(skb). This means that the skb previously allocated by alloc_can_err_skb() is not freed. In other terms, this is a memory leak. This patch simply removes the return statement in the error branch and let the function continue. Issue was found with GCC -fanalyzer, please follow the link below for details.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2025-04-17 19:49 UTC
CWE
  • CWE-401 - Missing Release of Memory after Effective Lifetime
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 8537257874e949a59c834cecfd5a063e11b64b0b , < 4f389e1276a5389c92cef860c9fde8e1c802a871 (git)
Affected: 8537257874e949a59c834cecfd5a063e11b64b0b , < 7eb0881aec26099089f12ae850aebd93190b1dfe (git)
Affected: 8537257874e949a59c834cecfd5a063e11b64b0b , < d9447f768bc8c60623e4bb3ce65b8f4654d33a50 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.13
Unaffected: 0 , < 5.13 (semver)
Unaffected: 5.14.19 , ≤ 5.14.* (semver)
Unaffected: 5.15.3 , ≤ 5.15.* (semver)
Unaffected: 5.16 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website

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              "url": "https://git.kernel.org/stable/c/d9447f768bc8c60623e4bb3ce65b8f4654d33a50"
            }
          ],
          "title": "can: etas_es58x: es58x_rx_err_msg(): fix memory leak in error path",
          "x_generator": {
            "engine": "bippy-1.2.0"
          }
        }
      },
      "cveMetadata": {
        "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "assignerShortName": "Linux",
        "cveId": "CVE-2021-47671",
        "datePublished": "2025-04-17T18:01:31.459Z",
        "dateReserved": "2025-04-16T07:16:05.753Z",
        "dateUpdated": "2025-05-04T07:15:52.076Z",
        "state": "PUBLISHED"
      },
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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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

Author Source Type Date Other

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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • 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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Detection rules are retrieved from Rulezet.

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Related by attack behaviour

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.


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