CVE-2021-47669 (GCVE-0-2021-47669)

Vulnerability from cvelistv5 – Published: 2025-04-17 18:01 – Updated: 2025-05-04 07:15
VLAI?
Title
can: vxcan: vxcan_xmit: fix use after free bug
Summary
In the Linux kernel, the following vulnerability has been resolved: can: vxcan: vxcan_xmit: fix use after free bug After calling netif_rx_ni(skb), dereferencing skb is unsafe. Especially, the canfd_frame cfd which aliases skb memory is accessed after the netif_rx_ni().
Severity ?
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < 6d6dcf2399cdd26f7f5426ca8dd8366b7f2ca105 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < 9b820875a32a3443d67bfd368e93038354e98052 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < a24476b37167816e6352ca1a2cf3769847774f70 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < e771a874076115df8bff27d325edfd2340e4ec69 (git)
Affected: a8f820a380a2a06fc4fe1a54159067958f800929 , < 75854cad5d80976f6ea0f0431f8cedd3bcc475cb (git)
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    Linux Linux Affected: 4.12
Unaffected: 0 , < 4.12 (semver)
Unaffected: 4.14.218 , ≤ 4.14.* (semver)
Unaffected: 4.19.171 , ≤ 4.19.* (semver)
Unaffected: 5.4.93 , ≤ 5.4.* (semver)
Unaffected: 5.10.11 , ≤ 5.10.* (semver)
Unaffected: 5.11 , ≤ * (original_commit_for_fix)
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Sightings

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  • 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.



Detection rules are retrieved from Rulezet.