CVE-2025-21669 (GCVE-0-2025-21669)

Vulnerability from cvelistv5 – Published: 2025-01-31 11:25 – Updated: 2025-11-03 20:58
VLAI?
Title
vsock/virtio: discard packets if the transport changes
Summary
In the Linux kernel, the following vulnerability has been resolved: vsock/virtio: discard packets if the transport changes If the socket has been de-assigned or assigned to another transport, we must discard any packets received because they are not expected and would cause issues when we access vsk->transport. A possible scenario is described by Hyunwoo Kim in the attached link, where after a first connect() interrupted by a signal, and a second connect() failed, we can find `vsk->transport` at NULL, leading to a NULL pointer dereference.
Severity ?
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
CWE
  • CWE-476 - NULL Pointer Dereference
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 18a7fc371d1dbf8deff16c2dd9292bcc73f43040 (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 6486915fa661584d70e8e7e4068c6c075c67dd6d (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < d88b249e14bd0ee1e46bbe4f456e22e01b8c68de (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 677579b641af109613564460a4e3bdcb16850b61 (git)
Affected: c0cfa2d8a788fcf45df5bf4070ab2474c88d543a , < 2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1 (git)
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    Linux Linux Affected: 5.5
Unaffected: 0 , < 5.5 (semver)
Unaffected: 5.10.234 , ≤ 5.10.* (semver)
Unaffected: 5.15.177 , ≤ 5.15.* (semver)
Unaffected: 6.1.127 , ≤ 6.1.* (semver)
Unaffected: 6.6.74 , ≤ 6.6.* (semver)
Unaffected: 6.12.11 , ≤ 6.12.* (semver)
Unaffected: 6.13 , ≤ * (original_commit_for_fix)
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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.
  • 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.