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CVE-2025-21669
MEDIUM5.5
Description
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.
CVE Details
CVSS v3.1 Score5.5
SeverityMEDIUM
CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Attack VectorLOCAL
ComplexityLOW
Privileges RequiredLOW
User InteractionNONE
Published1/31/2025
Last Modified11/3/2025
Sourcenvd
Honeypot Sightings0
Affected Products
linux:linux_kernel
Weaknesses (CWE)
CWE-476CWE-476
References
https://git.kernel.org/stable/c/18a7fc371d1dbf8deff16c2dd9292bcc73f43040(416baaa9-dc9f-4396-8d5f-8c081fb06d67)
https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1(416baaa9-dc9f-4396-8d5f-8c081fb06d67)
https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d(416baaa9-dc9f-4396-8d5f-8c081fb06d67)
https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61(416baaa9-dc9f-4396-8d5f-8c081fb06d67)
https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee(416baaa9-dc9f-4396-8d5f-8c081fb06d67)
https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de(416baaa9-dc9f-4396-8d5f-8c081fb06d67)
https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html(af854a3a-2127-422b-91ae-364da2661108)
https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html(af854a3a-2127-422b-91ae-364da2661108)
IOC Correlations
No correlations recorded
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