CVE-2025-21669
vsock/virtio: discard packets if the transport changes
CVSS Score
5.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | linux |
| Product | linux |
| Ecosystems | |
| Industries | Technology |
| Published | Jan 31, 2025 |
| Last Updated | May 12, 2026 |
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Affected Versions
Linux / Linux
c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < 18a7fc371d1dbf8deff16c2dd9292bcc73f43040 c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < 6486915fa661584d70e8e7e4068c6c075c67dd6d c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < 88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < d88b249e14bd0ee1e46bbe4f456e22e01b8c68de c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < 677579b641af109613564460a4e3bdcb16850b61 c0cfa2d8a788fcf45df5bf4070ab2474c88d543a < 2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1
Linux / Linux
5.5
References
git.kernel.org: https://git.kernel.org/stable/c/18a7fc371d1dbf8deff16c2dd9292bcc73f43040 git.kernel.org: https://git.kernel.org/stable/c/6486915fa661584d70e8e7e4068c6c075c67dd6d git.kernel.org: https://git.kernel.org/stable/c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee git.kernel.org: https://git.kernel.org/stable/c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de git.kernel.org: https://git.kernel.org/stable/c/677579b641af109613564460a4e3bdcb16850b61 git.kernel.org: https://git.kernel.org/stable/c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1 lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/03/msg00001.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/03/msg00002.html cert-portal.siemens.com: https://cert-portal.siemens.com/productcert/html/ssa-265688.html