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THREATINT
PUBLISHED

CVE-2025-21669

vsock/virtio: discard packets if the transport changes



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.

Reserved 2024-12-29 | Published 2025-01-31 | Updated 2025-02-02 | Assigner Linux

Product status

Default status
unaffected

c0cfa2d8a788fcf45df5bf4070ab2474c88d543a before 18a7fc371d1dbf8deff16c2dd9292bcc73f43040
affected

c0cfa2d8a788fcf45df5bf4070ab2474c88d543a before 6486915fa661584d70e8e7e4068c6c075c67dd6d
affected

c0cfa2d8a788fcf45df5bf4070ab2474c88d543a before 88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee
affected

c0cfa2d8a788fcf45df5bf4070ab2474c88d543a before d88b249e14bd0ee1e46bbe4f456e22e01b8c68de
affected

c0cfa2d8a788fcf45df5bf4070ab2474c88d543a before 677579b641af109613564460a4e3bdcb16850b61
affected

c0cfa2d8a788fcf45df5bf4070ab2474c88d543a before 2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1
affected

Default status
affected

5.5
affected

Any version before 5.5
unaffected

5.10.234
unaffected

5.15.177
unaffected

6.1.127
unaffected

6.6.74
unaffected

6.12.11
unaffected

6.13
unaffected

References

git.kernel.org/...c/18a7fc371d1dbf8deff16c2dd9292bcc73f43040

git.kernel.org/...c/6486915fa661584d70e8e7e4068c6c075c67dd6d

git.kernel.org/...c/88244163bc7e7b0ce9dd7bf4c8a563b41525c3ee

git.kernel.org/...c/d88b249e14bd0ee1e46bbe4f456e22e01b8c68de

git.kernel.org/...c/677579b641af109613564460a4e3bdcb16850b61

git.kernel.org/...c/2cb7c756f605ec02ffe562fb26828e4bcc5fdfc1

cve.org (CVE-2025-21669)

nvd.nist.gov (CVE-2025-21669)

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