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Review reviewHigh

CVE-2025-40248

Linux Linux, RUGGEDCOM RST2428P

In the Linux kernel, the following vulnerability has been resolved: vsock: Ignore signal/timeout on connect() if already established During connect(), acting on a signal/timeout by disconnecting an already established socket leads to several issues: 1. connect() invoking vsock_transport_cancel_pkt() -> virtio_transport_purge_skbs() may race with sendmsg() invoking virtio_transport_get_credit(). This results in a permanently elevated `vvs->bytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling. 2. connect() resetting a connected socket's state may race with socket being placed in a...

CVSS
7.8
EPSS
0.15%
5.02% percentile
CISA KEV
Not listed
Published
2025.12.05
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.15%
Technical severityCVSS 7.8

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: vsock: Ignore signal/timeout on connect() if already established During connect(), acting on a signal/timeout by disconnecting an already established socket leads to several issues: 1. connect() invoking vsock_transport_cancel_pkt() -> virtio_transport_purge_skbs() may race with sendmsg() invoking virtio_transport_get_credit(). This results in a permanently elevated `vvs->bytes_unsent`. Which, in turn, confuses the SOCK_LINGER handling. 2. connect() resetting a connected socket's state may race with socket being placed in a...

Affected product and versions

Product
Linux Linux, RUGGEDCOM RST2428P
Affected versions
>= d021c344051af91f42c5ba9fdedc176740cbd238 < 3f71753935d648082a8279a97d30efe6b85be680, >= d021c344051af91f42c5ba9fdedc176740cbd238 < da664101fb4a0de5cb70d2bae6a650df954df2af, >= d021c344051af91f42c5ba9fdedc176740cbd238 < 67432915145848658149683101104e32f9fd6559, >= d021c344051af91f42c5ba9fdedc176740cbd238 < eeca93f06df89be5a36305b7b9dae1ed65550dfc, >= d021c344051af91f42c5ba9fdedc176740cbd238 < 5998da5a8208ae9ad7838ba322bccb2bdcd95e81, >= d021c344051af91f42c5ba9fdedc176740cbd238 < f1c170cae285e4b8f61be043bb17addc3d0a14b5, >= d021c344051af91f42c5ba9fdedc176740cbd238 < ab6b19f690d89ae4709fba73a3c4a7911f495b7a, >= d021c344051af91f42c5ba9fdedc176740cbd238 < 002541ef650b742a198e4be363881439bb9d86b4, >= 3.9, < V4.0
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, RUGGEDCOM RST2428P and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
Not available