SB20260626212 - Allocation of Resources Without Limits or Throttling in Linux kernel vmw_vsock

Description

This security bulletin contains information about 1 vulnerability.

1) Allocation of Resources Without Limits or Throttling (CVE-ID: CVE-2026-53132)

CWE-ID: CWE-770 - Allocation of Resources Without Limits or Throttling

CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear

The vulnerability allows a local user to cause a denial of service.

The vulnerability exists due to improper resource management in virtio_transport_inc_rx_pkt() and the virtio vsock receive queue when processing crafted packets with zero-length payloads and the VIRTIO_VSOCK_SEQ_EOM flag. A local user can send a large number of specially crafted packets to cause a denial of service.

The issue occurs because queued packets may not increase the tracked byte count, allowing the receive queue to grow excessively.

Remediation

Install update from vendor's website.

References

• https://git.kernel.org/stable/c/059b7dbd20a6f0c539a45ddff1573cb8946685b5
• https://git.kernel.org/stable/c/100d5b2ffdc6468b9e48532641f29e83efdcb63c
• https://git.kernel.org/stable/c/1eca304f97a34ed5e921e1f0e06c8b241f25bf12
• https://git.kernel.org/stable/c/9bdc637fde66b63d6cad0caacd034888bb7bf5f5