SB20260824231 - Use-after-free in Linux kernel vmw_vsock
Published: August 24, 2026
Security Bulletin ID
SB20260824231
CSH Severity
Low
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Local access
Highest impact
Denial of service
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 vulnerability.
1) Use-after-free (CVE-ID: CVE-2026-74613)
CWE-ID: CWE-416 - Use After Free
CVSSv4: 6.8 [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]
The vulnerability allows a local user to cause a denial of service.
The vulnerability exists due to a use-after-free in virtio_transport_rx_work in net/vmw_vsock/virtio_transport.c when processing RX work during device teardown. A local user can trigger the vulnerable code path to cause a denial of service.
The issue can lead to a kernel panic during suspend or freeze operations when queued work continues after virtqueues have been deleted.
Remediation
Install update from vendor's website.
References
- https://git.kernel.org/stable/c/1aa21e7c8702a7c37cd7d3cace1a652cfa5e8171
- https://git.kernel.org/stable/c/38c7763fdc533edb34dc8f4489c260e8ba2ccae9
- https://git.kernel.org/stable/c/4d37e3525cc346a1421c1bdeaad5848e249fc60c
- https://git.kernel.org/stable/c/9d80a04129a6c27a690cb69de3fe3f50be5aa8b9
- https://git.kernel.org/stable/c/a309b74e3fc052352ab778500449cb9c3853c363
- https://git.kernel.org/stable/c/a31e0ad444698d8aa7534a0f89fda543730f97a5
- https://git.kernel.org/stable/c/a7658508f5fe8f1077a65e8cb9535d3426f37a2f
- https://git.kernel.org/stable/c/e82a5faea2e3886dfb2a65ce092a132e7e896915