What’s Vulnerable › Vulnerabilities

CVE-2026-68379: tcp: fix TIME_WAIT socket reference leak on PSP policy failure

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-10 · updated 2026-08-17

Description

In the Linux kernel, the following vulnerability has been resolved: tcp: fix TIME_WAIT socket reference leak on PSP policy failure Release the TIME_WAIT socket reference and jump to discard_it upon PSP policy failure in both IPv4 and IPv6 receive paths. This prevents a memory leak of tcp_tw_bucket structures.

Affected products

• Linux kernel: 6.18 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/2c1931a81122c3cdc4c89448fe0442c69e21c0d5
• https://git.kernel.org/stable/c/374742a961becbbfc7fbfd1382d978a05e492741
• https://git.kernel.org/stable/c/e666af5dcc905ba694745963174d232deb478c55

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