CVE-2026-68379: tcp: fix TIME_WAIT socket reference leak on PSP policy failure
Greg Kroah-Hartman <[email protected]>
| Newsgroups | org.kernel.vger.linux-cve-announce |
|---|---|
| Message-ID | <2026081044-CVE-2026-68379-f21a@gregkh> |
From: Greg Kroah-Hartman <[email protected]> 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. The Linux kernel CVE team has assigned CVE-2026-68379 to this issue. Affected and fixed versions =========================== Issue introduced in 6.18 with commit 659a2899a57da59f433182eba571881884d6323e and fixed in 6.18.42 with commit e666af5dcc905ba694745963174d232deb478c55 Issue introduced in 6.18 with commit 659a2899a57da59f433182eba571881884d6323e and fixed in 7.1.6 with commit 374742a961becbbfc7fbfd1382d978a05e492741 Issue introduced in 6.18 with commit 659a2899a57da59f433182eba571881884d6323e and fixed in 7.2-rc4 with commit 2c1931a81122c3cdc4c89448fe0442c69e21c0d5 Please see https://www.kernel.org for a full list of currently supported kernel versions by the kernel community. Unaffected versions might change over time as fixes are backported to older supported kernel versions. The official CVE entry at https://cve.org/CVERecord/?id=CVE-2026-68379 will be updated if fixes are backported, please check that for the most up to date information about this issue. Affected files ============== The file(s) affected by this issue are: net/ipv4/tcp_ipv4.c net/ipv6/tcp_ipv6.c Mitigation ========== The Linux kernel CVE team recommends that you update to the latest stable kernel version for this, and many other bugfixes. Individual changes are never tested alone, but rather are part of a larger kernel release. Cherry-picking individual commits is not recommended or supported by the Linux kernel community at all. If however, updating to the latest release is impossible, the individual changes to resolve this issue can be found at these commits: https://git.kernel.org/stable/c/e666af5dcc905ba694745963174d232deb478c55 https://git.kernel.org/stable/c/374742a961becbbfc7fbfd1382d978a05e492741 https://git.kernel.org/stable/c/2c1931a81122c3cdc4c89448fe0442c69e21c0d5