VulnerabilityPublished 16 Dec 2025Updated 30 Oct 2026

CVE-2025-68188: Linux kernel · tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()

Source GCVE Database

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Authoritative record:CVE-2025-68188· High

Not known to be exploited · fixed in e61dfd906ad027a4ade1f89e5fe706a3fcd52527 : patch Linux kernel soon.

Data as of 30 Oct 2026, 16:33 UTC

Severity

High

Rated by Threat Radar · No CVSS score from NVD or the CNA

Thin evidence

One scorer or none

Patch: Available – fixed in e61dfd906ad027a4ade1f89e5fe706a3fcd52527, d3fe882ed33a1e45921764f4615bf82db79d8dcd, bc2b881a0896c111c1041d8bb1f92a3b3873ace5 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 30 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

ghsa-3mc8-x7c9-wfw9

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < e61dfd906ad027a4ade1f89e5fe706a3fcd52527	Fixed in e61dfd906ad027a4ade1f89e5fe706a3fcd52527
LinuxLinux	Affected ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < d3fe882ed33a1e45921764f4615bf82db79d8dcd	Fixed in d3fe882ed33a1e45921764f4615bf82db79d8dcd
LinuxLinux	Affected ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < bc2b881a0896c111c1041d8bb1f92a3b3873ace5	Fixed in bc2b881a0896c111c1041d8bb1f92a3b3873ace5
LinuxLinux	Affected ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < b62a59c18b692f892dcb8109c1c2e653b2abc95c	Fixed in b62a59c18b692f892dcb8109c1c2e653b2abc95c
LinuxLinux	Affected ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < 06da08d9355bf8e2070459bbedbe372ccc02cc0e	Fixed in 06da08d9355bf8e2070459bbedbe372ccc02cc0e
LinuxLinux	Affected =4.12	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check() Use RCU to avoid a pair of atomic operations and a potential UAF on dst_dev()->flags.

References

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