tcp: use dst_dev_rcu() in tcp_fastopen_active_disable_ofo_check()
Priority LOW 22Published · Updated
Key facts
- Attack vector
- —
- Privileges required
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- User interaction
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- Attack complexity
- —
- Impact type
- —
- Confidentiality · integrity · availability
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- Fix status
- Partial Red Hat: 4 without a fix
No CVSS vector from any source. Fix status from CNA and Red Hat.
Summary
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.
Why it matters now
EPSS 0.00224 13th percentileScored 2026-11-07
Fix Partial Linux (Linux): 6.1.191, 6.6.160, 6.12.58 +2Red Hat: 4 without a fix
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
Remediation
- Fix · CNA Linux (Linux) Fixed in 6.1.191, 6.6.160, 6.12.58, 6.17.8, 6.18
Vendor assessments
Red Hat
Red Hat rating: Moderate. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 10 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 7 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 8 | Affected | No fix yet: Fix deferred |
| Red Hat Enterprise Linux 9 | Affected | No fix yet: Fix deferred |
Not affected: 1 product
- Red Hat Enterprise Linux 6
Timeline
- 2026-10-02 Threatist record created from CVE-2025-68188
- 2026-10-03 Alias added: GHSA-3mc8-x7c9-wfw9
- 2026-10-21 Fix available: Linux/[email protected], Linux/Linux@e61dfd906ad027a4ade1f89e5fe706a3fcd52527 · CNA
- 2026-10-21 1 new reference · CNA
- 2026-10-30 Fix available: Linux/[email protected], Linux/Linux@d3fe882ed33a1e45921764f4615bf82db79d8dcd · CNA
- 2026-10-30 1 new reference · CNA
References
Other 5
- https://git.kernel.org/stable/c/d3fe882ed33a1e45921764f4615bf82db79d8dcd
- https://git.kernel.org/stable/c/e61dfd906ad027a4ade1f89e5fe706a3fcd52527
- https://git.kernel.org/stable/c/bc2b881a0896c111c1041d8bb1f92a3b3873ace5
- https://git.kernel.org/stable/c/06da08d9355bf8e2070459bbedbe372ccc02cc0e
- https://git.kernel.org/stable/c/b62a59c18b692f892dcb8109c1c2e653b2abc95c
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Sources
- CVE-2025-68188 · CVE Program
- CVE-2025-68188 · NVD
- FIRST EPSS
- GHSA-3mc8-x7c9-wfw9 · GitHub Advisory Database · CC BY 4.0
- CVE-2025-68188 · Red Hat security data · CC BY 4.0
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