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

Deferred
AliasesUBUNTU-CVE-2025-68188DEBIAN-CVE-2025-68188
Published 16-12-2025Last modified 30-10-2026

Vulnerability summary

CVE-2025-68188 is a low (CVSS 2.0) vulnerability in linux. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 13.1% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 2, local access); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
2.0/10
010
Low · v4.0 (OSV · Ubuntu), selected by version preference
EPSS score
0.22%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 18 · Related 18
OPENSUSE-SU-2026:20287-1SUSE-SU-2026:0447-1SUSE-SU-2026:0472-1SUSE-SU-2026:0473-1SUSE-SU-2026:0587-1SUSE-SU-2026:20477-1

Timeline

  1. 16-12-2025
    PublishedVulnerability first disclosed.
  2. 30-10-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

1 score · 1 source · 1 version

EPSS trend

Probability

0.22%

Chance of exploitation in the next 30 days

Percentile

13%

Versus all other CVEs

30-day change

Increase +0.02 pp

From 0.20% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

No weakness data has been published for this record.

Affected systems

Version check

Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu156 products
  • linuxAll versions (No fix recorded) | < 6.17.0-14.14
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 6.17.0-1007.7
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Debian1 product
  • linuxAll versions (No fix recorded) | < 6.12.63-1 | < 6.17.8-1
Linux1 product
  • linux≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < d3fe882ed33a1e45921764f4615bf82db79d8dcd | ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < e61dfd906ad027a4ade1f89e5fe706a3fcd52527 | ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < bc2b881a0896c111c1041d8bb1f92a3b3873ace5 | ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < 06da08d9355bf8e2070459bbedbe372ccc02cc0e | ≥ cf1ef3f0719b4dcb74810ed507e2a2540f9811b4, < b62a59c18b692f892dcb8109c1c2e653b2abc95c | 4.12

3 vendors · 158 products

References

14 links
Show all 14 references