Skip to main content
CVE-2026-80847VulnerabilityPublished Updated

Microsoft · tcp: clamp route advmss to TCP_MIN_MSS

Affects MicrosoftSource GCVE Database

0
Compare
Authoritative record:CVE-2026-80847· Medium

Not known to be exploited · fixed in eaf4af9bd6975c2eff8d48820937c83032d968dc : update Microsoft when convenient.

Data as of 7 Nov 2026, 12:19 UTC

Severity
Medium

Rated by Threat Radar · CVSS not yet scored by NVD

Thin evidence

One scorer or none
Patch
Available – fixed in eaf4af9bd6975c2eff8d48820937c83032d968dc, cfb44c6028e6f979720315e0772bbd0d4d33ed61, 870a9e42ecc6fe1b8c25d87af043cb0d9c178fe1 +4

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 4 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < eaf4af9bd6975c2eff8d48820937c83032d968dc
Fixed in
  • eaf4af9bd6975c2eff8d48820937c83032d968dc
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < cfb44c6028e6f979720315e0772bbd0d4d33ed61
Fixed in
  • cfb44c6028e6f979720315e0772bbd0d4d33ed61
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 870a9e42ecc6fe1b8c25d87af043cb0d9c178fe1
Fixed in
  • 870a9e42ecc6fe1b8c25d87af043cb0d9c178fe1
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 788fbbf7d61f9742298417c207c91b6db159fbbc
Fixed in
  • 788fbbf7d61f9742298417c207c91b6db159fbbc
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 31cf2349361902769dc323e4dbf4b449795ec288
Fixed in
  • 31cf2349361902769dc323e4dbf4b449795ec288
LinuxLinuxAffected
  • ≥ 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 6b8c20bf61924dfc38fefb145c9f7406d73fae53
Fixed in
  • 6b8c20bf61924dfc38fefb145c9f7406d73fae53

Description

To determine the support lifecycle for your software, see the Microsoft Support Lifecycle: https://support.microsoft.com/lifecycle

References

Community reviews

Loading reviews…