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CVE-2026-98491: In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: conntrack: avoid modify

35
Routine
HIGH 7.8WATCHLIST

CVE-2026-98491 is a high-severity flaw (CVSS 7.8) affecting affected software. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: conntrack: avoid modifying shared unconfirmed ct entry In a case where skb with an unconfirmed ct entry gets cloned, we may end up committing both but with different sets of extensions. The series of events: 1. The first clone wants to commit and runs the helpers wiring up the extension pointer into the expectation list. 2. Then it looses the confirmat

Why this priority

  • High severity
  • On your watchlist

A fixed release or distro patch exists.

Risk facts

CVSS score7.8 (High)
Attack vectorLocal
Attack complexityLow
Privileges neededLow
User interactionNone
EPSS exploit chance0.2% (top 89%)
CISA exploited listNo
Published2026-10-18
Last modified2026-10-24
Publisher (CNA): kernel.org

Last updated 2026-10-24 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Timeline

Exact fixes by distribution

Fedora ELN · selinux-policy · FIXED · 45.23-1.eln159 · FEDORA-2026-3668c969a2 · source
sudo dnf upgrade --advisory=FEDORA-2026-3668c969a2
Fedora 46 · sugar-toolkit-gtk3 · FIXED · 0.122-2.fc46 · FEDORA-2026-d11eb2faf0 · source
sudo dnf upgrade --advisory=FEDORA-2026-d11eb2faf0
Ubuntu 20.04 · linux · NO FIX YET
Ubuntu 22.04 · linux · NO FIX YET
Ubuntu 24.04 · linux · NO FIX YET
Ubuntu 20.04 · linux-hwe-5.15 · NO FIX YET
Ubuntu 22.04 · linux-hwe-6.8 · NO FIX YET
Debian 12 · linux · FIXED · 6.1.190-1
sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "6.1.190-1" && echo PATCHED || echo STILL-VULNERABLE
Debian 13 · linux · FIXED · 6.12.113-1
sudo apt update && sudo apt install --only-upgrade linux dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux)" ge "6.12.113-1" && echo PATCHED || echo STILL-VULNERABLE
Debian 12 · linux-6.12 · FIXED · 6.12.113-1~deb12u1
sudo apt update && sudo apt install --only-upgrade linux-6.12 dpkg --compare-versions "$(dpkg-query -W -f='${Version}' linux-6.12)" ge "6.12.113-1~deb12u1" && echo PATCHED || echo STILL-VULNERABLE
RHEL 10 · kernel · DEFERRED
RHEL 6 · kernel · NOT AFFECTED
RHEL 7 · kernel · DEFERRED
RHEL 7 · kernel-rt · DEFERRED
RHEL 8 · kernel · DEFERRED
Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-98491?

No fixed release is listed yet. Watch the vendor advisory and apply any mitigation shown on this page.

Is CVE-2026-98491 being exploited?

CVE-2026-98491 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-98491 affect?

CVE-2026-98491 affects affected software. Severity is high (CVSS 7.8). In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: conntrack: avoid modifying shared unconfirmed ct entry In a case where skb with an unconfirmed ct entry gets cloned, we may end up committing both but w

How urgent is CVE-2026-98491?

Priority 35/100. High severity; On your watchlist

Software pages

Linux kernel vulnerabilities

References

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