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CVE-2026-31502: In the Linux kernel, the following vulnerability has been resolved: team: fix header_ops type confusion with

33
Routine
HIGH 7.8WATCHLISTUPGRADE

CVE-2026-31502 is a high-severity flaw (CVSS 7.8) affecting linux kernel. 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: team: fix header_ops type confusion with non-Ethernet ports Similar to commit 950803f72547 ("bonding: fix type confusion in bond_setup_by_slave()") team has the same class of header_ops type confusion. For non-Ethernet ports, team_setup_by_port() copies port_dev->header_ops directly. When the team device later calls dev_hard_header() or dev_parse_header(), these callbacks can

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 chance0.1% (top 97%)
CISA exploited listNo
WeaknessCWE-843
Published2026-04-22
Last modified2026-10-19
Publisher (CNA): kernel.org · Vendor: linux

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Last updated 2026-10-19 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

linux linux kernel UPGRADE
Affected: >= 3.7.1 and < 6.12.80 · >= 6.13 and < 6.18.21 · >= 6.19 and < 6.19.11 · 3.7 · 7.0 rc1 · 7.0 rc2 · 7.0 rc3 · 7.0 rc4
Fixed in: 6.12.80, 6.18.21, 6.19.11
Safe to downgrade to: no unaffected older release
Check your OS release
cat /etc/os-release; uname -r
Debian / Ubuntu
sudo apt update && sudo apt full-upgrade
RHEL / Amazon Linux / Fedora
sudo dnf upgrade --refresh
Windows
Install the latest cumulative update from Windows Update
If no patch exists yet
OS downgrades are not safe. Apply the vendor mitigation from the advisory and restrict exposure.
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-2026-31502?

linux kernel: upgrade to 6.12.80, 6.18.21, 6.19.11. Exact commands for each OS are on this page.

Is CVE-2026-31502 being exploited?

CVE-2026-31502 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-2026-31502 affect?

CVE-2026-31502 affects linux kernel. Severity is high (CVSS 7.8). In the Linux kernel, the following vulnerability has been resolved: team: fix header_ops type confusion with non-Ethernet ports Similar to commit 950803f72547 ("bonding: fix type confusion in bond_setup_by_slave()") team has the same clas

How urgent is CVE-2026-31502?

Priority 33/100. High severity; On your watchlist

Software pages

Linux kernel vulnerabilities

Related CVEs

References

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