PatchTheCVECVE-2026-43042: In the Linux kernel, the following vulnerability has been resolved: mpls: add seqcount to protect the platfor
CVE-2026-43042 is a high-severity flaw (CVSS 7.1) 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: mpls: add seqcount to protect the platform_label{,s} pair The RCU-protected codepaths (mpls_forward, mpls_dump_routes) can have an inconsistent view of platform_labels vs platform_label in case of a concurrent resize (resize_platform_label_table, under platform_mutex). This can lead to OOB accesses. This patch adds a seqcount, so that we get a consistent snapshot. Note that m
Why this priority
- High severity
- On your watchlist
A fixed release or distro patch exists.
Last updated 2026-10-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
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-2026-43042?
linux kernel: upgrade to 6.19.12. Exact commands for each OS are on this page.
Is CVE-2026-43042 being exploited?
CVE-2026-43042 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-2026-43042 affect?
CVE-2026-43042 affects linux kernel. Severity is high (CVSS 7.1). In the Linux kernel, the following vulnerability has been resolved: mpls: add seqcount to protect the platform_label{,s} pair The RCU-protected codepaths (mpls_forward, mpls_dump_routes) can have an inconsistent view of platform_labels vs
How urgent is CVE-2026-43042?
Priority 31/100. High severity; On your watchlist
Software pages
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