CVE-2026-43042High· 7.1▾ TwilightIn 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 39.1 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Oct 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
0.2%
Last analysed / modified upstream
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 mpls_label_ok is also susceptible to this, so the check against RTA_DST in rtm_to_route_config, done outside platform_mutex, is not sufficient. This value gets passed to mpls_label_ok once more in both mpls_route_add and mpls_route_del, so there is no issue, but that additional check must not be removed.
Linux >= 7720c01f3f590116882e251f13c7e1d5602f8643 < 0d377825548fe598595b5a5fa4a309fb593d8fb4Linux >= 7720c01f3f590116882e251f13c7e1d5602f8643 < 8adc5b6fc876928d8c95555d30b66fa50b07421eLinux >= 7720c01f3f590116882e251f13c7e1d5602f8643 < 5bb3caf0bbfb56f1a00d2af072ac3d8395a3b9efLinux >= 7720c01f3f590116882e251f13c7e1d5602f8643 < 629ec78ef8608d955ce217880cdc3e1873af3a15Linux 4.1Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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