CVE-2026-63992
CVE CVE-2026-63992EUVD EUVD-2026-45565Published 2026-07-19T14:56:12.000ZLast changed 2026-08-05T12:37:55.000ZCVSS 9.1
What the advisory describes
In the Linux kernel, the following vulnerability has been resolved: tunnels: do not assume transport header in iptunnel_pmtud_check_icmp() In some cases, iptunnel_pmtud_check_icmp() can be called while skb transport header is not set. This triggers an out-of-bound access, because (typeof(skb->transport_header))~0U is 65535. Access the icmp header based on IPv4 network header, after making sure icmp->type is present in skb linear part. Note that iptunnel_pmtud_check_icmpv6()) is fine.
Source: EUVD (ENISA), in the words of the advisory.
Products the advisory names
These come from the advisory itself, not from any check we performed.
- Linux — Linux 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <c7b7ec3e69e673c0d6b57f74d21da50c485c598e; patch: 5.10.259; 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <a096b6e34f602950af9a2b0856cd93a5f4c276d7; patch: 0; 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <43368636c663cff6e59dde93cf4b8e43ac28eb93; 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <509323077ef79a26ba0c60bb556e45c12c398b2d; patch: 6.6.143; patch: 6.18.35; patch: 6.1.176; patch: 7.1; patch: 6.12.93; 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <cb549df9ce4ee15c9d5b19ddab12cf2128e4313c; 5.9; patch: 5.15.210; 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <5a92cb45e34749865d03daf8d3500f77b5f6644c; 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <7f4f7efe7f30edd29c4988de01728bf2398217e4; 4cb47a8644cc9eb8ec81190a50e79e6530d0297f <e917d0c69f01af2bb4fbea2b66d560a53b3ac7ec; patch: 7.0.12
The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.
Carried in the product catalogue
An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.
- Linux — Linux
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