9.1

CVE-2026-63992

tunnels: do not assume transport header in iptunnel_pmtud_check_icmp()

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.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 5a92cb45e34749865d03daf8d3500f77b5f6644c
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < c7b7ec3e69e673c0d6b57f74d21da50c485c598e
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 7f4f7efe7f30edd29c4988de01728bf2398217e4
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < e917d0c69f01af2bb4fbea2b66d560a53b3ac7ec
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < a096b6e34f602950af9a2b0856cd93a5f4c276d7
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 43368636c663cff6e59dde93cf4b8e43ac28eb93
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < cb549df9ce4ee15c9d5b19ddab12cf2128e4313c
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 509323077ef79a26ba0c60bb556e45c12c398b2d
Status affected
HerstellerLinux
≫
Produkt Linux
Default Statusaffected
Version 5.9
Status affected
Version 0
Version < 5.9
Status unaffected
Version <= 5.10.*
Version 5.10.259
Status unaffected
Version <= 5.15.*
Version 5.15.210
Status unaffected
Version <= 6.1.*
Version 6.1.176
Status unaffected
Version <= 6.6.*
Version 6.6.143
Status unaffected
Version <= 6.12.*
Version 6.12.93
Status unaffected
Version <= 6.18.*
Version 6.18.35
Status unaffected
Version <= 7.0.*
Version 7.0.12
Status unaffected
Version <= *
Version 7.1
Status unaffected
VulnDex Vulnerability Enrichment
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.51% 0.407
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 9.1 3.9 5.2
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/5a92cb45e34749865d03daf8d3500f77b5f6644c
https://git.kernel.org/stable/c/c7b7ec3e69e673c0d6b57f74d21da50c485c598e
https://git.kernel.org/stable/c/7f4f7efe7f30edd29c4988de01728bf2398217e4
https://git.kernel.org/stable/c/e917d0c69f01af2bb4fbea2b66d560a53b3ac7ec
https://git.kernel.org/stable/c/a096b6e34f602950af9a2b0856cd93a5f4c276d7
https://git.kernel.org/stable/c/43368636c663cff6e59dde93cf4b8e43ac28eb93
https://git.kernel.org/stable/c/cb549df9ce4ee15c9d5b19ddab12cf2128e4313c
https://git.kernel.org/stable/c/509323077ef79a26ba0c60bb556e45c12c398b2d