9.8

CVE-2026-63994

tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()

In the Linux kernel, the following vulnerability has been resolved:

tunnels: load network headers after skb_cow() in iptunnel_pmtud_build_icmp[v6]()

Sashiko found that iptunnel_pmtud_build_icmp() and
iptunnel_pmtud_build_icmpv6() were caching ip_hdr() and ipv6_hdr()
before an skb_cow() call which can reallocate skb->head.

Fix this possible UAF by initializing the local variables
after the skb_cow() call.

Remove skb_reset_network_header() calls which were not needed.
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerLinux
≫
Produkt Linux
Default Statusunaffected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 95b6d772bfe788331d9742d73eaa12e113b2adc4
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 7254aef4d1a7e18e887af9010e2f2dc34806789b
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < bf8b3f34c37c162357138e7c0942723b8b94fed1
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 76cd9398a0470257ab765bdf5f358a2af2e17934
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 50750d86a2e5266aba0c295483b3397843198b11
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < 6dff77899b9e9fe5d854abda3a98ad04e7229ef7
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < f3f204541f280a6ecb04503a0d6794d93990ca43
Status affected
Version 4cb47a8644cc9eb8ec81190a50e79e6530d0297f
Version < b4bc94353050b1fa7b702bd4c6600710dd926cff
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 0.52% 0.408
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
416baaa9-dc9f-4396-8d5f-8c081fb06d67 9.8 3.9 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Es wurden noch keine Informationen zu CWE veröffentlicht.
https://git.kernel.org/stable/c/95b6d772bfe788331d9742d73eaa12e113b2adc4
https://git.kernel.org/stable/c/7254aef4d1a7e18e887af9010e2f2dc34806789b
https://git.kernel.org/stable/c/bf8b3f34c37c162357138e7c0942723b8b94fed1
https://git.kernel.org/stable/c/76cd9398a0470257ab765bdf5f358a2af2e17934
https://git.kernel.org/stable/c/50750d86a2e5266aba0c295483b3397843198b11
https://git.kernel.org/stable/c/6dff77899b9e9fe5d854abda3a98ad04e7229ef7
https://git.kernel.org/stable/c/f3f204541f280a6ecb04503a0d6794d93990ca43
https://git.kernel.org/stable/c/b4bc94353050b1fa7b702bd4c6600710dd926cff