Critical severity10.0NVD Advisory· Published Aug 22, 2026· Updated Aug 25, 2026
CVE-2026-74705
CVE-2026-74705
Description
In the Linux kernel, the following vulnerability has been resolved:
udp: fix potential use-after-free in tunnel segmentation
__skb_udp_tunnel_segment() gets the UDP header before ensuring the tunnel header is in the skb head. If the pull reallocates skb->head, the saved UDP header pointer is no longer valid.
Get the UDP header after the pull to avoid a potential use-after-free.
Affected products
15- osv-coords14 versionspkg:linux/kernelpkg:rpm/opensuse/dtb-aarch64&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-64kb&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-azure&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-default-base&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-docs&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-kvmsmall&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-build&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-obs-qa&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-rt&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-source&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-syms&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/kernel-zfcpdump&distro=openSUSE%20Leap%2016.0
>= 4.6.0, < 5.10.265+ 13 more
- (no CPE)range: >= 4.6.0, < 5.10.265
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1.160000.2.22
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
- (no CPE)range: < 6.12.0-160000.38.1
Patches
Vulnerability mechanics
References
8- git.kernel.org/stable/c/19d89b13a43640b2da2f277ee462d919d988cb6fnvd
- git.kernel.org/stable/c/1ae134c012e10384cdac420b5cc6e0615cde0b55nvd
- git.kernel.org/stable/c/5161e67c561c4f28a5d9335a6e859b02511de92bnvd
- git.kernel.org/stable/c/588d4a6795d99d080f74ef0b5f391ea8c453ae5dnvd
- git.kernel.org/stable/c/64d322c288577793eedd352b96ef75234ed380fenvd
- git.kernel.org/stable/c/6a733a38b983d8c2e222f13968209010cf44de87nvd
- git.kernel.org/stable/c/b3df61bb745eb5201eac22679a2839d4ccbf3442nvd
- git.kernel.org/stable/c/d0f86fb36eb260abd10007b62c9dcc1028e03e61nvd
News mentions
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