Critical severity · published Aug 28, 2026
CVE-2026-80681
vxlan: re-fetch eth header after route_shortcircuit()
9.8
CVSS
0.5%
EPSS
No
On KEV
Description
In the Linux kernel, the following vulnerability has been resolved:
vxlan: re-fetch eth header after route_shortcircuit()
Before route_shortcircuit(), the eth header pointer is cached from eth_hdr(skb).
Inside route_shortcircuit(), pskb_may_pull() can be called, which may
reallocate skb->head.
In this case, returning to vxlan_xmit() leaves the cached eth pointer pointing to
freed memory, leading to a use-after-free when dereferencing eth->h_dest.
Fix this by updating eth = eth_hdr(skb) after calling route_shortcircuit().
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LI
Linux · Linux
ae8840825605f36f98f247323edc150e761cb64e before 6375093eb45cd7d89f1945f939eeae3b29d79f56; ae8840825605f36f98f247323edc150e761cb64e before 1b7f7b653e3557690047c62f03b80a24ea5a58a5; ae8840825605f36f98f247323edc150e761cb64e before bf045341dfb3e767f0ff94cf240ce3c371973bd4; ae8840825605f36f98f247323edc150e761cb64e before 2355c8c26d2aa1b4385b369e67202e47d460d555; ae8840825605f36f98f247323edc150e761cb64e before 1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585; ae8840825605f36f98f247323edc150e761cb64e before 1235e017aa11cf01e91b613c4c5ed6aa28934fff; +3 more · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-80681
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-80681
git.kernel.org
https://git.kernel.org/stable/c/1235e017aa11cf01e91b613c4c5ed6aa28934fff
git.kernel.org
https://git.kernel.org/stable/c/1395a676ec15a0a02a2a6d86602324f2d5fd41d5
git.kernel.org
https://git.kernel.org/stable/c/1511631b7cfc4152b10a0a9d04c7a0bf2ddf4585
git.kernel.org
https://git.kernel.org/stable/c/1b7f7b653e3557690047c62f03b80a24ea5a58a5
git.kernel.org
https://git.kernel.org/stable/c/2355c8c26d2aa1b4385b369e67202e47d460d555
git.kernel.org
https://git.kernel.org/stable/c/6375093eb45cd7d89f1945f939eeae3b29d79f56
More from Linux
9.8
CVE-2025-39682
tls: fix handling of zero-length records on the rx_list
8.8
CVE-2026-53266
netfilter: bridge: make ebt_snat ARP rewrite writable
7.8
CVE-2026-53362
ipv6: account for fraggap on the paged allocation path
7.8
CVE-2026-31431
crypto: algif_aead - Revert to operating out-of-place
7.8
CVE-2025-38352
posix-cpu-timers: fix race between handle_posix_cpu_timers() and posix_cpu_timer_del()