CVE-2026-74473
Linux kernel vulnerability
- Published15 Aug 2026
Description
In the Linux kernel, the following vulnerability has been resolved: vxlan: use pskb_network_may_pull() in route_shortcircuit() route_shortcircuit() currently calls pskb_may_pull(skb, sizeof(struct iphdr)) (or ipv6hdr), which checks if bytes are available starting from skb->data. However, in vxlan_xmit(), skb->data points to the MAC header, so skb_network_offset(skb) is ETH_HLEN (14 bytes). Using pskb_may_pull(skb, 20) only checks 20 bytes from skb->data (which is 14 bytes MAC header + 6 bytes of IP header), leaving the rest of the IP header potentially un-pulled in non-linear frags. Subsequent dereferences of ip_hdr(skb)->daddr can read beyond the pulled linear buffer length. Fix this by using pskb_network_may_pull(), which adds skb_network_offset(skb) to the length check to ensure the full network header is present in the linear buffer.
CVSS 3.1 breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HRemediation
No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.
References
- https://git.kernel.org/stable/c/214ba43faf106cb06cd3dd30999c5c809c868b53
- https://git.kernel.org/stable/c/26bb2dd0a8839617e2c79ffbbe1923f8e4bab9fb
- https://git.kernel.org/stable/c/42887be7c4cf283cce02cd0fb6411221167c8b6c
- https://git.kernel.org/stable/c/4f3f96e771a20263635bb5e1307c112d613b4bbd
- https://git.kernel.org/stable/c/6bd0a3a1b5744166946f0c551a6665c3b46b05e4
- https://git.kernel.org/stable/c/aa0d31376d574ac858a40078431a77127bf04ee4
- https://git.kernel.org/stable/c/c419af4924c1593500a40519730ed98575d04a3e
- https://git.kernel.org/stable/c/ee799977d7941dbfb11049e17edd9eaf4f8820f7
Frequently asked
Is CVE-2026-74473 being actively exploited?
CVE-2026-74473 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.53%.
How severe is CVE-2026-74473?
CVE-2026-74473 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.53% probability of exploitation.
How do I fix CVE-2026-74473?
Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.
How Secuno handles this
Secuno correlates vulnerabilities like CVE-2026-74473 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.
Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.