CVE-2026-74669
Linux kernel vulnerability
- Published22 Aug 2026
Description
In the Linux kernel, the following vulnerability has been resolved: ipvs: clear IPv4 options after rebasing tunnel ICMP errors ip_vs_in_icmp() rebases an skb from the outer ICMP packet to the quoted original request before passing it to icmp_send(). However, IPCB(skb)->opt still describes the outer IPv4 header. A timestamp option in the outer header can therefore leave an offset that points into the quoted transport header after the rebase. __ip_options_echo() treats a byte at that stale location as the option length and copies it into the fixed-size option storage on the __icmp_send() stack, causing a stack out-of-bounds write. Clear the stale option metadata after resetting the network header. Keep the remaining control block fields, including the ingress interface used by the ICMP response path.
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/37c61b3745129cbd682c557b51345828120972e5
- https://git.kernel.org/stable/c/384b4dae14277d369221d187e9b3af56c79d2e50
- https://git.kernel.org/stable/c/6f46fc460e9316062bdcdf89199eb5d7a33da33b
- https://git.kernel.org/stable/c/75eec935444db4af2123e0491936f6e273d7ea00
- https://git.kernel.org/stable/c/79ffa99202c944467e28b13b513bf2998732edff
- https://git.kernel.org/stable/c/c9413b50204738fbc429bb86bf01353c393a6c28
- https://git.kernel.org/stable/c/e0ba936287dfe9783426aac27e5fd76fe35b38c9
- https://git.kernel.org/stable/c/ed246dd85ebf27c1f6b7897834d40786c0ca3006
Frequently asked
Is CVE-2026-74669 being actively exploited?
CVE-2026-74669 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.51%.
How severe is CVE-2026-74669?
CVE-2026-74669 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.51% probability of exploitation.
How do I fix CVE-2026-74669?
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-2026-74669 against the real software inventory on every managed device, every day. 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.