CVE-2026-74669ipvs: clear IPv4 options after rebasing tunnel ICMP errors
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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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
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Received
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before 79ffa99202c944467e28b13b513bf2998732edff; from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before c9413b50204738fbc429bb86bf01353c393a6c28; from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before 37c61b3745129cbd682c557b51345828120972e5; from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before ed246dd85ebf27c1f6b7897834d40786c0ca3006; from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before 6f46fc460e9316062bdcdf89199eb5d7a33da33b; from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before 75eec935444db4af2123e0491936f6e273d7ea00; from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before 384b4dae14277d369221d187e9b3af56c79d2e50; from f2edb9f7706dcb2c0d9a362b2ba849efe3a97f5e before e0ba936287dfe9783426aac27e5fd76fe35b38c9 | CNA record |
References
- https://git.kernel.org/stable/c/79ffa99202c944467e28b13b513bf2998732edff
- https://git.kernel.org/stable/c/c9413b50204738fbc429bb86bf01353c393a6c28
- https://git.kernel.org/stable/c/37c61b3745129cbd682c557b51345828120972e5
- https://git.kernel.org/stable/c/ed246dd85ebf27c1f6b7897834d40786c0ca3006
- https://git.kernel.org/stable/c/6f46fc460e9316062bdcdf89199eb5d7a33da33b
- https://git.kernel.org/stable/c/75eec935444db4af2123e0491936f6e273d7ea00
- https://git.kernel.org/stable/c/384b4dae14277d369221d187e9b3af56c79d2e50
- https://git.kernel.org/stable/c/e0ba936287dfe9783426aac27e5fd76fe35b38c9
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.