What’s Vulnerable › Vulnerabilities

CVE-2026-72319: ipvs: ensure inner headers in ICMP errors are in headroom

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-15 · updated 2026-10-16

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: ensure inner headers in ICMP errors are in headroom Sashiko points out that after stripping the outer headers with pskb_pull() we should ensure the inner IP headers in ICMP errors from tunnels are present in the skb headroom for functions like ipv4_update_pmtu(), icmp_send() and IP_VS_DBG(). Also, add more checks for the length of the inner headers.

Affected products

• Linux kernel: 3.7 — fixed in 7.2

How to fix

Upgrade to a fixed version: Linux kernel 7.2. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/19657b3a17b774ae4e2f2635b5ae8638c9344a40
• https://git.kernel.org/stable/c/3f7a535ff0fa627a0132803e4c2f903ceffcbc1c
• https://git.kernel.org/stable/c/8f48cfe657409fb5c7ba0521b14da6d47546d9cf
• https://git.kernel.org/stable/c/92185d6f7819bc558939ae83de7b1abe90e3b5c2
• https://git.kernel.org/stable/c/9bc9b95aee2b2e3f1301a16a67ee504960402875
• https://git.kernel.org/stable/c/a735f9964a3d9ed97daf9b08507f8b5bcafe6326
• https://git.kernel.org/stable/c/dac813101914c21219ac221a60a31a11bc90e7ec
• https://git.kernel.org/stable/c/dd22f74a09e25ca298ced0a3763ef353242cb78d

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