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CVE-2026-74724

Unknown

Last modified

CVE-2026-74724 is a vulnerability of currently unknown severity. In the Linux kernel, the following vulnerability has been resolved: ipvs: avoid out-of-bounds write in ip_vs_nat_icmp Sashiko warns that local attacker can modify the packet while it is processed by IPVS. Some places read the IP ihl field multiple times which can cause out-of-bounds access.

Description

In the Linux kernel, the following vulnerability has been resolved: ipvs: avoid out-of-bounds write in ip_vs_nat_icmp Sashiko warns that local attacker can modify the packet while it is processed by IPVS. Some places read the IP ihl field multiple times which can cause out-of-bounds access. One such place is ip_vs_nat_icmp where we can write after the validated area. Fix it by providing ciph argument just like it is done for IPv6 and use ciph->len as offset to the embedded transport header. Modify some IPv4 header checks by reading the ihl field only once.

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3b8f79af0e98f27b932b0b416e9c52b692d31ff9; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 3c779b258c9c3c3567af68d4f45c2f751f35bd0e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < be65fa324640c7a95e30b146159a2be5cc73f22e; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < a69a4b3fff5814d079beff9a1e9d369994b2ed47; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 243d0187ec4c3837b9b0004f18d1068e46115760; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 646922a0379496154e8c8faca4f8e2fd9100cacc
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Received

Frequently Asked Questions

What is CVE-2026-74724?
In the Linux kernel, the following vulnerability has been resolved: ipvs: avoid out-of-bounds write in ip_vs_nat_icmp Sashiko warns that local attacker can modify the packet while it is processed by IPVS. Some places read the IP ihl field multiple times which can cause out-of-bounds access. One such place is ip_vs_nat_icmp where we can write after the validated area. Fix it by providing ciph argument just like it is done for IPv6 and use ciph->len as offset to the embedded transport header. Modify some IPv4 header checks by reading the ihl field only once.
How severe is CVE-2026-74724?
Severity scoring for CVE-2026-74724 is pending analysis.
How do I fix CVE-2026-74724?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST