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CVE-2026-63924

CRITICALCVSS 9.8/10EPSS 0.69%

Last modified

CVE-2026-63924 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() ipv6_hop_jumbo() calls pskb_trim_rcsum(), which can change skb pointers. Let's recompute nh pointer to make sure any change won't mess things up.. EPSS estimates a 0.69% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() ipv6_hop_jumbo() calls pskb_trim_rcsum(), which can change skb pointers. Let's recompute nh pointer to make sure any change won't mess things up.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
0.69%

49.2th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

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

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < b3ac54e5c905f86d22b502eacb5686a282c5659f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 645b99b1a185c91a79bdac4c5de0f91b212d64f0; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9e883eaa878f4337b5873c706efb5a192364ed18; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < bddaa4dfc7f36e1ee343a0622f69288af2b9ace9; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 72af7beae774e46ed543f3f2f267bf0a141bfcdd; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < c512e1c819dfbf6ae95ee7a44b65b9ad98979157; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 2b56bbd928c030894c270cd33d60286326919458; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < d47548a36639095939f4747d4c43f2271366f565
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Awaiting Analysis

Frequently Asked Questions

What is CVE-2026-63924?
In the Linux kernel, the following vulnerability has been resolved: ipv6: exthdrs: refresh nh pointer after ipv6_hop_jumbo() ipv6_hop_jumbo() calls pskb_trim_rcsum(), which can change skb pointers. Let's recompute nh pointer to make sure any change won't mess things up.
How severe is CVE-2026-63924?
CVE-2026-63924 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.69% probability of exploitation in the next 30 days.
How do I fix CVE-2026-63924?
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