CVE-2026-63924 (CVSS 9.8)

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.

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CVSS v3.1 Score

9.8

CRITICAL

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

EPSS — Exploit Prediction

0.0070

Probability of exploitation

0.49%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

References

Other References

https://git.kernel.org/stable/c/2b56bbd928c030894c270cd33d60286326919458 https://git.kernel.org/stable/c/645b99b1a185c91a79bdac4c5de0f91b212d64f0 https://git.kernel.org/stable/c/72af7beae774e46ed543f3f2f267bf0a141bfcdd https://git.kernel.org/stable/c/9e883eaa878f4337b5873c706efb5a192364ed18 https://git.kernel.org/stable/c/b3ac54e5c905f86d22b502eacb5686a282c5659f https://git.kernel.org/stable/c/bddaa4dfc7f36e1ee343a0622f69288af2b9ace9 https://git.kernel.org/stable/c/c512e1c819dfbf6ae95ee7a44b65b9ad98979157 https://git.kernel.org/stable/c/d47548a36639095939f4747d4c43f2271366f565

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. It has a CVSS v3.1 base score of 9.8 (CRITICAL).

How severe is CVE-2026-63924? +

CVE-2026-63924 has a CVSS v3.1 score of 9.8 out of 10, rated CRITICAL. This is a critical vulnerability that should be patched immediately. The EPSS score is 0.0070, placing it in the 0th percentile for exploitation probability.

How do I check if I'm vulnerable to CVE-2026-63924? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

CVE-2026-63924