CVE-2026-23442
Medium
Description
In the Linux kernel, the following vulnerability has been resolved: ipv6: add NULL checks for idev in SRv6 paths __in6_dev_get() can return NULL when the device has no IPv6 configuration (e.g. MTU < IPV6_MIN_MTU or after NETDEV_UNREGISTER). Add NULL checks for idev returned by __in6_dev_get() in both seg6_hmac_validate_skb() and ipv6_srh_rcv() to prevent potential NULL pointer dereferences.
SeverityMedium
CVSS5.5
Exploit probability—
Product
Linux Kernel
PublishedApr 3, 2026
First seenApr 3, 2026
Weakness typeCWE-476NULL pointer dereference
How to fix
Update
- linux linux_kernel6.12.83, 6.19.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| linux linux_kernel | 4.10.1 ≤ v < 6.12.83, 6.13 ≤ v < 6.19.10, 4.10, 7.0 | 6.12.83, 6.19.10 |
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