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CVE-2022-49865

7.1 · HIGH

In the Linux kernel, the following vulnerability has been resolved: ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network When copying a `struct ifaddrlblmsg` to the network,…

Published May 1, 2025CWE-909EPSS 0.22%

Overview

CVE-2022-49865 is a high-severity vulnerability. It was published on May 1, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

In the Linux kernel, the following vulnerability has been resolved:

ipv6: addrlabel: fix infoleak when sending struct ifaddrlblmsg to network

When copying a `struct ifaddrlblmsg` to the network, __ifal_reserved

remained uninitialized, resulting in a 1-byte infoleak:

BUG: KMSAN: kernel-network-infoleak in __netdev_start_xmit ./include/linux/netdevice.h:4841

__netdev_start_xmit ./include/linux/netdevice.h:4841

netdev_start_xmit ./include/linux/netdevice.h:4857

xmit_one net/core/dev.c:3590

dev_hard_start_xmit+0x1dc/0x800 net/core/dev.c:3606

__dev_queue_xmit+0x17e8/0x4350 net/core/dev.c:4256

dev_queue_xmit ./include/linux/netdevice.h:3009

__netlink_deliver_tap_skb net/netlink/af_netlink.c:307

__netlink_deliver_tap+0x728/0xad0 net/netlink/af_netlink.c:325

netlink_deliver_tap net/netlink/af_netlink.c:338

__netlink_sendskb net/netlink/af_netlink.c:1263

netlink_sendskb+0x1d9/0x200 net/netlink/af_netlink.c:1272

netlink_unicast+0x56d/0xf50 net/netlink/af_

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refgit.kernel.org/stable/c/0f85b7ae7c4b5d7b4bbf7ac653a733c181a8a2bfRefgit.kernel.org/stable/c/2acb2779b147decd300c117683d5a32ce61c75d6Refgit.kernel.org/stable/c/49e92ba5ecd7d72ba369dde2ccff738edd028a47Refgit.kernel.org/stable/c/568a47ff756f913e8b374c2af9d22cd2c772c744Refgit.kernel.org/stable/c/58cd7fdc8c1e6c7873acc08f190069fed88d1c12Refgit.kernel.org/stable/c/6d26d0587abccb9835382a0b53faa7b9b1cd83e3Refgit.kernel.org/stable/c/a033b86c7f7621fde31f0364af8986f43b44914fRefgit.kernel.org/stable/c/c23fb2c82267638f9d206cb96bb93e1f93ad7828

How CyberStrike helps

Frequently asked questions

What is CVE-2022-49865?

CVE-2022-49865 is a high-severity vulnerability. It was published on May 1, 2025 and has a CVSS 3.1 base score of 7.1 (HIGH).

How severe is CVE-2022-49865?

This vulnerability has a CVSS 3.1 base score of 7.1, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2022-49865?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2022-49865?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2022-49865 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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