# CVE-2022-49766: netlink: Bounds-check struct nlmsgerr creation

CVE-2022-49766 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49766, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2022-49766
- Priority: Routine
- CVSS: 5.5 (Moderate)
- EPSS: 0.0017
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 1, 2025
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-49766

## Description

In the Linux kernel, the following vulnerability has been resolved:  netlink: Bounds-check struct nlmsgerr creation  In preparation for FORTIFY_SOURCE doing bounds-check on memcpy(), switch from __nlmsg_put to nlmsg_put(), and explain the bounds check for dealing with the memcpy() across a composite flexible array struct. Avoids this future run-time warning:    memcpy: detected field-spanning write (size 32) of single field "&errmsg->msg" at net/netlink/af_netlink.c:2447 (size 16)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 6.0.10-1 | [DEBIAN-CVE-2022-49766](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49766.md) | May 1, 2025 |
| Linux | linux Debian 13.5 (trixie) | 6.0.10-1 | [DEBIAN-CVE-2022-49766](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49766.md) | May 1, 2025 |
| Linux | linux Debian 14 | 6.0.10-1 | [DEBIAN-CVE-2022-49766](https://patchblox.com/security/data/fix/linux/debian-cve-2022-49766.md) | May 1, 2025 |

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