# CVE-2021-47241: linux: In the Linux kernel, the following vulnerability has been resolved:  ethtool: strset: fix message length calculation...

CVE-2021-47241 is fixed in linux on 1 platform, first by DEBIAN-CVE-2021-47241, released May 21, 2024. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2021-47241
- Priority: High
- CVSS: 7.5 (high)
- EPSS: 0.0103
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: May 21, 2024

## Description

In the Linux kernel, the following vulnerability has been resolved:  ethtool: strset: fix message length calculation  Outer nest for ETHTOOL_A_STRSET_STRINGSETS is not accounted for. This may result in ETHTOOL_MSG_STRSET_GET producing a warning like:      calculated message payload length (684) not sufficient     WARNING: CPU: 0 PID: 30967 at net/ethtool/netlink.c:369 ethnl_default_doit+0x87a/0xa20  and a splat.  As usually with such warnings three conditions must be met for the warning to trigger:  - there must be no skb size rounding up (e.g. reply_size of 684);  - string set must be per-device (so that the header gets populated);  - the device name must be at least 12 characters long.  all in all with current user space it looks like reading priv flags is the only place this could potentially happen. Or with syzbot :)

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | linux Debian 12.15 (bookworm) | 5.10.46-1 | [DEBIAN-CVE-2021-47241](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47241.md) | May 21, 2024 |
| Linux | linux Debian 13.5 (trixie) | 5.10.46-1 | [DEBIAN-CVE-2021-47241](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47241.md) | May 21, 2024 |
| Linux | linux Debian 14 | 5.10.46-1 | [DEBIAN-CVE-2021-47241](https://patchblox.com/security/data/fix/linux/debian-cve-2021-47241.md) | May 21, 2024 |

---

Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.