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Vulnerability record · CVE-2021-43975 · published 17 November 2021

CVE-2021-43975: Linux kernel out-of-bounds write vulnerability

Linux · Linux Kernel

In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a crafted device) to trigger an out-of-bounds write via a crafted length value.

6.7 CVSS 3.1 Medium EPSS 0.55% · top 56.1% CWE-787 · Out-of-bounds write
6.7CVSS 3.1 base score, v2 4.6
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
11Affected product versions listed by NVD
14References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In the Linux kernel through 5.15.2, hw_atl_utils_fw_rpc_wait in drivers/net/ethernet/aquantia/atlantic/hw_atl/hw_atl_utils.c allows an attacker (who can introduce a crafted device) to trigger an out-of-bounds write via a crafted length value.

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

Affected products

11 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496 ExploitMailing ListPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X24M7KDC4OJOZNS3RDSYC7E
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YODMYMGZYDXQKGJGX7TJG4X
https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify%40kernel.org/T/
https://security.netapp.com/advisory/ntap-20211210-0001/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory
https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496 ExploitMailing ListPatchVendor Advisory
https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X24M7KDC4OJOZNS3RDSYC7E
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YODMYMGZYDXQKGJGX7TJG4X
https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify%40kernel.org/T/
https://security.netapp.com/advisory/ntap-20211210-0001/ Third Party Advisory
https://www.debian.org/security/2022/dsa-5096 Third Party Advisory

Track CVE-2021-43975 inside VULONE

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Source: NIST National Vulnerability Database (record CVE-2021-43975), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.