{"id":"CVE-2021-43975","title":"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 v…","summary":"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 v…","severity":"medium","cvss":6.7,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H","cwe":["CWE-787"],"vendor":"netapp","product":"cloud_backup","affected":["linux_kernel <= 5.15.2","fedora = 34","fedora = 35","debian_linux = 9.0","debian_linux = 10.0","cloud_backup","h500s_firmware","h700s_firmware","h300e_firmware","h500e_firmware","h700e_firmware","h410s_firmware","h410c_firmware"],"published":"2021-11-17","updated":"2026-10-08","sourceUpdated":"2026-10-08T22:17:13.743","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-43975","references":[{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496","label":"cve@mitre.org"},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X24M7KDC4OJOZNS3RDSYC7ELNELOLQ2N/","label":"cve@mitre.org"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YODMYMGZYDXQKGJGX7TJG4XV4L5YLLBD/","label":"cve@mitre.org"},{"url":"https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify%40kernel.org/T/","label":"cve@mitre.org"},{"url":"https://security.netapp.com/advisory/ntap-20211210-0001/","label":"cve@mitre.org"},{"url":"https://www.debian.org/security/2022/dsa-5096","label":"cve@mitre.org"},{"url":"https://git.kernel.org/pub/scm/linux/kernel/git/netdev/net.git/commit/?id=b922f622592af76b57cbc566eaeccda0b31a3496","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.debian.org/debian-lts-announce/2022/03/msg00012.html","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X24M7KDC4OJOZNS3RDSYC7ELNELOLQ2N/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/YODMYMGZYDXQKGJGX7TJG4XV4L5YLLBD/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lore.kernel.org/netdev/163698540868.13805.17800408021782408762.git-patchwork-notify%40kernel.org/T/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20211210-0001/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2022/dsa-5096","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-43975.json"},{"url":"https://access.redhat.com/security/cve/CVE-2021-43975"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2024989"},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-43975"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43975"},{"url":"https://access.redhat.com/errata/RHSA-2024:1188"},{"url":"https://access.redhat.com/errata/RHSA-2024:1404"},{"url":"https://access.redhat.com/errata/RHSA-2023:7077"},{"url":"https://access.redhat.com/errata/RHSA-2023:6901"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00551,"epssPercentile":0.45916,"ingestedAt":"2026-10-08T23:16:47.325Z","patched":["virtualization_4_hypervisor_for_rhel 8","enterprise_linux_baseos_eus_v_8_6","enterprise_linux_baseos_eus_v_8_8","enterprise_linux_baseos_v_8","codeready_linux_builder_eus_v_8_6","codeready_linux_builder_eus_v_8_8","codeready_linux_builder_v_8","enterprise_linux_real_time_for_nfv_v_8","enterprise_linux_real_time_v_8"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-08T21:11:16.924560Z"},"slug":"CVE-2021-43975","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `linux_kernel <= 5.15.2`\n- `fedora = 34`\n- `fedora = 35`\n- `debian_linux = 9.0`\n- `debian_linux = 10.0`\n- `cloud_backup`\n- `h500s_firmware`\n- `h700s_firmware`\n- `h300e_firmware`\n- `h500e_firmware`\n- `h700e_firmware`\n- `h410s_firmware`\n- `h410c_firmware`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **RHSA-2024:1188** · Red Hat · fixed in: Red Hat Virtualization 4 Hypervisor for RHEL 8, Red Hat Enterprise Linux BaseOS EUS (v.8.6), Red Hat CodeReady Linux Builder EUS (v.8.6) · released 2024-03-06 · [advisory](https://access.redhat.com/errata/RHSA-2024:1188)\n- **RHSA-2024:1404** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS EUS (v.8.8), Red Hat CodeReady Linux Builder EUS (v.8.8) · released 2024-03-19 · [advisory](https://access.redhat.com/errata/RHSA-2024:1404)\n- **RHSA-2023:7077** · Red Hat · fixed in: Red Hat Enterprise Linux BaseOS (v. 8), Red Hat CodeReady Linux Builder (v. 8) · released 2023-11-14 · [advisory](https://access.redhat.com/errata/RHSA-2023:7077)\n- **RHSA-2023:6901** · Red Hat · fixed in: Red Hat Enterprise Linux Real Time for NFV (v. 8), Red Hat Enterprise Linux Real Time (v. 8) · released 2023-11-14 · [advisory](https://access.redhat.com/errata/RHSA-2023:6901)\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · no fix planned: Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 9 · updated 2026-10-09 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2021/cve-2021-43975.json)","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":36.9,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}