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CVE-2021-43975 is an out-of-bounds write vulnerability in the Linux kernel's Aquantia AQtion Atlantic Ethernet driver, specifically in hw_atl_utils_fw_rpc_wait(). Linux kernel versions through 5.15.2 are affected. An attacker able to introduce a crafted or emulated networking device can supply a crafted length value that triggers a write outside the intended kernel-memory bounds. Exploitation can crash the system, and the resulting memory corruption may also affect confidentiality and integrity.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
13 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel Aquantia Atlantic driver out-of-bounds write in hw_atl_utils_fw_rpc_wait.
Linux kernel out-of-bounds write in Aquantia Atlantic driver firmware RPC handling.
Linux kernel out-of-bounds write in hw_atl_utils_fw_rpc_wait() in the Aquantia Atlantic driver.
Linux kernel out-of-bounds write in the Aquantia Atlantic Ethernet driver.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.