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CVE-2021-45485 is an information-disclosure vulnerability in the Linux kernel IPv6 implementation prior to version 5.13.3. The flaw is in net/ipv6/output_core.c, where IPv6 identification values are generated using a hash-table-based algorithm. Although the table is large, its design does not adequately account for an attacker’s ability to select from a large number of IPv6 source addresses. This permits an IPv6-based attacker to exploit observable identifier-generation state as an information-leak side channel. The upstream remediation replaces the affected IPv6 ID generation approach with randomized generation.
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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.
If you can’t patch tonight, do this now.
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.
14 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An information-disclosure vulnerability in the Linux kernel IPv6 implementation.
An information-disclosure vulnerability in the Linux kernel IPv6 implementation.
Linux kernel information-disclosure vulnerability in the IPv6 implementation.
Linux kernel information-disclosure vulnerability in IPv6 handling.
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.