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CVE-2022-1055 is a use-after-free vulnerability in the Linux kernel traffic-control classifier API, specifically tc_new_tfilter() in net/sched/cls_api.c. Improper object-lifetime handling can leave freed memory accessible during traffic-filter operations. A local low-privileged attacker can trigger the flaw in environments that permit unprivileged user namespaces and use the resulting memory corruption to escalate privileges.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
7 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel use-after-free vulnerability in traffic-control filter creation.
Linux kernel traffic-control filter use-after-free vulnerability.
Linux kernel traffic-control classifier use-after-free in tc_new_tfilter().
A use-after-free vulnerability in the Linux kernel tc_new_tfilter() function in net/sched/cls_api.c.
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.