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CVE-2021-0920 is a race-condition use-after-free vulnerability in Linux kernel Unix-domain socket handling and garbage collection, affecting Android and other Linux deployments. The flaw is associated with unix_scm_to_skb(), unix_dgram_recvmsg(), and unix_gc(). Concurrent close() and fget() operations can leave insufficient cleanup and cause access to freed memory. Successful local exploitation can crash the system or escalate privileges without user interaction. The issue is interlinked with CVE-2021-4083.
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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.
42 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Unknown (the content only lists a blog post title referencing CVE-2021-0920 in the Linux kernel, without describing the vulnerability details).
A use-after-free flaw in the Linux kernel unix_gc() function that could result in local privilege escalation.
Linux kernel use-after-free vulnerability in unix_gc() that could result in local privilege escalation.
A use-after-free flaw in the Linux kernel unix_gc() function that could result in local privilege escalation.
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.