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CVE-2026-64029 is a race-condition-driven use-after-free in the Linux kernel ALSA sequencer Universal MIDI Packet (UMP) client output path. The event-processing path can obtain the client output rawmidi file without synchronization while a concurrent final output close releases that file and frees its rawmidi substream runtime. An in-flight rawmidi kernel write can subsequently dereference the freed runtime. KASAN reproduced the condition as a slab use-after-free in the rawmidi write path. The fix adds an IRQ-safe per-client read/write lock: event processing holds the read lock from output-file lookup through completion of the rawmidi write, while final close clears the visible output file under the write lock and releases the saved file only after dropping the lock.
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What an attacker gets, and what they’ve been doing with it.
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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.
18 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Linux kernel vulnerability fixed by USN-8802-1.
A vulnerability addressed by the Rocky Linux 9 kernel update; technical details are not provided.
A specific vulnerability addressed by the AlmaLinux 10 kernel update; no per-CVE technical detail is supplied.
A vulnerability addressed by the Oracle Linux 10 kernel-package security update.
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.