CVE-2026-98086
In the Linux kernel, the following vulnerability has been resolved: ALSA: ump: do not touch legacy_rmidi before it exists snd_ump_parse_endpoint() sets ump->parsed on every exit, including error, before the caller attaches the legacy rawmidi device. ump_handle_ep_name_msg() then treats parsed as "legacy_rmidi is live" and calls ump_legacy_set_rawmidi_name(), which snprintf()s into ump->legacy_rmidi->name. If a UMP packet arrives in that window (IRQ path from snd_ump_receive), legacy_rmidi is still NULL (KASAN null-ptr-deref in snprintf). Guard the legacy helpers. parsed only means endpoint info was parsed, not that legacy_rmidi exists.
Affected versions
Linux kernel versions
6.5
and later are affected. Fixed in
6.6.158,
6.12.111,
6.18.53,
7.2.7,
7.3-rc2
and their respective stable series.
References
5 totalFrequently asked questions
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What is CVE-2026-98086?
CVE-2026-98086 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.5 onward and has been patched in 6.6.158, 6.12.111, 6.18.53 and others. CVE-2026-98086 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-98086?
Yes. CVE-2026-98086 has been patched. Fixed versions include 6.6.158, 6.12.111, 6.18.53 and others. If you are running Linux kernel 6.5 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-98086 actively exploited?
No. CVE-2026-98086 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.