CVE-2026-98086
N/A
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 37e0e14128e0685267dc5c037bf655421a6ce2ea < 1c8e01792adf91879322f1ad752f1814de8b7e7d | affected |
| Linux | Linux | 37e0e14128e0685267dc5c037bf655421a6ce2ea < 228075f31b141395233218712242913125ace4e0 | affected |
| Linux | Linux | 37e0e14128e0685267dc5c037bf655421a6ce2ea < a4cef20cd473e0640fefd38094d4baac0ec76ae3 | affected |
| Linux | Linux | 37e0e14128e0685267dc5c037bf655421a6ce2ea < adeee7187694719890aaffdc14b7e89cfd736f1d | affected |
| Linux | Linux | 6.5 | affected |
| Linux | Linux | 0 < 6.5 | unaffected |
| Linux | Linux | 6.12.111 <= 6.12.* | unaffected |
| Linux | Linux | 6.18.53 <= 6.18.* | unaffected |
| Linux | Linux | 7.2.7 <= 7.2.* | unaffected |
| Linux | Linux | 7.3-rc2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d
- https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0
- https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3
- https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d
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