Description
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 products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
37e0e14128e0685267dc5c037bf655421a6ce2ea to < d6f9af093dc91dac8848a01e417b8109c651c0b2affected37e0e14128e0685267dc5c037bf655421a6ce2ea to < 1c8e01792adf91879322f1ad752f1814de8b7e7daffected37e0e14128e0685267dc5c037bf655421a6ce2ea to < 228075f31b141395233218712242913125ace4e0affected37e0e14128e0685267dc5c037bf655421a6ce2ea to < a4cef20cd473e0640fefd38094d4baac0ec76ae3affected37e0e14128e0685267dc5c037bf655421a6ce2ea to < adeee7187694719890aaffdc14b7e89cfd736f1daffected
Linux Linux
Default version status: affected
6.5affected0 to < 6.5unaffected6.6.158 to ≤ 6.6.*unaffected6.12.111 to ≤ 6.12.*unaffected6.18.53 to ≤ 6.18.*unaffected7.2.7 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/d6f9af093dc91dac8848a01e417b8109c651c0b2 ↗
- 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 ↗