{"id":"CVE-2026-98086","published":"2026-09-25T11:17:38.200","lastModified":"2026-09-25T11:17:38.200","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nALSA: ump: do not touch legacy_rmidi before it exists\n\nsnd_ump_parse_endpoint() sets ump->parsed on every exit, including\nerror, before the caller attaches the legacy rawmidi device.\nump_handle_ep_name_msg() then treats parsed as \"legacy_rmidi is live\"\nand calls ump_legacy_set_rawmidi_name(), which snprintf()s into\nump->legacy_rmidi->name. If a UMP packet arrives in that window\n(IRQ path from snd_ump_receive), legacy_rmidi is still NULL\n(KASAN null-ptr-deref in snprintf).\n\nGuard the legacy helpers. parsed only means endpoint info was\nparsed, not that legacy_rmidi exists.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":[],"vendors":[],"products":[],"references":[{"url":"https://git.kernel.org/stable/c/1c8e01792adf91879322f1ad752f1814de8b7e7d","tags":[]},{"url":"https://git.kernel.org/stable/c/228075f31b141395233218712242913125ace4e0","tags":[]},{"url":"https://git.kernel.org/stable/c/a4cef20cd473e0640fefd38094d4baac0ec76ae3","tags":[]},{"url":"https://git.kernel.org/stable/c/adeee7187694719890aaffdc14b7e89cfd736f1d","tags":[]}],"exploitRefs":[],"hasPoc":false,"ai":null}