CVE-2026-74502
In the Linux kernel, the following vulnerability has been resolved: ALSA: ump: fix double free of out_cvts on rawmidi error snd_ump_attach_legacy_rawmidi() allocates the legacy conversion array ump->out_cvts and, on the snd_rawmidi_new() error path,…
Does this matter?
Not yet scored. NVD analysis is pending; check back once CVSS and EPSS values are published.
Description
In the Linux kernel, the following vulnerability has been resolved: ALSA: ump: fix double free of out_cvts on rawmidi error snd_ump_attach_legacy_rawmidi() allocates the legacy conversion array ump->out_cvts and, on the snd_rawmidi_new() error path, frees it with kfree() but leaves ump->out_cvts pointing at the freed memory. When the endpoint is later torn down, snd_ump_endpoint_free() frees ump->out_cvts a second time, resulting in a double free. The host snd-usb-audio driver attaches the legacy rawmidi for any USB MIDI 2.0 (UMP) device, so a device that makes snd_rawmidi_new() fail reaches this path on enumeration. Clear ump->out_cvts after freeing it on the error path so it is not freed again during teardown. Discovered by XBOW, triaged by Baul Lee <baul.lee@xbow.com>
- CVSS
- Not yet scored
- EPSS
- 0.17% probability · 6th percentile
- CISA KEV
- Not listed
- Source
- 416baaa9-dc9f-4396-8d5f-8c081fb06d67
References
- https://git.kernel.org/stable/c/032746c2dd9a4ea0774b04ac8a29e2ea628f106e
- https://git.kernel.org/stable/c/3302aaeac4f7ee6b775850db21d5f61064ce70ad
- https://git.kernel.org/stable/c/70c977815af0d997feb2d0c5d284d55689bf7051
- https://git.kernel.org/stable/c/c57001f55f97ef856fb6527e376c5c4a056a53a4
- https://git.kernel.org/stable/c/e84d2e53a05c78a04d1343eeb0f31a79456e79fc
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.