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CVE PROGRAM SOURCE RECORDUnscored

CVE-2026-74502

ALSA: ump: fix double free of out_cvts on rawmidi error

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Status
Published
Published
Updated
Assigning organization
Linux

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>

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

  • 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 to < e84d2e53a05c78a04d1343eeb0f31a79456e79fcaffected
  • 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 to < 3302aaeac4f7ee6b775850db21d5f61064ce70adaffected
  • 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 to < 032746c2dd9a4ea0774b04ac8a29e2ea628f106eaffected
  • 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 to < c57001f55f97ef856fb6527e376c5c4a056a53a4affected
  • 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 to < 70c977815af0d997feb2d0c5d284d55689bf7051affected

Linux Linux

Default version status: affected

  • 6.5affected
  • 0 to < 6.5unaffected
  • 6.6.151 to ≤ 6.6.*unaffected
  • 6.12.103 to ≤ 6.12.*unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References