CVE-2026-74502ALSA: ump: fix double free of out_cvts on rawmidi error
- —Not scoredno CVSS score yet
- 0.17%Exploitation in 30 daysEPSS · top 94% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
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 <[email protected]>
Timeline
ID reserved
By Linux
Published
- 2 days later
· 2 days later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
No CVSS score yet: neither the CNA, CISA nor NVD has scored this CVE. NVD status: Received.
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (13 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 – < e84d2e53a05c78a04d1343eeb0f31a79456e79fc
- affected 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 – < 3302aaeac4f7ee6b775850db21d5f61064ce70ad
- affected 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 – < 032746c2dd9a4ea0774b04ac8a29e2ea628f106e
- affected 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 – < c57001f55f97ef856fb6527e376c5c4a056a53a4
- affected 33cd7630782df2230529c3e8f1a6d0ae9cd6ab49 – < 70c977815af0d997feb2d0c5d284d55689bf7051
- affected 6.5
- unaffected < 6.5
- unaffected 6.6.151 – ≤ 6.6.*
- unaffected 6.12.103 – ≤ 6.12.*
- unaffected 6.18.44 – ≤ 6.18.*
- unaffected 7.1.8 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References5
- https://git.kernel.org/stable/c/e84d2e53a05c78a04d1343eeb0f31a79456e79fc (opens in a new tab)
- https://git.kernel.org/stable/c/3302aaeac4f7ee6b775850db21d5f61064ce70ad (opens in a new tab)
- https://git.kernel.org/stable/c/032746c2dd9a4ea0774b04ac8a29e2ea628f106e (opens in a new tab)
- https://git.kernel.org/stable/c/c57001f55f97ef856fb6527e376c5c4a056a53a4 (opens in a new tab)
- https://git.kernel.org/stable/c/70c977815af0d997feb2d0c5d284d55689bf7051 (opens in a new tab)
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2026-59695 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2026-74502)Record last updated .