CVE-2026-64490ALSA: virtio: Validate control metadata from the device
- 8.4HighCVSS base score
- 0.19%Exploitation in 30 daysEPSS · top 91% 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: virtio: Validate control metadata from the device virtio-snd control handling trusts the device-provided control type and value count returned by the device. That metadata is then used directly to index g_v2a_type_map[] in virtsnd_kctl_info(), and to size loops and memcpy() operations in virtsnd_kctl_get() and virtsnd_kctl_put() against fixed-size virtio_snd_ctl_value and snd_ctl_elem_value arrays. A buggy or malicious device can therefore trigger out-of-bounds access by advertising an invalid control type or an oversized value count. Validate control type and count once in virtsnd_kctl_parse_cfg(), before querying enumerated items or exposing the control to ALSA.
Timeline
ID reserved
By Linux
- 6 days later
· 6 days later
Published
- 3 months later
· 3 months 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
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| LinuxCNA (assigner) | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| NVDNVD · Analyzed | 3.1 | High8.4 | CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.19% · top 91% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: total
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 8.4.
Affected products
- affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 – < 3243563f99ef5d3949b934bd6390a5679405d0e1
- affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 – < 5da9742de22db0dbaa8d414214ab5e1bedde00f9
- affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 – < 21584672fd699abe1768241d6c501b2de6139b6a
- affected d6568e3de42dd971a1356f7ba581e6600d53f0a0 – < c77a6cbb36ff8cbc1f084d94f8dcda5250935271
- affected 6.9
- unaffected < 6.9
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References4
- https://git.kernel.org/stable/c/3243563f99ef5d3949b934bd6390a5679405d0e1 (opens in a new tab)
- https://git.kernel.org/stable/c/5da9742de22db0dbaa8d414214ab5e1bedde00f9 (opens in a new tab)
- https://git.kernel.org/stable/c/21584672fd699abe1768241d6c501b2de6139b6a (opens in a new tab)
- https://git.kernel.org/stable/c/c77a6cbb36ff8cbc1f084d94f8dcda5250935271 (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-2026-48834 (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-2026-64490)Record last updated .