CVE-2026-97929ALSA: usbusx2y: validate URB actual_length in interrupt callback
- —Not scoredno CVSS score yet
- 0.20%Exploitation in 30 daysEPSS · top 90% 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: usbusx2y: validate URB actual_length in interrupt callback i_usx2y_in04_int() processes the interrupt URB data without checking urb->actual_length. A short transfer from a malfunctioning device would cause the handler to process uninitialized heap data from the kmalloc-allocated in04_buf, which is then copied to the mmap-accessible ctl_snapshot[] array. Fix by using kzalloc() for in04_buf to zero-initialize the buffer, and adding an actual_length check to skip processing on short transfers while still resubmitting the URB.
Timeline
ID reserved
By Linux
Published
- 26 days later
· 26 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)
- 0.20% · top 90% of all CVEs (15 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: Not scored.
Affected products
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c3576cb77b527f223cf2b9fc2b2e9af5e7adee25
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < c156584999bf15118f523ef6c6fedc5b21f46bd9
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 2770321b358658e0a39fe39ccf6a91ee97a81931
- affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 – < 8f5ef203abda9dd36b2af473c7b737d544f807bd
- affected 2.6.12
- unaffected < 2.6.12
- unaffected 6.6.160 – ≤ 6.6.*
- unaffected 6.12.111 – ≤ 6.12.*
- unaffected 6.18.53 – ≤ 6.18.*
- unaffected 7.2.7 – ≤ 7.2.*
- unaffected 7.3 – ≤ *
References
References5
- https://git.kernel.org/stable/c/c3576cb77b527f223cf2b9fc2b2e9af5e7adee25 (opens in a new tab)
- https://git.kernel.org/stable/c/c156584999bf15118f523ef6c6fedc5b21f46bd9 (opens in a new tab)
- https://git.kernel.org/stable/c/b0c30fe6c0d5902bd8a7d1d5720bead5bbe46f7d (opens in a new tab)
- https://git.kernel.org/stable/c/2770321b358658e0a39fe39ccf6a91ee97a81931 (opens in a new tab)
- https://git.kernel.org/stable/c/8f5ef203abda9dd36b2af473c7b737d544f807bd (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-2026-86783 (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-2026-97929)Record last updated .