CVE-2026-64014Input: usbtouchscreen - clamp NEXIO data_len/x_len to URB buffer size
- 7.1HighCVSS base score
- 0.13%Exploitation in 30 daysEPSS · top 98% 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: Input: usbtouchscreen - clamp NEXIO data_len/x_len to URB buffer size nexio_read_data() pulls data_len and x_len from a packed __be16 header in the device's interrupt packet and then walks packet->data[0..x_len) and packet->data[x_len..data_len) comparing each byte against a threshold. Both fields are 16-bit on the wire (max 65535). The existing adjustments shave at most 0x100 / 0x80 off, so the loop bound can still reach roughly 0xfeff. The URB transfer buffer for NEXIO is rept_size (1024) bytes from usb_alloc_coherent(), with the first 7 occupied by the packed header — so packet->data[] has 1017 valid bytes. read_data() callbacks are not given urb->actual_length, and nothing else bounds the walk. A device that lies about its length can get a ~64 KiB out-of-bounds read past the coherent DMA allocation. The first index whose byte exceeds NEXIO_THRESHOLD lands in begin_x / begin_y and from there into the reported touch coordinates, so adjacent kernel memory contents leak to userspace as ABS_X / ABS_Y events. Far enough out, the read can also hit an unmapped page and fault. Fix this all by clamping data_len to the buffer's data[] capacity and x_len to data_len.
Timeline
ID reserved
By Linux
Published
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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.1 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H |
- EPSS (exploitation in 30 days)
- 0.13% · top 98% of all CVEs (12 Nov 2026)
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.1.
Affected products
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < 45c829e5eb3b974282bae50b7cca2cc891f74f0b
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < e7cdcb266ba06d8480809b78ab8bb2bf8ff51ccb
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < 95f47331dfde243f93e679ce70bd0c24b37c683d
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < d883312061ccde8c536595998aaf687ec070077c
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < 103d2de9f505f56da173e43f12dba62f92620278
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < 0ca809ea8e0355299266c46e5f1755040aa8dcf3
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < 7585b6aa55d8ac85ad22f522e1059f93507727b6
- affected 5197424cdcccd2b0b1922babb93969b2515c43ce – < 2905281cbda52ec9df540113b35b835feb5fafd3
- affected 2.6.34
- unaffected < 2.6.34
- unaffected 5.10.259 – ≤ 5.10.*
- unaffected 5.15.210 – ≤ 5.15.*
- unaffected 6.1.176 – ≤ 6.1.*
- unaffected 6.6.143 – ≤ 6.6.*
- unaffected 6.12.93 – ≤ 6.12.*
- unaffected 6.18.35 – ≤ 6.18.*
- unaffected 7.0.12 – ≤ 7.0.*
- unaffected 7.1 – ≤ *
References
References8
- https://git.kernel.org/stable/c/45c829e5eb3b974282bae50b7cca2cc891f74f0b (opens in a new tab)
- https://git.kernel.org/stable/c/e7cdcb266ba06d8480809b78ab8bb2bf8ff51ccb (opens in a new tab)
- https://git.kernel.org/stable/c/95f47331dfde243f93e679ce70bd0c24b37c683d (opens in a new tab)
- https://git.kernel.org/stable/c/d883312061ccde8c536595998aaf687ec070077c (opens in a new tab)
- https://git.kernel.org/stable/c/103d2de9f505f56da173e43f12dba62f92620278 (opens in a new tab)
- https://git.kernel.org/stable/c/0ca809ea8e0355299266c46e5f1755040aa8dcf3 (opens in a new tab)
- https://git.kernel.org/stable/c/7585b6aa55d8ac85ad22f522e1059f93507727b6 (opens in a new tab)
- https://git.kernel.org/stable/c/2905281cbda52ec9df540113b35b835feb5fafd3 (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-2026-45587 (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)
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[](https://cveledger.app/cve/CVE-2026-64014)Record last updated .