CVE-2026-64271Input: touchwin - reset the packet index on every complete packet
- 7.8HighCVSS base score
- 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: Input: touchwin - reset the packet index on every complete packet tw_interrupt() accumulates each non-zero serial byte into a fixed three-byte buffer with a running index that is only reset once a full packet has been received *and* the device's two Y bytes agree: tw->data[tw->idx++] = data; if (tw->idx == TW_LENGTH && tw->data[1] == tw->data[2]) { ... tw->idx = 0; } The reset is gated on tw->data[1] == tw->data[2], a value the device controls. A malicious, malfunctioning or counterfeit Touchwindow peripheral can stream non-zero bytes whose 2nd and 3rd bytes differ: the index reaches TW_LENGTH without the equality holding, is never reset, and keeps growing, so tw->data[tw->idx++] walks off the end of the three-byte array and the rest of the heap-allocated struct tw, one attacker-chosen byte at a time -- an unbounded, device-driven heap out-of-bounds write. Reset the index on every completed packet and report an event only when the two Y bytes match, like the other serio touchscreen drivers do.
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 |
|---|---|---|---|
| NVDNVD · Analyzed | 3.1 | High7.8 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
- EPSS (exploitation in 30 days)
- 0.17% · top 94% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.
Affected products
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < ed9b66905407eb3d02df1aaeed82eb7a7f0eb508
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < 044167cba2384bcd783547ad5e30ecd292b30919
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < 6c9f29f128dd4057404838259af4c645318487e1
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < 431ad239f2924dff337c3fccb9246597c1b63185
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < 70e4248793762df9832fd4fc2fc6ac7924572c36
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < 3e6f007b43e2fc6546e21fa74ee62c38984a6672
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < a8d87184576c889759e3aab899799a482f1e1a5b
- affected 11ea3173d5f2de71d037ef58ac43395795fed2bc – < 478cdd736f2ce3114f90e775d7358136d3977b94
- affected 2.6.19
- unaffected < 2.6.19
- unaffected 5.10.261 – ≤ 5.10.*
- unaffected 5.15.212 – ≤ 5.15.*
- unaffected 6.1.178 – ≤ 6.1.*
- unaffected 6.6.145 – ≤ 6.6.*
- unaffected 6.12.96 – ≤ 6.12.*
- unaffected 6.18.39 – ≤ 6.18.*
- unaffected 7.1.4 – ≤ 7.1.*
- unaffected 7.2 – ≤ *
References
References8
- https://git.kernel.org/stable/c/ed9b66905407eb3d02df1aaeed82eb7a7f0eb508 (opens in a new tab)
- https://git.kernel.org/stable/c/044167cba2384bcd783547ad5e30ecd292b30919 (opens in a new tab)
- https://git.kernel.org/stable/c/6c9f29f128dd4057404838259af4c645318487e1 (opens in a new tab)
- https://git.kernel.org/stable/c/431ad239f2924dff337c3fccb9246597c1b63185 (opens in a new tab)
- https://git.kernel.org/stable/c/70e4248793762df9832fd4fc2fc6ac7924572c36 (opens in a new tab)
- https://git.kernel.org/stable/c/3e6f007b43e2fc6546e21fa74ee62c38984a6672 (opens in a new tab)
- https://git.kernel.org/stable/c/a8d87184576c889759e3aab899799a482f1e1a5b (opens in a new tab)
- https://git.kernel.org/stable/c/478cdd736f2ce3114f90e775d7358136d3977b94 (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-2026-48983 (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-2026-64271)Record last updated .