CVE-2026-64271

CVE CVE-2026-64271EUVD EUVD-2026-48983Published 2026-07-25T08:49:18.000Z

What the advisory describes

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.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

• Linux — Linux patch: 5.15.212; patch: 7.2-rc1; patch: 6.12.96; 11ea3173d5f2de71d037ef58ac43395795fed2bc <ed9b66905407eb3d02df1aaeed82eb7a7f0eb508; 2.6.19; patch: 6.6.145; patch: 6.1.178; 11ea3173d5f2de71d037ef58ac43395795fed2bc <431ad239f2924dff337c3fccb9246597c1b63185; 11ea3173d5f2de71d037ef58ac43395795fed2bc <a8d87184576c889759e3aab899799a482f1e1a5b; 11ea3173d5f2de71d037ef58ac43395795fed2bc <70e4248793762df9832fd4fc2fc6ac7924572c36; 11ea3173d5f2de71d037ef58ac43395795fed2bc <044167cba2384bcd783547ad5e30ecd292b30919; patch: 5.10.261; 11ea3173d5f2de71d037ef58ac43395795fed2bc <6c9f29f128dd4057404838259af4c645318487e1; 11ea3173d5f2de71d037ef58ac43395795fed2bc <3e6f007b43e2fc6546e21fa74ee62c38984a6672; patch: 6.18.39; patch: 0; patch: 7.1.4; 11ea3173d5f2de71d037ef58ac43395795fed2bc <478cdd736f2ce3114f90e775d7358136d3977b94

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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