CVE-2026-93061

gpu: host1x: Avoid stack over-read in debug output helpers

State: Published
Severity: Not scored
Published: Sep 17, 2026
Updated: Oct 19, 2026
Reserved: Sep 17, 2026

Description

In the Linux kernel, the following vulnerability has been resolved:

gpu: host1x: Avoid stack over-read in debug output helpers

host1x_debug_output() and host1x_debug_cont() used vsnprintf(), which returns the length the formatted string would have reached with an unbounded buffer. That return value was passed straight to o->fn as the number of bytes to emit.

This could cause a read past end of the output buffer if a call to host1x_debug_* produced a string longer than 256 bytes. This only affected the debugfs files as the printk debug sink ignores the number of bytes. In practice, this is very unlikely to occur.

Fix by switching to vscnprintf(), which returns the number of bytes actually written.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	6236451d83a720072053855fa63d51934024a707 to before d7a560dc912756fd8b39b28b10818d931e863d2dAffected 6236451d83a720072053855fa63d51934024a707 to before 41517c46002afd717f0f2d0975c740dd610f87feAffected 6236451d83a720072053855fa63d51934024a707 to before ebab3a25a0403bcbc0c40ef77d69d23270e45547Affected 6236451d83a720072053855fa63d51934024a707 to before 4f9f0afdbdf513a49065207ff6b7e1d15051175aAffected 6236451d83a720072053855fa63d51934024a707 to before 819dd96a6571f2b12496b080e5187ba3fa897232Affected 6236451d83a720072053855fa63d51934024a707 to before 9ad7a6ccc7b839247663d57d3dbb4481dec492deAffected 6236451d83a720072053855fa63d51934024a707 to before b00290d1dc23a5ef9a0d3103aad1fe2274e86569Affected 6236451d83a720072053855fa63d51934024a707 to before bc17ac285fb708f22a8fa2c0ed32eceb1d37e6d6Affected
LinuxLinux	3.10Affected before 3.10Not affected 5.10.270 through 5.10.Not affected 5.15.221 through 5.15.Not affected 6.1.188 through 6.1.Not affected 6.6.157 through 6.6.Not affected 6.12.110 through 6.12.Not affected 6.18.52 through 6.18.Not affected 7.2.6 through 7.2.*Not affected 7.3 and laterNot affected

Product

Versions

LinuxLinux

6236451d83a720072053855fa63d51934024a707 to before d7a560dc912756fd8b39b28b10818d931e863d2dAffected
6236451d83a720072053855fa63d51934024a707 to before 41517c46002afd717f0f2d0975c740dd610f87feAffected
6236451d83a720072053855fa63d51934024a707 to before ebab3a25a0403bcbc0c40ef77d69d23270e45547Affected
6236451d83a720072053855fa63d51934024a707 to before 4f9f0afdbdf513a49065207ff6b7e1d15051175aAffected
6236451d83a720072053855fa63d51934024a707 to before 819dd96a6571f2b12496b080e5187ba3fa897232Affected
6236451d83a720072053855fa63d51934024a707 to before 9ad7a6ccc7b839247663d57d3dbb4481dec492deAffected
6236451d83a720072053855fa63d51934024a707 to before b00290d1dc23a5ef9a0d3103aad1fe2274e86569Affected
6236451d83a720072053855fa63d51934024a707 to before bc17ac285fb708f22a8fa2c0ed32eceb1d37e6d6Affected

LinuxLinux

3.10Affected
before 3.10Not affected
5.10.270 through 5.10.*Not affected
5.15.221 through 5.15.*Not affected
6.1.188 through 6.1.*Not affected
6.6.157 through 6.6.*Not affected
6.12.110 through 6.12.*Not affected
6.18.52 through 6.18.*Not affected
7.2.6 through 7.2.*Not affected
7.3 and laterNot affected

References

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