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

Type: advisorySource: Official CVE List1 source record

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.

Announced Source revision 1
Original source ↗

CVE-2026-93061

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-93061

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "d7a560dc912756fd8b39b28b10818d931e863d2d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "41517c46002afd717f0f2d0975c740dd610f87fe",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "ebab3a25a0403bcbc0c40ef77d69d23270e45547",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "4f9f0afdbdf513a49065207ff6b7e1d15051175a",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "819dd96a6571f2b12496b080e5187ba3fa897232",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "9ad7a6ccc7b839247663d57d3dbb4481dec492de",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "b00290d1dc23a5ef9a0d3103aad1fe2274e86569",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6236451d83a720072053855fa63d51934024a707",
        "lessThan": "bc17ac285fb708f22a8fa2c0ed32eceb1d37e6d6",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/gpu/host1x/debug.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "3.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "3.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.270",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.221",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.188",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.157",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.110",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.52",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.2.6",
        "versionType": "semver",
        "lessThanOrEqual": "7.2.*"
      },
      {
        "status": "unaffected",
        "version": "7.3",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/gpu/host1x/debug.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-93061

Source reference: /cveMetadata/cveId

Publisher severity

No explicit severity was provided.

Event
#37796 · Revision 1
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Publisher date
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