Skip to content
Heist/ feed
High

Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: Input: synaptics-rmi4 - bound the F3A keymap to the GPIO count rmi_f3a_initialize() takes the GPIO count from the device query register (f3a->gpio_count = buf & RMI_F3A_GPIO_COUNT, range 0..127). rmi_f3a_map_gpios() then allocates gpio_key_map with min(gpio_count, TRACKSTICK_RANGE_END) == at most 6 entries, but rmi_f3a_attention() iterates the full gpio_count and dereferences gpio_key_map[i], and input->keycodemax is set to the full gpio_count while input->keycode points at the 6-entry allocation. A device that reports gpio_count > 6 therefore causes an out-of-bounds read of gpio_key_map[] on every attention interrupt, and out-of-bounds accesses through the input core's default keymap ioctls: EVIOCGKEYCODE reads past the buffer (leaking adjacent slab memory to user space) and EVIOCSKEYCODE writes a caller-controlled value past it, for any process able to open the evdev node, since input_default_getkeycode() and input_default_setkeycode() only bound the index against keycodemax. Size the keymap for the full gpio_count. The mapping loop is unchanged: it still assigns only the first min(gpio_count, TRACKSTICK_RANGE_END) entries; the remaining slots stay KEY_RESERVED (devm_kcalloc zero-fills) and are skipped when reporting.

Announced Source revision 1
Original source ↗

CVE-2026-64277

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-2026-64277

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": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "502ad7caaa1a445b734c827fa256e5311df67e3d",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "3480e24bc4e178aaa009edb25b6ee12df199e210",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "35ed74d32d8260bdfb14a94caf402bf0866bdeec",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "ba57f430328534501962d60d651e385ffd7af9ca",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "850117b637bcb1dcc14be0cf09ac819a8707b42c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "8db211aed83733073b0814adaeeab61d4521474e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "64fb0e1161ccc6b9e48b8df61f07d3c34c01ec42",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "9e4c596bfd004f447a652205163234dfd4aafa69",
        "lessThan": "57c10915f2c16c90e0d46ad00876bf39ece40fc2",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "drivers/input/rmi4/rmi_f3a.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.10"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.10",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.261",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.212",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.178",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.145",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.96",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.39",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "7.1.4",
        "versionType": "semver",
        "lessThanOrEqual": "7.1.*"
      },
      {
        "status": "unaffected",
        "version": "7.2",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "drivers/input/rmi4/rmi_f3a.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-64277

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#40986 · Revision 1
Added to Heist Feed
Publisher date
Read the original announcement