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CVE PROGRAM SOURCE RECORD7.8 High

CVE-2026-74519

pinctrl: devicetree: don't free uninitialized dev_name on error path

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Status
Published
Published
Updated
Assigning organization
Linux

Description

In the Linux kernel, the following vulnerability has been resolved: pinctrl: devicetree: don't free uninitialized dev_name on error path dt_remember_or_free_map() duplicates dev_name for each map entry. If kstrdup_const() fails, dt_free_map() frees dev_name in all num_maps entries, including entries that have not been initialized. Some pinctrl drivers, including pinctrl-imx, allocate the map with kmalloc() and leave dev_name for the core to initialize. The untouched entries therefore contain uninitialized data which is passed to kfree_const(). Reproduced on qemu's mcimx6ul-evk (pinctrl-imx) with failslab injection while binding the pinctrl-consuming device, under KASAN: BUG: KASAN: double-free in dt_free_map+0x34/0xa4 Free of addr c425a900 by task init/1 kfree from dt_free_map+0x34/0xa4 dt_free_map from dt_remember_or_free_map+0x184/0x198 dt_remember_or_free_map from pinctrl_dt_to_map+0x33c/0x4c8 pinctrl_dt_to_map from create_pinctrl+0x9c/0x5c0 Initialize all dev_name fields to NULL before duplicating the device name, making the full-map cleanup safe after a partial failure.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

Linux Linux

Default version status: unaffected

  • be4c60b563edee3712d392aaeb0943a768df7023 to < e3cfb22bad363bebcfd55d909e12d499cb8c5490affected
  • be4c60b563edee3712d392aaeb0943a768df7023 to < 1586423da2739a80871ef6240016fcb9c7339bfbaffected
  • be4c60b563edee3712d392aaeb0943a768df7023 to < dec5f0a8080502908dec5e35597c7ae07d533a3baffected
  • be4c60b563edee3712d392aaeb0943a768df7023 to < 929f6396baade89999ec8a1281232c101cbc727daffected
  • be4c60b563edee3712d392aaeb0943a768df7023 to < 321fe3584a8298386938130d138191aa35040b75affected
  • be4c60b563edee3712d392aaeb0943a768df7023 to < ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8affected
  • be4c60b563edee3712d392aaeb0943a768df7023 to < 9d00a5ac7cd3d32ae61140f4b8a62f136de84e7daffected
  • be4c60b563edee3712d392aaeb0943a768df7023 to < 015b5bcbcb622b32317642be91a7f79aa5413649affected
  • 03f69244302d7954f42f528ea2d45903ebbf59f3affected
  • 77440c3a37203e3f4667d06e37f76ef3968d2d8caffected
  • 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3affected
  • f88ac1330779c5bfdd79f7d7f7d4d3343c782f92affected
  • f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5daffected
  • 4.4.244 to < 4.5affected
  • 4.9.244 to < 4.10affected
  • 4.14.161 to < 4.15affected
  • 4.19.92 to < 4.20affected
  • 5.4.7 to < 5.5affected

Linux Linux

Default version status: affected

  • 5.5affected
  • 0 to < 5.5unaffected
  • 5.10.265 to ≤ 5.10.*unaffected
  • 5.15.216 to ≤ 5.15.*unaffected
  • 6.1.183 to ≤ 6.1.*unaffected
  • 6.6.151 to ≤ 6.6.*unaffected
  • 6.12.103 to ≤ 6.12.*unaffected
  • 6.18.44 to ≤ 6.18.*unaffected
  • 7.1.8 to ≤ 7.1.*unaffected
  • 7.2 to ≤ *unaffected

References