CVE-2026-74519High· 7.8▾ TwilightIn 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_fre…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.9 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.1%
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.
Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < e3cfb22bad363bebcfd55d909e12d499cb8c5490Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 1586423da2739a80871ef6240016fcb9c7339bfbLinux >= be4c60b563edee3712d392aaeb0943a768df7023 < dec5f0a8080502908dec5e35597c7ae07d533a3bLinux >= be4c60b563edee3712d392aaeb0943a768df7023 < 929f6396baade89999ec8a1281232c101cbc727dLinux >= be4c60b563edee3712d392aaeb0943a768df7023 < 321fe3584a8298386938130d138191aa35040b75Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 9d00a5ac7cd3d32ae61140f4b8a62f136de84e7dLinux >= be4c60b563edee3712d392aaeb0943a768df7023 < 015b5bcbcb622b32317642be91a7f79aa5413649Linux 03f69244302d7954f42f528ea2d45903ebbf59f3Linux 77440c3a37203e3f4667d06e37f76ef3968d2d8cLinux 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3Linux f88ac1330779c5bfdd79f7d7f7d4d3343c782f92Linux f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5dLinux >= 4.4.244 < 4.5Linux >= 4.9.244 < 4.10Linux >= 4.14.161 < 4.15Linux >= 4.19.92 < 4.20Linux >= 5.4.7 < 5.5Linux 5.5Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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