{"id":"CVE-2026-74519","title":"pinctrl: devicetree: don't free uninitialized dev_name on error path","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: devicetree: don't free uninitialized dev_name on error path\n\ndt_remember_or_free_map() duplicates dev_name for each map entry. If\nkstrdup_const() fails, dt_fre…","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","cvssSource":"cna","vendor":"Linux","product":"Linux","affected":["Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < e3cfb22bad363bebcfd55d909e12d499cb8c5490","Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 1586423da2739a80871ef6240016fcb9c7339bfb","Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < dec5f0a8080502908dec5e35597c7ae07d533a3b","Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 929f6396baade89999ec8a1281232c101cbc727d","Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 321fe3584a8298386938130d138191aa35040b75","Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8","Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d","Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 015b5bcbcb622b32317642be91a7f79aa5413649","Linux 03f69244302d7954f42f528ea2d45903ebbf59f3","Linux 77440c3a37203e3f4667d06e37f76ef3968d2d8c","Linux 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3","Linux f88ac1330779c5bfdd79f7d7f7d4d3343c782f92","Linux f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d","Linux >= 4.4.244 < 4.5","Linux >= 4.9.244 < 4.10","Linux >= 4.14.161 < 4.15","Linux >= 4.19.92 < 4.20","Linux >= 5.4.7 < 5.5","Linux 5.5"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-10-16T18:58:57.723333Z"},"published":"2026-08-15","updated":"2026-10-16","sourceUpdated":"2026-10-16T19:05:52.543Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-74519","references":[{"url":"https://git.kernel.org/stable/c/e3cfb22bad363bebcfd55d909e12d499cb8c5490"},{"url":"https://git.kernel.org/stable/c/1586423da2739a80871ef6240016fcb9c7339bfb"},{"url":"https://git.kernel.org/stable/c/dec5f0a8080502908dec5e35597c7ae07d533a3b"},{"url":"https://git.kernel.org/stable/c/929f6396baade89999ec8a1281232c101cbc727d"},{"url":"https://git.kernel.org/stable/c/321fe3584a8298386938130d138191aa35040b75"},{"url":"https://git.kernel.org/stable/c/ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8"},{"url":"https://git.kernel.org/stable/c/9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d"},{"url":"https://git.kernel.org/stable/c/015b5bcbcb622b32317642be91a7f79aa5413649"}],"tags":["cve.org"],"epss":0.00146,"epssPercentile":0.03429,"ingestedAt":"2026-10-16T19:46:24.349Z","slug":"CVE-2026-74519","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: devicetree: don't free uninitialized dev_name on error path\n\ndt_remember_or_free_map() duplicates dev_name for each map entry. If\nkstrdup_const() fails, dt_free_map() frees dev_name in all num_maps\nentries, including entries that have not been initialized.\n\nSome pinctrl drivers, including pinctrl-imx, allocate the map with\nkmalloc() and leave dev_name for the core to initialize. The untouched\nentries therefore contain uninitialized data which is passed to\nkfree_const().\n\nReproduced on qemu's mcimx6ul-evk (pinctrl-imx) with failslab injection\nwhile binding the pinctrl-consuming device, under KASAN:\n\n  BUG: KASAN: double-free in dt_free_map+0x34/0xa4\n  Free of addr c425a900 by task init/1\n   kfree from dt_free_map+0x34/0xa4\n   dt_free_map from dt_remember_or_free_map+0x184/0x198\n   dt_remember_or_free_map from pinctrl_dt_to_map+0x33c/0x4c8\n   pinctrl_dt_to_map from create_pinctrl+0x9c/0x5c0\n\nInitialize all dev_name fields to NULL before duplicating the device\nname, making the full-map cleanup safe after a partial failure.\n\n## Affected\n\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < e3cfb22bad363bebcfd55d909e12d499cb8c5490`\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 1586423da2739a80871ef6240016fcb9c7339bfb`\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < dec5f0a8080502908dec5e35597c7ae07d533a3b`\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 929f6396baade89999ec8a1281232c101cbc727d`\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 321fe3584a8298386938130d138191aa35040b75`\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8`\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d`\n- `Linux >= be4c60b563edee3712d392aaeb0943a768df7023 < 015b5bcbcb622b32317642be91a7f79aa5413649`\n- `Linux 03f69244302d7954f42f528ea2d45903ebbf59f3`\n- `Linux 77440c3a37203e3f4667d06e37f76ef3968d2d8c`\n- `Linux 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3`\n- `Linux f88ac1330779c5bfdd79f7d7f7d4d3343c782f92`\n- `Linux f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d`\n- `Linux >= 4.4.244 < 4.5`\n- `Linux >= 4.9.244 < 4.10`\n- `Linux >= 4.14.161 < 4.15`\n- `Linux >= 4.19.92 < 4.20`\n- `Linux >= 5.4.7 < 5.5`\n- `Linux 5.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":43,"depthScoreParts":{"impact":42.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}