FKIE_CVE-2026-74519
Vulnerability from fkie_nvd - Published: 2026-08-15 13:17 - Updated: 2026-08-19 17:21
Severity
Summary
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.
References
Impacted products
| Vendor | Product | Version |
|---|
{
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/pinctrl/devicetree.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "e3cfb22bad363bebcfd55d909e12d499cb8c5490",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"lessThan": "1586423da2739a80871ef6240016fcb9c7339bfb",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"lessThan": "dec5f0a8080502908dec5e35597c7ae07d533a3b",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"lessThan": "929f6396baade89999ec8a1281232c101cbc727d",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"lessThan": "321fe3584a8298386938130d138191aa35040b75",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"lessThan": "ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"lessThan": "9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"lessThan": "015b5bcbcb622b32317642be91a7f79aa5413649",
"status": "affected",
"version": "be4c60b563edee3712d392aaeb0943a768df7023",
"versionType": "git"
},
{
"status": "affected",
"version": "03f69244302d7954f42f528ea2d45903ebbf59f3",
"versionType": "git"
},
{
"status": "affected",
"version": "77440c3a37203e3f4667d06e37f76ef3968d2d8c",
"versionType": "git"
},
{
"status": "affected",
"version": "679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3",
"versionType": "git"
},
{
"status": "affected",
"version": "f88ac1330779c5bfdd79f7d7f7d4d3343c782f92",
"versionType": "git"
},
{
"status": "affected",
"version": "f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d",
"versionType": "git"
},
{
"lessThan": "4.5",
"status": "affected",
"version": "4.4.244",
"versionType": "semver"
},
{
"lessThan": "4.10",
"status": "affected",
"version": "4.9.244",
"versionType": "semver"
},
{
"lessThan": "4.15",
"status": "affected",
"version": "4.14.161",
"versionType": "semver"
},
{
"lessThan": "4.20",
"status": "affected",
"version": "4.19.92",
"versionType": "semver"
},
{
"lessThan": "5.5",
"status": "affected",
"version": "5.4.7",
"versionType": "semver"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/pinctrl/devicetree.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "5.5"
},
{
"lessThan": "5.5",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.151",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.103",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.44",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.8",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: devicetree: don\u0027t 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\u0027s 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."
}
],
"id": "CVE-2026-74519",
"lastModified": "2026-08-19T17:21:08.707",
"metrics": {
"cvssMetricV31": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "LOCAL",
"availabilityImpact": "HIGH",
"baseScore": 7.8,
"baseSeverity": "HIGH",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "LOW",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"exploitabilityScore": 1.8,
"impactScore": 5.9,
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary"
}
]
},
"published": "2026-08-15T13:17:57.083",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/015b5bcbcb622b32317642be91a7f79aa5413649"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/1586423da2739a80871ef6240016fcb9c7339bfb"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/321fe3584a8298386938130d138191aa35040b75"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/929f6396baade89999ec8a1281232c101cbc727d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/dec5f0a8080502908dec5e35597c7ae07d533a3b"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/e3cfb22bad363bebcfd55d909e12d499cb8c5490"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Received"
}
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