CVE-2026-74519 (GCVE-0-2026-74519)
Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:38
VLAI
EPSS
VEX
Title
pinctrl: devicetree: don't free uninitialized dev_name on error path
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.
Severity
7.8 (High)
Assigner
References
8 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
be4c60b563edee3712d392aaeb0943a768df7023 , < e3cfb22bad363bebcfd55d909e12d499cb8c5490
(git)
Affected: be4c60b563edee3712d392aaeb0943a768df7023 , < 1586423da2739a80871ef6240016fcb9c7339bfb (git) Affected: be4c60b563edee3712d392aaeb0943a768df7023 , < dec5f0a8080502908dec5e35597c7ae07d533a3b (git) Affected: be4c60b563edee3712d392aaeb0943a768df7023 , < 929f6396baade89999ec8a1281232c101cbc727d (git) Affected: be4c60b563edee3712d392aaeb0943a768df7023 , < 321fe3584a8298386938130d138191aa35040b75 (git) Affected: be4c60b563edee3712d392aaeb0943a768df7023 , < ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8 (git) Affected: be4c60b563edee3712d392aaeb0943a768df7023 , < 9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d (git) Affected: be4c60b563edee3712d392aaeb0943a768df7023 , < 015b5bcbcb622b32317642be91a7f79aa5413649 (git) Affected: 03f69244302d7954f42f528ea2d45903ebbf59f3 (git) Affected: 77440c3a37203e3f4667d06e37f76ef3968d2d8c (git) Affected: 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3 (git) Affected: f88ac1330779c5bfdd79f7d7f7d4d3343c782f92 (git) Affected: f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d (git) Affected: 4.4.244 , < 4.5 (semver) Affected: 4.9.244 , < 4.10 (semver) Affected: 4.14.161 , < 4.15 (semver) Affected: 4.19.92 , < 4.20 (semver) Affected: 5.4.7 , < 5.5 (semver) |
guessed | |
| Linux | Linux |
Affected:
5.5
Unaffected: 0 , < 5.5 (semver) Unaffected: 5.10.265 , ≤ 5.10.* (semver) Unaffected: 5.15.216 , ≤ 5.15.* (semver) Unaffected: 6.1.183 , ≤ 6.1.* (semver) Unaffected: 6.6.151 , ≤ 6.6.* (semver) Unaffected: 6.12.103 , ≤ 6.12.* (semver) Unaffected: 6.18.44 , ≤ 6.18.* (semver) Unaffected: 7.1.8 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
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"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."
}
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"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
"version": "3.1"
},
"scenarios": [
{
"lang": "en",
"value": "AV:L - The bug is reached only through local device driver probe/binding (really_probe -\u003e pinctrl_bind_pins -\u003e devm_pinctrl_get -\u003e create_pinctrl -\u003e pinctrl_dt_to_map -\u003e dt_remember_or_free_map); no network, Bluetooth, or remote protocol handler is on this path.\nAC:L - Once a pinctrl-consuming imx/sunxi device probes or re-probes, an attacker can reliably force kstrdup_const() to fail with sustained memory pressure; the partial-init error path then deterministically calls dt_free_map() on all entries, as confirmed by failslab/KASAN reproduction.\nPR:L - A local unprivileged account suffices to exhaust kernel memory during probe or deferred-probe retry; no CAP_SYS_ADMIN, module load, or DT overlay is strictly required beyond having affected OF hardware that binds pinctrl at boot or on automatic reprobe.\nUI:N - Exploitation executes autonomously during kernel driver initialization when allocation fails; no victim mount, file open, or other interactive action is needed.\nS:U - Double-free and heap corruption remain within kernel slab memory in the same security authority; this is a standard local kernel compromise path without VM escape, IOMMU bypass, or sandbox boundary crossing.\nC:H - kfree_const() on uninitialized kmalloc map[i].dev_name values causes invalid or duplicate frees; KASAN reports double-free, and corrupted freelist/overlapping slab objects can be groomed into arbitrary kernel memory disclosure.\nI:H - Double-free and invalid kfree corrupt the SLUB freelist; attacker-controlled heap grooming can yield overlapping allocations and write primitives enabling control-flow hijack and arbitrary kernel code execution.\nA:H - KASAN-confirmed double-free in dt_free_map during device bind causes kernel oops/panic; even without full exploitation the invalid kmem_cache_free reliably crashes the system on affected embedded imx/sunxi platforms."
}
]
}
],
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"references": [
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"url": "https://git.kernel.org/stable/c/e3cfb22bad363bebcfd55d909e12d499cb8c5490"
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{
"url": "https://git.kernel.org/stable/c/1586423da2739a80871ef6240016fcb9c7339bfb"
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{
"url": "https://git.kernel.org/stable/c/dec5f0a8080502908dec5e35597c7ae07d533a3b"
},
{
"url": "https://git.kernel.org/stable/c/929f6396baade89999ec8a1281232c101cbc727d"
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{
"url": "https://git.kernel.org/stable/c/321fe3584a8298386938130d138191aa35040b75"
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{
"url": "https://git.kernel.org/stable/c/ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8"
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{
"url": "https://git.kernel.org/stable/c/9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d"
},
{
"url": "https://git.kernel.org/stable/c/015b5bcbcb622b32317642be91a7f79aa5413649"
}
],
"title": "pinctrl: devicetree: don\u0027t free uninitialized dev_name on error path",
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"cveId": "CVE-2026-74519",
"datePublished": "2026-08-15T12:27:38.101Z",
"dateReserved": "2026-08-15T05:44:03.910Z",
"dateUpdated": "2026-08-19T16:38:21.855Z",
"state": "PUBLISHED"
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"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2026-74519",
"date": "2026-10-14",
"epss": "0.00146",
"percentile": "0.03408"
},
"microsoft_vex": {
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"cve": "CVE-2026-74519",
"id": "msrc_CVE-2026-74519",
"initial_release_date": "2026-08-23T15:03:58.000Z",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"source": "Microsoft CSAF VEX",
"status": "final",
"title": "pinctrl: devicetree: don\u0027t free uninitialized dev_name on error path",
"url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74519.json",
"version": "3"
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],
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"vendor": "Linux",
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"status": "affected",
"version": "5.5"
},
{
"lessThan": "5.5",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.265",
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{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.216",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.183",
"versionType": "semver"
},
{
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"status": "unaffected",
"version": "6.6.151",
"versionType": "semver"
},
{
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"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"
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],
"cveTags": [],
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{
"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"
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2026-08-17T15:00:56+00:00",
"cve": "CVE-2026-74519",
"id": "CVE-2026-74519",
"initial_release_date": "2026-08-15T00:00:00+00:00",
"product_status:known_affected": "260",
"product_status:known_not_affected": "14",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: pinctrl: devicetree: don\u0027t free uninitialized dev_name on error path",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74519.json",
"version": "3"
}
}
}
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Sightings
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Nomenclature
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.