CVE-2026-74519 (GCVE-0-2026-74519)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:38
VLAI
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)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted 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)
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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)
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          "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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            "baseSeverity": "HIGH",
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            "version": "3.1"
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              "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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        "dateUpdated": "2026-08-19T16:38:21.855Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
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      "references": [
        {
          "url": "https://git.kernel.org/stable/c/e3cfb22bad363bebcfd55d909e12d499cb8c5490"
        },
        {
          "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"
        },
        {
          "url": "https://git.kernel.org/stable/c/321fe3584a8298386938130d138191aa35040b75"
        },
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          "url": "https://git.kernel.org/stable/c/ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8"
        },
        {
          "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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    "assignerShortName": "Linux",
    "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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      "cve": "CVE-2026-74519",
      "date": "2026-08-24",
      "epss": "0.00146",
      "percentile": "0.04086"
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      "current_release_date": "2026-08-23T15:03:58.000Z",
      "cve": "CVE-2026-74519",
      "id": "msrc_CVE-2026-74519",
      "initial_release_date": "2026-08-23T15:03:58.000Z",
      "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": "1"
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    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74519\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T13:17:57.083\",\"lastModified\":\"2026-08-19T17:21:08.707\",\"vulnStatus\":\"Received\",\"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.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/pinctrl/devicetree.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"e3cfb22bad363bebcfd55d909e12d499cb8c5490\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"1586423da2739a80871ef6240016fcb9c7339bfb\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"dec5f0a8080502908dec5e35597c7ae07d533a3b\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"929f6396baade89999ec8a1281232c101cbc727d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"321fe3584a8298386938130d138191aa35040b75\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"be4c60b563edee3712d392aaeb0943a768df7023\",\"lessThan\":\"015b5bcbcb622b32317642be91a7f79aa5413649\",\"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\",\"status\":\"affected\"},{\"version\":\"4.4.244\",\"lessThan\":\"4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.9.244\",\"lessThan\":\"4.10\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.14.161\",\"lessThan\":\"4.15\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"4.19.92\",\"lessThan\":\"4.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"5.4.7\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/pinctrl/devicetree.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.5\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.5\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.151\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.103\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.44\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.8\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "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"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-21T00:40:25Z",
      "cve": "CVE-2026-74519",
      "id": "CVE-2026-74519",
      "initial_release_date": "2026-08-15T23:51:07Z",
      "product_status:known_affected": "181",
      "product_status:known_not_affected": "103",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-74519",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-74519.json",
      "version": "4"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.