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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        {
          "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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            "baseSeverity": "HIGH",
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            "version": "3.1"
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            {
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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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        {
          "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"
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          "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": "2026-09-24",
      "epss": "0.00199",
      "percentile": "0.08576"
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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",
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                  },
                  {
                    "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"
      }
    },
    "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": "2026-09-23T00:17:41Z",
      "cve": "CVE-2026-74519",
      "id": "CVE-2026-74519",
      "initial_release_date": "2026-08-15T23:51:07Z",
      "product_status:known_affected": "605",
      "product_status:known_not_affected": "97",
      "product_status:recommended": "23",
      "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": "7"
    }
  }
}



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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

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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.
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  • 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.



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.