CVE-2026-74519 (GCVE-0-2026-74519)
Vulnerability from cvelistv5
Published
2026-08-15 12:27
Modified
2026-10-16 19:05
Severity ?
7.8 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
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
Linux Linux Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: be4c60b563edee3712d392aaeb0943a768df7023
Version: 03f69244302d7954f42f528ea2d45903ebbf59f3
Version: 77440c3a37203e3f4667d06e37f76ef3968d2d8c
Version: 679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3
Version: f88ac1330779c5bfdd79f7d7f7d4d3343c782f92
Version: f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d
Version: 4.4.244   ≤
Version: 4.9.244   ≤
Version: 4.14.161   ≤
Version: 4.19.92   ≤
Version: 5.4.7   ≤
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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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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "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"
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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"
        },
        {
          "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/015b5bcbcb622b32317642be91a7f79aa5413649"
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      ],
      "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": "2026-10-16T19:05:52.543Z",
    "state": "PUBLISHED"
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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.\"}]}], \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": 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{\"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\"}], \"programFiles\": [\"drivers/pinctrl/devicetree.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"5.5\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"5.5\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"5.10.265\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.216\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.183\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.151\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.12.103\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.12.*\"}, {\"status\": \"unaffected\", \"version\": \"6.18.44\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.18.*\"}, {\"status\": \"unaffected\", \"version\": \"7.1.8\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"7.1.*\"}, {\"status\": \"unaffected\", \"version\": \"7.2\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/pinctrl/devicetree.c\"], \"defaultStatus\": \"affected\"}], \"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\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"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.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.265\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.216\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.183\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.151\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.12.103\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.18.44\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.1.8\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"7.2\", \"versionStartIncluding\": \"5.5\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.4.244\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.9.244\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.14.161\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"4.19.92\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionStartIncluding\": \"5.4.7\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-08-19T16:38:21.855Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-74519\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-10-16T19:05:52.543Z\", \"dateReserved\": \"2026-08-15T05:44:03.910Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2026-08-15T12:27:38.101Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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