{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-74519", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-15T05:44:03.910Z", "datePublished": "2026-08-15T12:27:38.101Z", "dateUpdated": "2026-08-19T16:38:21.855Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-19T16:38:21.855Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\npinctrl: devicetree: don't 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's 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." } ], "metrics": [ { "cvssV3_1": { "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" }, "scenarios": [ { "lang": "en", "value": "AV:L - The bug is reached only through local device driver probe/binding (really_probe -> pinctrl_bind_pins -> devm_pinctrl_get -> create_pinctrl -> pinctrl_dt_to_map -> 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": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/pinctrl/devicetree.c" ], "versions": [ { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "e3cfb22bad363bebcfd55d909e12d499cb8c5490", "status": "affected", "versionType": "git" }, { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "1586423da2739a80871ef6240016fcb9c7339bfb", "status": "affected", "versionType": "git" }, { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "dec5f0a8080502908dec5e35597c7ae07d533a3b", "status": "affected", "versionType": "git" }, { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "929f6396baade89999ec8a1281232c101cbc727d", "status": "affected", "versionType": "git" }, { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "321fe3584a8298386938130d138191aa35040b75", "status": "affected", "versionType": "git" }, { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "ad0ad3c228b6f76fde10f32047e0ec5fbc109dc8", "status": "affected", "versionType": "git" }, { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "9d00a5ac7cd3d32ae61140f4b8a62f136de84e7d", "status": "affected", "versionType": "git" }, { "version": "be4c60b563edee3712d392aaeb0943a768df7023", "lessThan": "015b5bcbcb622b32317642be91a7f79aa5413649", "status": "affected", "versionType": "git" }, { "version": "03f69244302d7954f42f528ea2d45903ebbf59f3", "status": "affected", "versionType": "git" }, { "version": "77440c3a37203e3f4667d06e37f76ef3968d2d8c", "status": "affected", "versionType": "git" }, { "version": "679c4f27b8958b65bb51d1c3dfdbf3befe4a33a3", "status": "affected", "versionType": "git" }, { "version": "f88ac1330779c5bfdd79f7d7f7d4d3343c782f92", "status": "affected", "versionType": "git" }, { "version": "f739a699db7d5a5cf39ca3ce2c84e4fe4a8f4c5d", "status": "affected", "versionType": "git" }, { "version": "4.4.244", "lessThan": "4.5", "status": "affected", "versionType": "semver" }, { "version": "4.9.244", "lessThan": "4.10", "status": "affected", "versionType": "semver" }, { "version": "4.14.161", "lessThan": "4.15", "status": "affected", "versionType": "semver" }, { "version": "4.19.92", "lessThan": "4.20", "status": "affected", "versionType": "semver" }, { "version": "5.4.7", "lessThan": "5.5", "status": "affected", "versionType": "semver" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/pinctrl/devicetree.c" ], "versions": [ { "version": "5.5", "status": "affected" }, { "version": "0", "lessThan": "5.5", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.265", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.216", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.183", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.151", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.103", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.44", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.8", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.10.265" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "5.15.216" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.1.183" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.6.151" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.12.103" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "6.18.44" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.1.8" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.5", "versionEndExcluding": "7.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.4.244" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.9.244" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.14.161" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.19.92" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "5.4.7" } ] } ] } ], "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" } ], "title": "pinctrl: devicetree: don't free uninitialized dev_name on error path", "x_generator": { "engine": "bippy-1.2.0" } } } }