{"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"}}}}