{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2024-50159","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","state":"PUBLISHED","assignerShortName":"Linux","dateReserved":"2024-10-21T19:36:19.961Z","datePublished":"2024-11-07T09:31:36.167Z","dateUpdated":"2026-08-05T11:42:09.468Z"},"containers":{"cna":{"providerMetadata":{"orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux","dateUpdated":"2026-08-05T11:42:09.468Z"},"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix the double free in scmi_debugfs_common_setup()\n\nClang static checker(scan-build) throws below warning：\n  |  drivers/firmware/arm_scmi/driver.c:line 2915, column 2\n  |        Attempt to free released memory.\n\nWhen devm_add_action_or_reset() fails, scmi_debugfs_common_cleanup()\nwill run twice which causes double free of 'dbg->name'.\n\nRemove the redundant scmi_debugfs_common_cleanup() to fix this problem."}],"metrics":[{"cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","baseScore":7,"baseSeverity":"HIGH"},"scenarios":[{"lang":"en","value":"AV:L - The defect lives in the `arm-scmi` platform driver's `scmi_probe()` debugfs setup path, which is only executed during local device/driver binding — there is no network, packet, or remote-peer input anywhere on the path. Reaching it requires local system context (boot, module load, or deferred-probe retry), so Local is the appropriate vector.\nAC:H - The double free is only reached when `__devres_alloc_node()` returns NULL, i.e. a small GFP_KERNEL allocation fails at one exact instant during a one-shot probe; small GFP_KERNEL allocations reclaim or OOM-kill rather than fail, and `.suppress_bind_attrs = true` removes any sysfs re-probe retry loop. The attacker cannot initiate the probe nor steer that specific allocation, so success depends on conditions genuinely outside their control, compounded by the non-default `CONFIG_ARM_SCMI_RAW_MODE_SUPPORT`/`CONFIG_ARM_SCMI_DEBUG_COUNTERS` requirement.\nPR:L - The only attacker-influenceable ingredient is system memory pressure, which an ordinary unprivileged local process can generate without any capability, and SCMI probe can occur after userspace is up via udev-driven module load or deferred-probe retry. Choosing the higher-severity option over PR:H, which would otherwise apply since deliberately initiating a probe needs CAP_SYS_MODULE.\nUI:N - Driver probe and the debugfs setup run autonomously from the DT/platform-device match; no victim must open a file, mount a filesystem, or take any other action. The error path executes purely as a consequence of the allocation failure.\nS:U - The double free corrupts the kernel's own slab allocator and dentry cache within the same kernel security authority. No hypervisor, IOMMU, container, or sandbox boundary is crossed.\nC:H - A slab double free lets the same object be handed out to two independent allocations, and the redundant `debugfs_remove_recursive()` additionally dereferences a released dentry — both are read primitives over attacker-unrelated kernel objects. Consistent with treating use-after-free/double-free as enabling arbitrary kernel memory disclosure.\nI:H - Freeing `dbg->name` and `dbg->type` twice corrupts the SLUB freelist, the standard stepping stone to aliased-object and arbitrary-write primitives, and the stale dentry is written through by the second recursive removal. Memory corruption of this class is scored as enabling control-flow hijacking.\nA:H - With freelist hardening the second `kfree()` raises a BUG/panic outright; without it, freelist corruption and the dentry use-after-free reliably lead to an oops during subsequent allocation or dcache activity. Either outcome is a full kernel crash."}]}],"affected":[{"product":"Linux","vendor":"Linux","defaultStatus":"unaffected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/arm_scmi/driver.c"],"versions":[{"version":"c3d4aed763ce4a39f8ed36c7b7cd9a6a35971329","lessThan":"6d91d07913aee90556362d648d6a28a1eda419dc","status":"affected","versionType":"git"},{"version":"c3d4aed763ce4a39f8ed36c7b7cd9a6a35971329","lessThan":"fb324fdaf546bf14bc4c17e0037bca6cb952b121","status":"affected","versionType":"git"},{"version":"c3d4aed763ce4a39f8ed36c7b7cd9a6a35971329","lessThan":"39b13dce1a91cdfc3bec9238f9e89094551bd428","status":"affected","versionType":"git"}]},{"product":"Linux","vendor":"Linux","defaultStatus":"affected","repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/firmware/arm_scmi/driver.c"],"versions":[{"version":"6.3","status":"affected"},{"version":"0","lessThan":"6.3","status":"unaffected","versionType":"semver"},{"version":"6.6.59","lessThanOrEqual":"6.6.*","status":"unaffected","versionType":"semver"},{"version":"6.11.6","lessThanOrEqual":"6.11.*","status":"unaffected","versionType":"semver"},{"version":"6.12","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":"6.3","versionEndExcluding":"6.6.59"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.11.6"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.3","versionEndExcluding":"6.12"}]}]}],"references":[{"url":"https://git.kernel.org/stable/c/6d91d07913aee90556362d648d6a28a1eda419dc"},{"url":"https://git.kernel.org/stable/c/fb324fdaf546bf14bc4c17e0037bca6cb952b121"},{"url":"https://git.kernel.org/stable/c/39b13dce1a91cdfc3bec9238f9e89094551bd428"}],"title":"firmware: arm_scmi: Fix the double free in scmi_debugfs_common_setup()","x_generator":{"engine":"bippy-1.2.0"}}}}