{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-57985", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-02-27T02:04:28.913Z", "datePublished": "2025-02-27T02:07:09.983Z", "dateUpdated": "2026-08-05T11:47:11.635Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:47:11.635Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: qcom: scm: Cleanup global '__scm' on probe failures\n\nIf SCM driver fails the probe, it should not leave global '__scm'\nvariable assigned, because external users of this driver will assume the\nprobe finished successfully. For example TZMEM parts ('__scm->mempool')\nare initialized later in the probe, but users of it (__scm_smc_call())\nrely on the '__scm' variable.\n\nThis fixes theoretical NULL pointer exception, triggered via introducing\nprobe deferral in SCM driver with call trace:\n\n qcom_tzmem_alloc+0x70/0x1ac (P)\n qcom_tzmem_alloc+0x64/0x1ac (L)\n qcom_scm_assign_mem+0x78/0x194\n qcom_rmtfs_mem_probe+0x2d4/0x38c\n platform_probe+0x68/0xc8" } ], "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 Qualcomm SCM driver is a platform firmware interface (SMC calls to TrustZone) with no network-facing surface; reaching the stale `__scm` requires local access to a consumer entry point such as the msm DRM render node or `/dev/fastrpc-*`.\nAC:H - The vulnerable state only exists if `qcom_scm_probe()` fails or defers after publishing `__scm` — a boot-time device-tree/driver-ordering condition the attacker cannot induce, and `suppress_bind_attrs = true` plus `subsys_initcall` registration removes any bind/unbind or module-reload path to force a re-probe.\nPR:L - Once the dangling `__scm` exists, an ordinary unprivileged local user can reach it — the a6xx zap-shader load path (`adreno_zap_shader_load()` from `a6xx_gpu.c:995`) is driven by GPU init on the msm render node, which unprivileged apps hold on Android, and `fastrpc` exposes another unprivileged device node.\nUI:N - No victim action is required; the stale pointer is consumed automatically by subsequent driver probes at boot or by the attacker's own GPU/fastrpc activity.\nS:U - The freed object, the dereferences, and any resulting corruption are all within the kernel's own security authority, with no crossing into a hypervisor, IOMMU, or other domain.\nC:H - This is a use-after-free of a `devm_kzalloc()`'d `struct qcom_scm` released by `devres_release_all()`; consumers read `mempool`, `dev`, and clk/icc pointers out of the reallocated slab object and use them as pointers, which per UAF scoring can be leveraged into arbitrary kernel memory disclosure.\nI:H - Controlling the reallocated object gives control of `__scm->mempool` (fed to `gen_pool_alloc()`) and `__scm->core_clk`/`__scm->path` (consumed by `clk_enable()`/`icc_set_bw()`, which chase `ops` function pointers), providing heap-spray-based write and control-flow-hijack primitives.\nA:H - The documented outcome is a kernel oops — a NULL/invalid dereference in `qcom_tzmem_alloc()` via `qcom_scm_assign_mem()` — and use-after-frees reliably panic the kernel even when not weaponized." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/firmware/qcom/qcom_scm.c" ], "versions": [ { "version": "40289e35ca525f29a03989352ab207b6a9675475", "lessThan": "390d3baeba51a126f75c97b90ec28b9384ce4b84", "status": "affected", "versionType": "git" }, { "version": "40289e35ca525f29a03989352ab207b6a9675475", "lessThan": "faf1715798fe72b79e4432ce8c6d03ca69765425", "status": "affected", "versionType": "git" }, { "version": "40289e35ca525f29a03989352ab207b6a9675475", "lessThan": "1e76b546e6fca7eb568161f408133904ca6bcf4f", "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/qcom/qcom_scm.c" ], "versions": [ { "version": "6.11", "status": "affected" }, { "version": "0", "lessThan": "6.11", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.13", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13.2", "lessThanOrEqual": "6.13.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.14", "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": "6.11", "versionEndExcluding": "6.12.13" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.13.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.11", "versionEndExcluding": "6.14" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/390d3baeba51a126f75c97b90ec28b9384ce4b84" }, { "url": "https://git.kernel.org/stable/c/faf1715798fe72b79e4432ce8c6d03ca69765425" }, { "url": "https://git.kernel.org/stable/c/1e76b546e6fca7eb568161f408133904ca6bcf4f" } ], "title": "firmware: qcom: scm: Cleanup global '__scm' on probe failures", "x_generator": { "engine": "bippy-1.2.0" } } } }