{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2024-53193", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2024-11-19T17:17:25.014Z", "datePublished": "2024-12-27T13:49:35.566Z", "dateUpdated": "2026-08-05T11:44:33.733Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T11:44:33.733Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nclk: clk-loongson2: Fix memory corruption bug in struct loongson2_clk_provider\n\nSome heap space is allocated for the flexible structure `struct\nclk_hw_onecell_data` and its flexible-array member `hws` through\nthe composite structure `struct loongson2_clk_provider` in function\n`loongson2_clk_probe()`, as shown below:\n\n289 struct loongson2_clk_provider *clp;\n\t...\n296 for (p = data; p->name; p++)\n297 clks_num++;\n298\n299 clp = devm_kzalloc(dev, struct_size(clp, clk_data.hws, clks_num),\n300 GFP_KERNEL);\n\nThen some data is written into the flexible array:\n\n350 clp->clk_data.hws[p->id] = hw;\n\nThis corrupts `clk_lock`, which is the spinlock variable immediately\nfollowing the `clk_data` member in `struct loongson2_clk_provider`:\n\nstruct loongson2_clk_provider {\n\tvoid __iomem *base;\n\tstruct device *dev;\n\tstruct clk_hw_onecell_data clk_data;\n\tspinlock_t clk_lock;\t/* protect access to DIV registers */\n};\n\nThe problem is that the flexible structure is currently placed in the\nmiddle of `struct loongson2_clk_provider` instead of at the end.\n\nFix this by moving `struct clk_hw_onecell_data clk_data;` to the end of\n`struct loongson2_clk_provider`. Also, add a code comment to help\nprevent this from happening again in case new members are added to the\nstructure in the future.\n\nThis change also fixes the following -Wflex-array-member-not-at-end\nwarning:\n\ndrivers/clk/clk-loongson2.c:32:36: warning: structure containing a flexible array member is not at the end of another structure [-Wflex-array-member-not-at-end]" } ], "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 flaw is in a SoC platform clock-controller driver bound from device tree; there is no network or adjacent-network path, and the corrupted lock is only exercised through local clock consumers (DRM modeset ioctl, cpufreq, gate enable) on the affected Loongson-2K board.\nAC:L - The overlap between `clk_data.hws[]` and `clk_lock` is a deterministic consequence of the struct layout and occurs on every boot of an affected board with no race to win and no memory-layout grooming required; reaching the corrupted lock afterwards is a normal, repeatable operation.\nPR:L - The corruption itself is established at boot with no privileges at all, and an ordinary unprivileged local user can then drive code that acquires the clobbered spinlock (e.g. a modeset on the display controller's pix0/pix1 divider clocks via /dev/dri/card*), so no administrative capability is needed.\nUI:N - The memory corruption happens automatically during driver probe at boot, and triggering its effect requires only the attacker's own actions — no victim must open a file, mount a filesystem, or otherwise cooperate.\nS:U - Both the corrupted memory and the resulting impact are entirely within the kernel's own security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - Kernel heap pointers (`struct clk_hw *`) are written into the spinlock's debug/lockdep fields where they are leaked to dmesg via spin_dump()/lockdep splats, and conversely the raw lock bytes are returned to consumers as a `struct clk_hw *` through `of_clk_hw_onecell_get()` index 0, giving a type-confused pointer the clk core dereferences for reads.\nI:H - This is a genuine memory-corruption primitive in both directions: clk_hw pointers overwrite live spinlock/lockdep state, and every subsequent lock acquire/release writes into what the clk framework treats as its `hws[]` pointer array, with the lockdep path further using a corrupted `lock_class` pointer for indexed writes.\nA:H - A clobbered spinlock leaves it permanently appearing held, so the first `spin_lock_irqsave()` from a divider set_rate or gate enable spins forever with interrupts disabled (hard lockup), and on debug/lockdep or PREEMPT_RT kernels the corrupted lock internals cause an immediate wild-pointer oops." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/clk/clk-loongson2.c" ], "versions": [ { "version": "9796ec0bd04bb0e70487127d44949ca0554df5d3", "lessThan": "76918202615f2ba7deda14901d9fff528a180099", "status": "affected", "versionType": "git" }, { "version": "9796ec0bd04bb0e70487127d44949ca0554df5d3", "lessThan": "145de18065b9840687d9b4e63746238c1da25d22", "status": "affected", "versionType": "git" }, { "version": "9796ec0bd04bb0e70487127d44949ca0554df5d3", "lessThan": "6e4bf018bb040955da53dae9f8628ef8fcec2dbe", "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/clk/clk-loongson2.c" ], "versions": [ { "version": "6.10", "status": "affected" }, { "version": "0", "lessThan": "6.10", "status": "unaffected", "versionType": "semver" }, { "version": "6.11.11", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.2", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.13", "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": "6.10", "versionEndExcluding": "6.11.11" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.12.2" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.10", "versionEndExcluding": "6.13" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/76918202615f2ba7deda14901d9fff528a180099" }, { "url": "https://git.kernel.org/stable/c/145de18065b9840687d9b4e63746238c1da25d22" }, { "url": "https://git.kernel.org/stable/c/6e4bf018bb040955da53dae9f8628ef8fcec2dbe" } ], "title": "clk: clk-loongson2: Fix memory corruption bug in struct loongson2_clk_provider", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "cvssV3_1": { "scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH" } }, { "other": { "type": "ssvc", "content": { "id": "CVE-2024-53193", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "no" }, { "Technical Impact": "total" } ], "version": "2.0.3", "timestamp": "2025-10-01T20:04:04.188198Z" } } } ], "problemTypes": [ { "descriptions": [ { "lang": "en", "type": "CWE", "cweId": "CWE-787", "description": "CWE-787 Out-of-bounds Write" } ] } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:07:20.819Z" } } ] } }