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DEBIAN-CVE-2024-53193
No affected components available
In the Linux kernel, the following vulnerability has been resolved: clk: clk-loongson2: Fix memory corruption bug in struct loongson2_clk_provider Some heap space is allocated for the flexible structure struct clk_hw_onecell_data and its flexible-array member hws through the composite structure struct loongson2_clk_provider in function loongson2_clk_probe(), as shown below: 289 struct loongson2_clk_provider *clp; ... 296 for (p = data; p->name; p++) 297 clks_num++; 298 299 clp = devm_kzalloc(dev, struct_size(clp, clk_data.hws, clks_num), 300 GFP_KERNEL); Then some data is written into the flexible array: 350 clp->clk_data.hws[p->id] = hw; This corrupts clk_lock, which is the spinlock variable immediately following the clk_data member in struct loongson2_clk_provider: struct loongson2_clk_provider { void __iomem *base; struct device dev; struct clk_hw_onecell_data clk_data; spinlock_t clk_lock; / protect access to DIV registers */ }; The problem is that the flexible structure is currently placed in the middle of struct loongson2_clk_provider instead of at the end. Fix this by moving struct clk_hw_onecell_data clk_data; to the end of struct loongson2_clk_provider. Also, add a code comment to help prevent this from happening again in case new members are added to the structure in the future. This change also fixes the following -Wflex-array-member-not-at-end warning: drivers/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]
The vulnerability requires local access to the device to be exploited. It is easy for an attacker to exploit this vulnerability. An attacker needs basic access or low-level privileges. No user interaction is needed for the attacker to exploit this vulnerability. The impact is confined to the system where the vulnerability exists. There is a high impact on the confidentiality of the information. There is a high impact on the integrity of the data. There is a high impact on the availability of the system.
Exploitation activity has been observed. Apply available patches or mitigations urgently.
Probability that this vulnerability will be exploited in the wild within the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
- CVE-2024-53193Upstream
- EUVD-2024-51865Upstream
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