| From bippy-7c5fe7eed585 Mon Sep 17 00:00:00 2001 |
| From: Greg Kroah-Hartman <gregkh@linuxfoundation.org> |
| To: <linux-cve-announce@vger.kernel.org> |
| Reply-to: <cve@kernel.org>, <linux-kernel@vger.kernel.org> |
| Subject: CVE-2025-21950: drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl |
| |
| Description |
| =========== |
| |
| In the Linux kernel, the following vulnerability has been resolved: |
| |
| drivers: virt: acrn: hsm: Use kzalloc to avoid info leak in pmcmd_ioctl |
| |
| In the "pmcmd_ioctl" function, three memory objects allocated by |
| kmalloc are initialized by "hcall_get_cpu_state", which are then |
| copied to user space. The initializer is indeed implemented in |
| "acrn_hypercall2" (arch/x86/include/asm/acrn.h). There is a risk of |
| information leakage due to uninitialized bytes. |
| |
| The Linux kernel CVE team has assigned CVE-2025-21950 to this issue. |
| |
| |
| Affected and fixed versions |
| =========================== |
| |
| Issue introduced in 5.12 with commit 3d679d5aec648f50e645702929890b9611998a0b and fixed in 5.15.179 with commit 4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120 |
| Issue introduced in 5.12 with commit 3d679d5aec648f50e645702929890b9611998a0b and fixed in 6.1.131 with commit 524f29d78c9bdeb49f31f5b0376a07d2fc5cf563 |
| Issue introduced in 5.12 with commit 3d679d5aec648f50e645702929890b9611998a0b and fixed in 6.6.83 with commit d7e5031fe3f161c8eb5e84db1540bc4373ed861b |
| Issue introduced in 5.12 with commit 3d679d5aec648f50e645702929890b9611998a0b and fixed in 6.12.19 with commit 1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083 |
| Issue introduced in 5.12 with commit 3d679d5aec648f50e645702929890b9611998a0b and fixed in 6.13.7 with commit a4c21b878f0e237f45209a324c903ea7fb05247d |
| Issue introduced in 5.12 with commit 3d679d5aec648f50e645702929890b9611998a0b and fixed in 6.14 with commit 819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb |
| |
| Please see https://www.kernel.org for a full list of currently supported |
| kernel versions by the kernel community. |
| |
| Unaffected versions might change over time as fixes are backported to |
| older supported kernel versions. The official CVE entry at |
| https://cve.org/CVERecord/?id=CVE-2025-21950 |
| will be updated if fixes are backported, please check that for the most |
| up to date information about this issue. |
| |
| |
| Affected files |
| ============== |
| |
| The file(s) affected by this issue are: |
| drivers/virt/acrn/hsm.c |
| |
| |
| Mitigation |
| ========== |
| |
| The Linux kernel CVE team recommends that you update to the latest |
| stable kernel version for this, and many other bugfixes. Individual |
| changes are never tested alone, but rather are part of a larger kernel |
| release. Cherry-picking individual commits is not recommended or |
| supported by the Linux kernel community at all. If however, updating to |
| the latest release is impossible, the individual changes to resolve this |
| issue can be found at these commits: |
| https://git.kernel.org/stable/c/4e15cf870d2c748e45d45ffc4d5b1dc1b7d50120 |
| https://git.kernel.org/stable/c/524f29d78c9bdeb49f31f5b0376a07d2fc5cf563 |
| https://git.kernel.org/stable/c/d7e5031fe3f161c8eb5e84db1540bc4373ed861b |
| https://git.kernel.org/stable/c/1b8f7a2caa7f9cdfd135e3f78eb9d7e36fb95083 |
| https://git.kernel.org/stable/c/a4c21b878f0e237f45209a324c903ea7fb05247d |
| https://git.kernel.org/stable/c/819cec1dc47cdeac8f5dd6ba81c1dbee2a68c3bb |
