CVE-2022-50765
0.04%V4
2025-12-24
13h05 +00:00
13h05 +00:00
指定 CVE 通知
掌握特定 CVE 的任何變更。
CVE 描述
RISC-V: kexec: Fix memory leak of elf header buffer
In the Linux kernel, the following vulnerability has been resolved: RISC-V: kexec: Fix memory leak of elf header buffer This is reported by kmemleak detector: unreferenced object 0xff2000000403d000 (size 4096): comm "kexec", pid 146, jiffies 4294900633 (age 64.792s) hex dump (first 32 bytes): 7f 45 4c 46 02 01 01 00 00 00 00 00 00 00 00 00 .ELF............ 04 00 f3 00 01 00 00 00 00 00 00 00 00 00 00 00 ................ backtrace: [<00000000566ca97c>] kmemleak_vmalloc+0x3c/0xbe [<00000000979283d8>] __vmalloc_node_range+0x3ac/0x560 [<00000000b4b3712a>] __vmalloc_node+0x56/0x62 [<00000000854f75e2>] vzalloc+0x2c/0x34 [<00000000e9a00db9>] crash_prepare_elf64_headers+0x80/0x30c [<0000000067e8bf48>] elf_kexec_load+0x3e8/0x4ec [<0000000036548e09>] kexec_image_load_default+0x40/0x4c [<0000000079fbe1b4>] sys_kexec_file_load+0x1c4/0x322 [<0000000040c62c03>] ret_from_syscall+0x0/0x2 In elf_kexec_load(), a buffer is allocated via vzalloc() to store elf headers. While it's not freed back to system when kdump kernel is reloaded or unloaded, or when image->elf_header is successfully set and then fails to load kdump kernel for some reason. Fix it by freeing the buffer in arch_kimage_file_post_load_cleanup().CVE 資訊
EPSS
EPSS 是一種預測漏洞被利用可能性的評分模型。
EPSS 評分
EPSS 模型產生介於 0 到 1（0% 到 100%）之間的概率分數。分數越高，漏洞被利用的概率越大。
EPSS 百分位數
百分位數用於根據 EPSS 分數對 CVE 進行排名。例如，EPSS 評分在第 95 百分位的 CVE 比 95% 的其他 CVE 更有可能被利用。因此，百分位數用於比較某 CVE 的 EPSS 分數與其他 CVE 的相對位置。
