Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - drm防止 drm_copy_field() 嘗試複製 NULL 指標。由於 drm_copy_field() 嘗試透過 DRM_IOCTL_VERSION 將某些 drm_driver 結構欄位複製到使用者空間因此驅動程式需要某些結構欄位。但也有可能是驅動程式具有錯誤且未設定某些欄位進而導致 drm_copy_field() 嘗試複製 NULL 指標[ +10.395966] 無法處理在 版中在 uaccess 常式之外的核心對使用者記憶體的存取虛擬位址 0000000000000000 [ +0.010955] 記憶體中止資訊 [ +0.002835] ESR = 0x0000000096000004 [ +0.003872] EC = 0x25DABT (目前 EL)IL = 32 位元 [+0.005395] SET = 0FnV = 0 [ +0.003113] EA = 0, S1PTW = 0 [ +0.003182] FSC = 0x04層級 0 轉譯錯誤 [ +0.004964] 資料中止資訊[ +0.002919] ISV = 0, ISS = 0x00000004 [ +0.003886] CM = 0, WnR = 0 [+0.003040] 使用者 pgtable4k 頁面48 位元 VA pgdp=0000000115dad000 [ +0.006536[0000000000000000] pgd=0000000000000000]  、p4d=0000000000000000 [ +0.006925] 內部錯誤Oops96000004 [#1] SMP ... [+0.011113] pstate80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) [ +0.007061] pc
    __pi_strlen+0x14/0x150 [ +0.003895] lr : drm_copy_field+0x30/0x1a4 [ +0.004156] sp ffff8000094b3a50 [+0.003355] x29 ffff8000094b3a50 x28 ffff8000094b3b70 x27 000000 + [] x27 000000 [0000]0 [6000000.007242[0000]0 [604000]
    ffff443743c2ba00 x250000000000000000 x240000000000000040 [ +0.007243] x23ffff443743c2ba00 x22
    ffff8000094b3b70 x210000000000000000 [ +0.007241] x200000000000000000 x19ffff8000094b3b90 x18
    0000000000000000 [ +0.007241] x17: 0000000000000000 x16: 0000000000000000 x15: 0000aaab14b9af40 [+0.007241] x14: 0000000000000000 x13: 0000000000000000 x12: 0000000000000000 [ +0.007239] x11:
    0000000000000000 x100000000000000000 x9 ffffa524ad67d4d8 [ +0.007242] x8 0101010101010101 x7
    7f7f7f7f7f7f7f7f x6 6c6e6263606e7141 [ +0.007239] x5 0000000000000000 x4 0000000000000000 x3
    0000000000000000 [ +0.007241] x2 : 0000000000000000 x1 : ffff8000094b3b90 x0 : 0000000000000000 [+0.007240] Call trace: [ +0.002475] __pi_strlen+0x14/0x150 [ +0.003537] drm_version+0x84/0xac [ +0.003448] drm_ioctl_kernel+ 0xa8/0x16c [ +0.003975] drm_ioctl+0x270/0x580 [ +0.003448] __arm64_sys_ioctl+0xb8/0xfc [+0.003978] invoke_syscall+0x78/0x100 [ +0.003799] el0_svc_common.constprop.0+0x4c/0xf4 [ +0.004767] do_el0_svc+0x38/0x4c [ +0.003357] el0_svc+0x34/0x100 [ +0.003185] el0t_64_sync_handler+0x11c/0x150 [+0.004418] el0t_64_sync+0x190/0x194 [ +0.003716] Code: 92402c04 b200c3e8 f13fc09f 5400088c (a9400c02 ) [+0.006180] ---[ end trace 0000000000000000 ]--- (CVE-2022-50884)

請注意，Nessus 的判定取決於廠商所報告的套件是否存在。

偵測

Linux Distros 未修補的弱點：CVE-2022-50884

medium Nessus Plugin ID 280787

版本 1.21