Linux/Unix ホストには、ベンダーが提供するパッチが利用できない脆弱性の影響を受ける複数のパッケージがインストールされています。

  - Linux カーネルでは、以下の脆弱性が解決されています: arm64: kexec: initialize kexec_buf struct in load_other_segments() Patch series kexec: Fix invalid field access. The kexec_buf structure was previously declared without initialization. commit bf454ec31add (kexec_file: allow to place kexec_buf randomly) added a field that is always read but not consistently populated by all architectures. This un-initialized field will contain garbage. This is also triggering a UBSAN warning when the uninitialized data was accessed: ------------[ cut here ]------------ UBSAN: invalid-load in ./include/linux/kexec.h:210:10 load of value 252 is not a valid value for type '_Bool' Zero-initializing kexec_buf at declaration ensures all fields are cleanly set, preventing future instances of uninitialized memory being used. An initial fix was already landed for arm64[0], and this patchset fixes the problem on the remaining arm64 code and on riscv, as raised by Mark. Discussions about this problem could be found at[1][2]. This patch (of 3): The kexec_buf structure was previously declared without initialization.
    commit bf454ec31add (kexec_file: allow to place kexec_buf randomly) added a field that is always read but not consistently populated by all architectures. This un-initialized field will contain garbage. This is also triggering a UBSAN warning when the uninitialized data was accessed: ------------[ cut here]------------ UBSAN: invalid-load in ./include/linux/kexec.h:210:10 load of value 252 is not a valid value for type '_Bool' Zero-initializing kexec_buf at declaration ensures all fields are cleanly set, preventing future instances of uninitialized memory being used. (CVE-2025-39904)

Nessus は、ベンダーによって報告されたパッケージの存在に依存していることに注意してください。

検出

Linux Distros のパッチ未適用の脆弱性: CVE-2025-39904

medium Nessus プラグイン ID 269664

バージョン 1.4