AlmaLinux 9.6 [TuxCare] 安全性更新：kernel / kernel-abi-stablelists / kernel-core / etc （ALMALINUX9.6：CLSA-2026：1778930898）

high Nessus Plugin ID 351723

語言:

概要

AlmaLinux 主機缺少一或多個安全性更新。

說明

AlmaLinux 9.6 主機已安裝的套件會受到 TuxCare ALMALINUX9.6：CLSA-2026：1778930898 公告中提及的弱點影響。

- 已解決 Linux 核心中的下列弱點：ptrace: slightly saner 'get_dumpable()' logic The 'dumpability' of a task is fundamentally about the memory image of the task - the concept comes from whether it can core dump or not - and makes no sense when you don't have an associated mm. And almost all users do in fact use it only for the case where the task has a mm pointer.
But we have one odd special case: ptrace_may_access() uses 'dumpable' to check various other things entirely independently of the MM (typically explicitly using flags like PTRACE_MODE_READ_FSCREDS).
Including for threads that no longer have a VM (and maybe never did, like most kernel threads). It's not what this flag was designed for, but it is what it is. The ptrace code does check that the uid/gid matches, so you do have to be uid-0 to see kernel thread details, but this means that the traditional drop capabilities model doesn't make any difference for this all. Make it all make a *bit* more sense by saying that if you don't have a MM pointer, we'll use a cached last dumpability flag if the thread ever had a MM (it will be zero for kernel threads since it is never set), and require a proper CAP_SYS_PTRACE capability to override. (CVE-2026-46333)

請注意，Nessus 並未測試此問題，而是僅依據應用程式自我報告的版本號碼作出判斷。