Discover the critical Copy Fail flaw in the Linux kernel that enables local users to gain root access. Learn how to protect your systems now.
The post Copy Fail Linux Kernel Flaw Allows Local Users to Gain Root appeared first on Linux Today.
Linux server admins may get the ability to turn off a vulnerable function in the OS kernel until a patch for a zero-day vulnerability is ready, if a proposal from a kernel developer and maintainer is accepted by the open source community.
The idea of a kill switch for privileged operators has been suggested by Sasha Levin, a distinguished engineer at Nvidia and co-maintainer of the long-term…
Linux server admins may get the ability to turn off a vulnerable function in the OS kernel until a patch for a zero-day vulnerability is ready, if a proposal from a kernel developer and maintainer is accepted by the open source community.
The idea of a kill switch for privileged operators has been suggested by Sasha Levin, a distinguished engineer at Nvidia and co-maintainer of the long-term…
Security researchers are warning of a new “logic flaw” in Linux called Copy Fail (CVE-2026-31431), a critical vulnerability that poses a threat to all users running a Linux-based operating system.
Xint Code discovered the flaw in Linux’s authencesn cryptographic template, which “lets an unprivileged local user trigger a deterministic, controlled 4-byte write into the page cache of any readable…
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Linux Copy Fail (CVE-2026-31431) is a critical privilege escalation flaw affecting major distributions since 2017. Learn risks, fixes, and mitigation steps.
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This was announced yesterday. It is a very serious bug and literally affects every version of the Linux kernel shipped since 2017. IIt is also apparently trivial to use (i.e. 732 bytes of Python code literally gets you root on ANY distro released since 2017). If you haven't updated your Linux distro recently, you really need to. The fix is also trivial, and should be available for all maintained…
CSOs must ensure their Linux-based systems block unauthorized privilege escalation until distros release patches to plug a serious kernel vulnerability affecting all Linux distributions shipped since 2017.
Until fixes are available for what’s been dubbed the Copy Fail logic bug (CVE-2026-31431_),_ which lets users easily obtain root access, there isn’t much CSOs can do, says Johannes Ullrich,…
A newly disclosed Linux kernel vulnerability called Copy Fail lets a normal user gain root access using just a 732-byte script. The exploit is simple, reliable, and works across major distributions like Ubuntu, RHEL, and SUSE. Even worse, it silently modifies the page cache instead of files on disk, making detection difficult and raising concerns for both local systems and containerized…
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