CVE-2023-0458 Spectre V1 Gadget in do_prlimit in the Linux Kernel

What is CVE-2023-0458?

CVE-2023-0458 is a medium-severity vulnerability in Debian Debian Linux, published on 26 Apr 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A speculative pointer dereference problem exists in the Linux Kernel on the do_prlimit() function. The resource argument value is controlled and is used in pointer arithmetic for the 'rlim' variable and can be used to leak the contents. We recommend upgrading past version 6.1.8 or commit 739790605705ddcf18f21782b9c99ad7d53a8c11

Weakness: CWE-476

Which versions are affected by CVE-2023-0458?

It affects 2 products.

Products include Debian Debian Linux, Linux kernel.

How do I fix CVE-2023-0458?

Upgrade to a fixed version.

Is CVE-2023-0458 being exploited?

There is no known exploitation of CVE-2023-0458 in the wild and no public exploit code.

Other vulnerabilities in Debian Debian Linux

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• CVE-2025-49113 RoundCube Webmail Deserialization of Untrusted Data Exploited Critical 9.9
• CVE-2026-24061 GNU InetUtils Argument Injection Exploited Critical 9.8
• CVE-2025-39682 Linux Kernel Improper Check for Unusual or Exceptional Conditions Exploited Critical 9.8
• CVE-2024-9680 Mozilla Firefox Use-After-Free Exploited Critical 9.8

All Debian Debian Linux vulnerabilities

Sources

• CVE record
• NVD
• OSV
• How this page is made

Also known as AZL-26415, DEBIAN-CVE-2023-0458, UBUNTU-CVE-2023-0458.