CVE-2023-1195

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2023-05-18 · updated 2026-06-17
Weakness: CWE-416

Description

A use-after-free flaw was found in reconn_set_ipaddr_from_hostname in fs/cifs/connect.c in the Linux kernel. The issue occurs when it forgets to set the free pointer server->hostname to NULL, leading to an invalid pointer request.

Affected products

Linux kernel: before 6.1; 6.1-rc1, 6.1-rc2 — fixed in 6.1

How to fix

Upgrade to a fixed version: Linux kernel 6.1. Check the vendor advisory for mitigations.

References

https://github.com/torvalds/linux/commit/153695d36ead0ccc4d0256953c751cabf673e621
https://github.com/torvalds/linux/commit/153695d36ead0ccc4d0256953c751cabf673e621

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