PT-2024-21573 · Linux+9 · Linux Kernel+9
Syzbot
+1
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Published
2024-02-02
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Updated
2025-09-29
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CVE-2024-26906
CVSS v3.1
5.5
Medium
| Vector | AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Linux kernel versions prior to 6.7.0+ #58
Description
A vulnerability in the Linux kernel has been resolved, where a bpf program using
bpf probe read kernel() to read from the vsyscall page invokes copy from kernel nofault(), which in turn calls get user asm(). This triggers a page fault exception because the vsyscall page address is not readable from kernel space. The handle page fault() function considers the vsyscall page address as a user space address instead of a kernel space address, resulting in the fix-up setup by bpf not being applied and a page fault oops() being invoked due to SMAP.Recommendations
To resolve this issue, update the Linux kernel to a version that includes the fix for this vulnerability. Specifically, for Linux kernel version 6.7.0+, ensure you are running a version later than #58. If you are using an earlier version, consider upgrading to a newer version to mitigate the risk. As a temporary workaround, consider restricting the use of
bpf probe read kernel() to minimize the risk of exploitation.Exploit
Fix
RCE
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Weakness Enumeration
Related Identifiers
Affected Products
Almalinux
Astra Linux
Centos
Linuxmint
Linux Kernel
Red Hat
Red Os
Rocky Linux
Suse
Ubuntu