CVE-2024-26946: kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address
First published: Wed May 01 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: kprobes/x86: Use copy_from_kernel_nofault() to read from unsafe address Read from an unsafe address with copy_from_kernel_nofault() in arch_adjust_kprobe_addr() because this function is used before checking the address is in text or not. Syzcaller bot found a bug and reported the case if user specifies inaccessible data area, arch_adjust_kprobe_addr() will cause a kernel panic. [ mingo: Clarified the comment. ]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <6.1.84 | 6.1.84 |
| redhat/kernel | <6.6.24 | 6.6.24 |
| redhat/kernel | <6.7.12 | 6.7.12 |
| redhat/kernel | <6.8.3 | 6.8.3 |
| redhat/kernel | <6.9 | 6.9 |
| debian/linux | 5.10.223-1 5.10.234-1 6.1.129-1 6.1.135-1 6.12.25-1 |
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Reference Links
- https://git.kernel.org/stable/c/20fdb21eabaeb8f78f8f701f56d14ea0836ec861
- https://git.kernel.org/stable/c/4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b
- https://git.kernel.org/stable/c/6417684315087904fffe8966d27ca74398c57dd6
- https://git.kernel.org/stable/c/b69f577308f1070004cafac106dd1a44099e5483
- https://git.kernel.org/stable/c/f13edd1871d4fb4ab829aff629d47914e251bae3
- https://launchpad.net/bugs/cve/CVE-2024-26946
- https://access.redhat.com/security/cve/CVE-2024-26946
- https://lore.kernel.org/linux-cve-announce/2024050126-CVE-2024-26946-ad5d@gregkh/T
- https://bugzilla.redhat.com/show_bug.cgi/show_bug.cgi?id=2278207
- https://access.redhat.com/errata/RHSA-2024:6268
- https://access.redhat.com/errata/RHSA-2024:6267
- https://access.redhat.com/errata/RHSA-2024:6567
- https://bugzilla.redhat.com/show_bug.cgi?id=2278206
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2024-26946
- https://nvd.nist.gov/vuln/detail/CVE-2024-26946
- https://security-tracker.debian.org/tracker/CVE-2024-26946
- https://ubuntu.com/security/CVE-2024-26946
- https://git.kernel.org/linus/4e51653d5d871f40f1bd5cf95cc7f2d8b33d063b
Frequently Asked Questions
What is the severity of CVE-2024-26946?
CVE-2024-26946 has been classified with a high severity level due to the potential risk of reading from unsafe memory addresses.
How do I fix CVE-2024-26946?
To fix CVE-2024-26946, update to the patched kernel versions 6.1.84, 6.6.24, 6.7.12, 6.8.3, or 6.9 for Red Hat, or to the specified versions for Debian.
Which Linux kernel versions are affected by CVE-2024-26946?
CVE-2024-26946 affects multiple versions of the Linux kernel prior to the specified patched versions.
What systems are at risk from CVE-2024-26946?
Systems running vulnerable versions of the Linux kernel, particularly those in Red Hat and Debian distributions, are at risk from CVE-2024-26946.
Is CVE-2024-26946 being actively exploited?
As of now, there is no public information indicating that CVE-2024-26946 is being actively exploited in the wild.
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