CVE-2023-0459: Copy_from_user Spectre-V1 Gadget in Linux Kernel
First published: Thu May 25 2023(Updated: )
Copy_from_user on 64-bit versions of the Linux kernel does not implement the __uaccess_begin_nospec allowing a user to bypass the "access_ok" check and pass a kernel pointer to copy_from_user(). This would allow an attacker to leak information. We recommend upgrading beyond commit 74e19ef0ff8061ef55957c3abd71614ef0f42f47
Credit: cve-coordination@google.com cve-coordination@google.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Linux kernel | <2023-02-21 | |
| Linux Linux kernel | <4.14.307 | |
| Linux Linux kernel | >=4.19.0<4.19.274 | |
| Linux Linux kernel | >=5.4.0<5.4.233 | |
| Linux Linux kernel | >=5.10.0<5.10.170 | |
| Linux Linux kernel | >=5.15.0<5.15.96 | |
| Linux Linux kernel | >=6.1.0<6.1.14 | |
| Linux Linux kernel | >=6.2.0<6.2.1 | |
| debian/linux | 5.10.223-1 5.10.226-1 6.1.115-1 6.1.119-1 6.12.6-1 |
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Reference Links
- https://github.com/torvalds/linux/commit/4b842e4e25b12951fa10dedb4bc16bc47e3b850c
- https://github.com/torvalds/linux/commit/74e19ef0ff8061ef55957c3abd71614ef0f42f47
- https://launchpad.net/bugs/cve/CVE-2023-0459
- https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2023-0459
- https://nvd.nist.gov/vuln/detail/CVE-2023-0459
- https://security-tracker.debian.org/tracker/CVE-2023-0459
- https://ubuntu.com/security/CVE-2023-0459
- https://github.com/google/security-research/security/advisories/GHSA-m7j5-797w-vmrh
- https://git.kernel.org/linus/74e19ef0ff8061ef55957c3abd71614ef0f42f47
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