CVE-2023-52646: aio: fix mremap after fork null-deref
First published: Fri Apr 26 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: aio: fix mremap after fork null-deref Commit e4a0d3e720e7 ("aio: Make it possible to remap aio ring") introduced a null-deref if mremap is called on an old aio mapping after fork as mm->ioctx_table will be set to NULL. [jmoyer@redhat.com: fix 80 column issue]
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Linux Kernel | >=3.19<4.14.306 | |
| Linux Kernel | >=4.15<4.19.273 | |
| Linux Kernel | >=4.20<5.4.232 | |
| Linux Kernel | >=5.5<5.10.169 | |
| Linux Kernel | >=5.11<5.15.95 | |
| Linux Kernel | >=5.16<6.1.13 | |
| Linux Kernel | =6.2-rc1 | |
| Linux Kernel | =6.2-rc2 | |
| Linux Kernel | =6.2-rc3 | |
| Linux Kernel | =6.2-rc4 | |
| Linux Kernel | =6.2-rc5 | |
| Linux Kernel | =6.2-rc6 | |
| Linux Kernel | =6.2-rc7 | |
| Linux Kernel | =6.2-rc8 | |
| Linux kernel |
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Reference Links
- https://git.kernel.org/stable/c/808f1e4b5723ae4eda724d2ad6f6638905eefd95
- https://git.kernel.org/stable/c/d8dca1bfe9adcae38b35add64977818c0c13dd22
- https://git.kernel.org/stable/c/4326d0080f7e84fba775da41d158f46cf9d3f1c2
- https://git.kernel.org/stable/c/c261f798f7baa8080cf0214081d43d5f86bb073f
- https://git.kernel.org/stable/c/178993157e8c50aef7f35d7d6d3b44bb428199e1
- https://git.kernel.org/stable/c/af126acf01a12bdb04986fd26fc2eb3b40249e0d
- https://git.kernel.org/stable/c/81e9d6f8647650a7bead74c5f926e29970e834d1
Frequently Asked Questions
What is the severity of CVE-2023-52646?
CVE-2023-52646 has been assigned a severity level that indicates it could lead to a null pointer dereference in the Linux kernel.
How do I fix CVE-2023-52646?
To resolve CVE-2023-52646, update to the latest version of the Linux kernel that includes the patch for this vulnerability.
Which versions of Linux kernel are affected by CVE-2023-52646?
CVE-2023-52646 affects multiple versions of the Linux kernel, specifically from versions 3.19 through 6.2-rc8.
What systems are vulnerable to CVE-2023-52646?
Any systems running an affected version of the Linux kernel may be vulnerable to CVE-2023-52646 due to the potential for a null dereference when using aio mappings.
Is CVE-2023-52646 a remote exploit?
CVE-2023-52646 is not categorized as a remote exploit; it is an issue that arises during local operations involving memory remapping.
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