CVE-2023-52735: bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself
First published: Tue May 21 2024(Updated: )
In the Linux kernel, the following vulnerability has been resolved: bpf, sockmap: Don't let sock_map_{close,destroy,unhash} call itself sock_map proto callbacks should never call themselves by design. Protect against bugs like [1] and break out of the recursive loop to avoid a stack overflow in favor of a resource leak. [1] https://lore.kernel.org/all/00000000000073b14905ef2e7401@google.com/
Credit: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
| Affected Software | Affected Version | How to fix |
|---|---|---|
| redhat/kernel | <5.15.95 | 5.15.95 |
| redhat/kernel | <6.1.13 | 6.1.13 |
| redhat/kernel | <6.2 | 6.2 |
| Linux Kernel | <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 |
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Reference Links
- https://git.kernel.org/stable/c/5b4a79ba65a1ab479903fff2e604865d229b70a9
- https://git.kernel.org/stable/c/7499859881488da97589f3c79cc66fa75748ad49
- https://git.kernel.org/stable/c/f312367f5246e04df564d341044286e9e37a97ba
- https://access.redhat.com/security/cve/CVE-2023-52735
- https://lore.kernel.org/linux-cve-announce/2024052100-CVE-2023-52735-4df1@gregkh/T
- https://access.redhat.com/errata/RHSA-2024:5673
- https://access.redhat.com/errata/RHSA-2024:5672
- https://bugzilla.redhat.com/show_bug.cgi?id=2282618
Frequently Asked Questions
What is the severity of CVE-2023-52735?
CVE-2023-52735 is classified as a high severity vulnerability in the Linux kernel.
How do I fix CVE-2023-52735?
To fix CVE-2023-52735, update the Linux kernel to version 5.15.95, 6.1.13, or 6.2 or later.
What systems are affected by CVE-2023-52735?
CVE-2023-52735 affects various versions of the Linux kernel including 5.15.x and 6.1.x before 6.2.
What kind of vulnerability is CVE-2023-52735?
CVE-2023-52735 is a recursive loop vulnerability in the BPF sockmap implementation of the Linux kernel.
Is CVE-2023-52735 exploitable remotely?
CVE-2023-52735 could be exploited by an attacker with local access to the system potentially resulting in denial of service.
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