CVE-2023-52746 xfrm/compat: prevent potential spectre v1 gadget in xfrm_xlate32_attr()

What is CVE-2023-52746?

CVE-2023-52746 is a low-severity vulnerability in Linux kernel, published on 21 May 2024. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

In the Linux kernel, the following vulnerability has been resolved:

xfrm/compat: prevent potential spectre v1 gadget in xfrm_xlate32_attr()

int type = nla_type(nla);

if (type > XFRMA_MAX) { return -EOPNOTSUPP; }

@type is then used as an array index and can be used as a Spectre v1 gadget.

if (nla_len(nla) < compat_policy[type].len) {

array_index_nospec() can be used to prevent leaking content of kernel memory to malicious users.

Weakness: CWE-401

Which versions are affected by CVE-2023-52746?

It affects 1 product.

Products include Linux kernel.

How do I fix CVE-2023-52746?

Apply the vendor's patch.

Is CVE-2023-52746 being exploited?

There is no known exploitation of CVE-2023-52746 in the wild and no public exploit code.

Other vulnerabilities in Linux kernel

• CVE-2026-53266 Linux Kernel Out-of-Bounds Write Exploited High 8.8
• CVE-2013-6282 Linux Kernel Improper Input Validation Exploited High 8.8
• CVE-2022-0185 Linux Kernel Heap-Based Buffer Overflow Exploited High 8.4
• CVE-2013-2094 Linux Kernel Privilege Escalation Exploited High 8.4
• CVE-2026-53362 Linux Kernel Unspecified Exploited High 7.8

All Linux kernel vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as BELL-CVE-2023-52746, DEBIAN-CVE-2023-52746, GHSA-jg34-cmw8-gw85, UBUNTU-CVE-2023-52746.