CVE-2023-53470: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: ionic: catch failure from devlink_alloc Add a check for NULL on the alloc return. If devlink_alloc() fails and we try to use devlink_priv() on the NULL return, the kernel gets very unhappy and panics. With this fix, the driver load will still fail, but at least it won't panic the kernel.

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CVSS v3.1 Score

5.5

MEDIUM

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-476 CWE-476

Affected Products

Vendor	Product	Versions
linux	linux_kernel	5.4 — 5.15.112
linux	linux_kernel	5.16 — 6.1.29
linux	linux_kernel	6.2 — 6.2.16
linux	linux_kernel	6.3 — 6.3.3

References

Advisories & Patches

https://git.kernel.org/stable/c/0020c16c8af7f4bc9503a2088fb30793b6771fac https://git.kernel.org/stable/c/0d02efe7f25158c93146e3bb827bc7bb3cd5e71a https://git.kernel.org/stable/c/4a54903ff68ddb33b6463c94b4eb37fc584ef760 https://git.kernel.org/stable/c/5325f50de5b1433b27dda7ccff5cb7283722a3f1 https://git.kernel.org/stable/c/c177dd465f5c1e5f242cdb9258826c591c257e9a

Frequently Asked Questions

What is CVE-2023-53470? +

In the Linux kernel, the following vulnerability has been resolved: ionic: catch failure from devlink_alloc Add a check for NULL on the alloc return. If devlink_alloc() fails and we try to use devlink_priv() on the NULL return, the kernel gets very unhappy and panics. With this fix, the driver load will still fail, but at least it won't panic the kernel. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53470? +

CVE-2023-53470 has a CVSS v3.1 score of 5.5 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance.

What products are affected by CVE-2023-53470? +

CVE-2023-53470 affects products from linux, specifically: linux_kernel. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2023-53470? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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