CVE-2023-53464: linux kernel Null Dereference — Fix

Description

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi_tcp: Check that sock is valid before iscsi_set_param() The validity of sock should be checked before assignment to avoid incorrect values. Commit 57569c37f0ad ("scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()") introduced this change which may lead to inconsistent values of tcp_sw_conn->sendpage and conn->datadgst_en. Fix the issue by moving the position of the assignment.

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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	5.10.150 — 5.10.178
linux	linux_kernel	5.15.75 — 5.15.107
linux	linux_kernel	5.19.17 — 6.0
linux	linux_kernel	6.0.3 — 6.1.24
linux	linux_kernel	6.2 — 6.2.11
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All
linux	linux_kernel	All

References

Advisories & Patches

https://git.kernel.org/stable/c/48b19b79cfa37b1e50da3b5a8af529f994c08901 https://git.kernel.org/stable/c/499757ad3332e2527254f9ab68dec1da087b1d96 https://git.kernel.org/stable/c/5e5c5f472972c4bc9430adc08b36763a0fa5b9f7 https://git.kernel.org/stable/c/6e06a68fbbfcd8576eee8f7139fa2b13c9b72e91 https://git.kernel.org/stable/c/b287e21e73ec23f3788fbe40037c42dbe6e9a9a9

Frequently Asked Questions

What is CVE-2023-53464? +

In the Linux kernel, the following vulnerability has been resolved: scsi: iscsi_tcp: Check that sock is valid before iscsi_set_param() The validity of sock should be checked before assignment to avoid incorrect values. Commit 57569c37f0ad ("scsi: iscsi: iscsi_tcp: Fix null-ptr-deref while calling getpeername()") introduced this change which may lead to inconsistent values of tcp_sw_conn->sendpage and conn->datadgst_en. Fix the issue by moving the position of the assignment. It has a CVSS v3.1 base score of 5.5 (MEDIUM).

How severe is CVE-2023-53464? +

CVE-2023-53464 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-2023-53464? +

CVE-2023-53464 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-2023-53464? +

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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