Linux Kernel up to 6.5.5 8250_port null pointer dereference

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5.0$0-$5k0.00

Summaryinfo

A vulnerability marked as problematic has been reported in Linux Kernel up to 6.5.5. This vulnerability affects unknown code of the component 8250_port. This manipulation causes null pointer dereference. This vulnerability is handled as CVE-2023-52567. There is not any exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in Linux Kernel up to 6.5.5 (Operating System). Affected by this vulnerability is an unknown code of the component 8250_port. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

In the Linux kernel, the following vulnerability has been resolved: serial: 8250_port: Check IRQ data before use In case the leaf driver wants to use IRQ polling (irq = 0) and IIR register shows that an interrupt happened in the 8250 hardware the IRQ data can be NULL. In such a case we need to skip the wake event as we came to this path from the timer interrupt and quite likely system is already awake. Without this fix we have got an Oops: serial8250: ttyS0 at I/O 0x3f8 (irq = 0, base_baud = 115200) is a 16550A ... BUG: kernel NULL pointer dereference, address: 0000000000000010 RIP: 0010:serial8250_handle_irq+0x7c/0x240 Call Trace: ? serial8250_handle_irq+0x7c/0x240 ? __pfx_serial8250_timeout+0x10/0x10

The weakness was released 03/02/2024. It is possible to read the advisory at git.kernel.org. This vulnerability is known as CVE-2023-52567. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 271767 (Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-112 (ALASKERNEL-5.4-2025-112)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 4.14.327, 4.19.296, 5.4.258, 5.10.198, 5.15.134, 6.1.56, 6.5.6 or 6.6 eliminates this vulnerability. Applying the patch ee5732caaffb/c334650150c2/bf3c728e3692/e14afa4450cb/2b837f13a818/e14f68a48fd4/3345cc5f02f1/cce7fc8b2996 is able to eliminate this problem. The bugfix is ready for download at git.kernel.org. The best possible mitigation is suggested to be upgrading to the latest version.

The vulnerability is also documented in the vulnerability database at Tenable (271767). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.1
VulDB Meta Temp Score: 5.0

VulDB Base Score: 4.8
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 5.5
NVD Vector: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: Partially
Local: Yes
Remote: Partially

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 271767
Nessus Name: Amazon Linux 2 : kernel, --advisory ALAS2KERNEL-5.4-2025-112 (ALASKERNEL-5.4-2025-112)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Kernel 4.14.327/4.19.296/5.4.258/5.10.198/5.15.134/6.1.56/6.5.6/6.6
Patch: ee5732caaffb/c334650150c2/bf3c728e3692/e14afa4450cb/2b837f13a818/e14f68a48fd4/3345cc5f02f1/cce7fc8b2996

Timelineinfo

03/02/2024 🔍
03/02/2024 +0 days 🔍
03/02/2024 +0 days 🔍
10/29/2025 +606 days 🔍

Sourcesinfo

Vendor: kernel.org

Advisory: git.kernel.org
Status: Confirmed

CVE: CVE-2023-52567 (🔍)
GCVE (CVE): GCVE-0-2023-52567
GCVE (VulDB): GCVE-100-255511

Entryinfo

Created: 03/02/2024 23:28
Updated: 10/29/2025 04:25
Changes: 03/02/2024 23:28 (42), 04/04/2024 08:59 (15), 12/11/2024 20:32 (13), 10/29/2025 04:25 (2)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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