0.0
NA
CVE-2026-72238
x86/boot: Validate console=uart8250 baud rate to fix early boot hang
Overview
Description
In the Linux kernel, the following vulnerability has been resolved: x86/boot: Validate console=uart8250 baud rate to fix early boot hang When the baud rate is empty, 0, invalid, or overflows to 0 when stored as an int, the system will hang during early boot because of a division by zero in early_serial_init(). Fall back to DEFAULT_BAUD when the resulting baud rate is 0 to prevent an early system hang.
Details
INFO
Published Date :
Aug. 15, 2026, 6:21 a.m.
Last Modified :
Aug. 17, 2026, 6:18 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Solution
Update the Linux kernel to prevent system hangs during early boot by validating the console baud rate.
- Update the Linux kernel to the latest version.
- Validate console baud rate during early boot.
- Fall back to default baud rate on invalid input.
References
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72238.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72238 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72238
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72238 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72238 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 17, 2026
Action Type Old Value New Value Changed Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'c1a276a731d02cbb728d0530f327a68728f2d8b0', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '24fbed0a2a45f5f379ef2b53bd2abe58be1142ad', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'efa96a22613b86e05cd81229ce0be411c1a4a79a', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '9a77a7639dfdc3eca417cd37620ce64da79c80c4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'b4d05032e9af7137eab8f3af2855073f896ca843', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'f7c67c97b37c11f2a95c204092fb8159f2779e8f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '4dad7e870c7e5178f71b5e1e4f67934b9e8cc207', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'ffa0aa5b625fe0bed7463ac613f8b06676ff4542', 'versionType': 'git'}], 'programFiles': ['arch/x86/boot/early_serial_console.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.36'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.36', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/x86/boot/early_serial_console.c'], 'defaultStatus': 'affected'}] [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'c1a276a731d02cbb728d0530f327a68728f2d8b0', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '24fbed0a2a45f5f379ef2b53bd2abe58be1142ad', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'efa96a22613b86e05cd81229ce0be411c1a4a79a', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '9a77a7639dfdc3eca417cd37620ce64da79c80c4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'b4d05032e9af7137eab8f3af2855073f896ca843', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'f7c67c97b37c11f2a95c204092fb8159f2779e8f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '4dad7e870c7e5178f71b5e1e4f67934b9e8cc207', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'ffa0aa5b625fe0bed7463ac613f8b06676ff4542', 'versionType': 'git'}], 'programFiles': ['arch/x86/boot/early_serial_console.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.36'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.36', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/x86/boot/early_serial_console.c'], 'defaultStatus': 'affected'}] -
New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'c1a276a731d02cbb728d0530f327a68728f2d8b0', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '24fbed0a2a45f5f379ef2b53bd2abe58be1142ad', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'efa96a22613b86e05cd81229ce0be411c1a4a79a', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '9a77a7639dfdc3eca417cd37620ce64da79c80c4', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'b4d05032e9af7137eab8f3af2855073f896ca843', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'f7c67c97b37c11f2a95c204092fb8159f2779e8f', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': '4dad7e870c7e5178f71b5e1e4f67934b9e8cc207', 'versionType': 'git'}, {'status': 'affected', 'version': 'ce0aa5dd20e44372f9617dd67c984f41fcdbed88', 'lessThan': 'ffa0aa5b625fe0bed7463ac613f8b06676ff4542', 'versionType': 'git'}], 'programFiles': ['arch/x86/boot/early_serial_console.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '2.6.36'}, {'status': 'unaffected', 'version': '0', 'lessThan': '2.6.36', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '5.10.261', 'versionType': 'semver', 'lessThanOrEqual': '5.10.*'}, {'status': 'unaffected', 'version': '5.15.212', 'versionType': 'semver', 'lessThanOrEqual': '5.15.*'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc4', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['arch/x86/boot/early_serial_console.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: x86/boot: Validate console=uart8250 baud rate to fix early boot hang When the baud rate is empty, 0, invalid, or overflows to 0 when stored as an int, the system will hang during early boot because of a division by zero in early_serial_init(). Fall back to DEFAULT_BAUD when the resulting baud rate is 0 to prevent an early system hang. Added Reference https://git.kernel.org/stable/c/24fbed0a2a45f5f379ef2b53bd2abe58be1142ad Added Reference https://git.kernel.org/stable/c/4dad7e870c7e5178f71b5e1e4f67934b9e8cc207 Added Reference https://git.kernel.org/stable/c/9a77a7639dfdc3eca417cd37620ce64da79c80c4 Added Reference https://git.kernel.org/stable/c/b4d05032e9af7137eab8f3af2855073f896ca843 Added Reference https://git.kernel.org/stable/c/c1a276a731d02cbb728d0530f327a68728f2d8b0 Added Reference https://git.kernel.org/stable/c/efa96a22613b86e05cd81229ce0be411c1a4a79a Added Reference https://git.kernel.org/stable/c/f7c67c97b37c11f2a95c204092fb8159f2779e8f Added Reference https://git.kernel.org/stable/c/ffa0aa5b625fe0bed7463ac613f8b06676ff4542
EPSS is a daily estimate of the probability of exploitation activity
being observed over the next 30 days. Following chart shows the EPSS
score history of the vulnerability.