CVE-2026-72238

x86/boot: Validate console=uart8250 baud rate to fix early boot hang

State: Published
Severity: Not scored
Published: Aug 15, 2026
Updated: Aug 17, 2026
Reserved: Aug 9, 2026

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.

Scores

The record has no CVSS score.

Weaknesses

The record names no weakness.

Affected Products

Product	Versions
LinuxLinux	ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before c1a276a731d02cbb728d0530f327a68728f2d8b0Affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before 24fbed0a2a45f5f379ef2b53bd2abe58be1142adAffected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before efa96a22613b86e05cd81229ce0be411c1a4a79aAffected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before 9a77a7639dfdc3eca417cd37620ce64da79c80c4Affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before b4d05032e9af7137eab8f3af2855073f896ca843Affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before f7c67c97b37c11f2a95c204092fb8159f2779e8fAffected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before 4dad7e870c7e5178f71b5e1e4f67934b9e8cc207Affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before ffa0aa5b625fe0bed7463ac613f8b06676ff4542Affected
LinuxLinux	2.6.36Affected before 2.6.36Not affected 5.10.261 through 5.10.Not affected 5.15.212 through 5.15.Not affected 6.1.178 through 6.1.Not affected 6.6.145 through 6.6.Not affected 6.12.97 through 6.12.Not affected 6.18.40 through 6.18.Not affected 7.1.5 through 7.1.*Not affected 7.2 and laterNot affected

Product

Versions

LinuxLinux

ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before c1a276a731d02cbb728d0530f327a68728f2d8b0Affected
ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before 24fbed0a2a45f5f379ef2b53bd2abe58be1142adAffected
ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before efa96a22613b86e05cd81229ce0be411c1a4a79aAffected
ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before 9a77a7639dfdc3eca417cd37620ce64da79c80c4Affected
ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before b4d05032e9af7137eab8f3af2855073f896ca843Affected
ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before f7c67c97b37c11f2a95c204092fb8159f2779e8fAffected
ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before 4dad7e870c7e5178f71b5e1e4f67934b9e8cc207Affected
ce0aa5dd20e44372f9617dd67c984f41fcdbed88 to before ffa0aa5b625fe0bed7463ac613f8b06676ff4542Affected

LinuxLinux

2.6.36Affected
before 2.6.36Not affected
5.10.261 through 5.10.*Not affected
5.15.212 through 5.15.*Not affected
6.1.178 through 6.1.*Not affected
6.6.145 through 6.6.*Not affected
6.12.97 through 6.12.*Not affected
6.18.40 through 6.18.*Not affected
7.1.5 through 7.1.*Not affected
7.2 and laterNot affected

References

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