x86/boot: Validate console=uart8250 baud rate to fix early boot hang
Summary
| CVE | CVE-2026-72238 |
|---|---|
| State | PUBLISHED |
| Assigner | Linux |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-08-15 06:21:50 UTC |
| Updated | 2026-08-17 06:18:25 UTC |
| 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. |
Risk And Classification
EPSS: 0.002100000 probability, percentile 0.115370000 (date 2026-08-17)
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 c1a276a731d02cbb728d0530f327a68728f2d8b0 git | Not specified |
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 24fbed0a2a45f5f379ef2b53bd2abe58be1142ad git | Not specified |
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 efa96a22613b86e05cd81229ce0be411c1a4a79a git | Not specified |
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 9a77a7639dfdc3eca417cd37620ce64da79c80c4 git | Not specified |
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 b4d05032e9af7137eab8f3af2855073f896ca843 git | Not specified |
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 f7c67c97b37c11f2a95c204092fb8159f2779e8f git | Not specified |
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 4dad7e870c7e5178f71b5e1e4f67934b9e8cc207 git | Not specified |
| CNA | Linux | Linux | affected ce0aa5dd20e44372f9617dd67c984f41fcdbed88 ffa0aa5b625fe0bed7463ac613f8b06676ff4542 git | Not specified |
| CNA | Linux | Linux | affected 2.6.36 | Not specified |
| CNA | Linux | Linux | unaffected 2.6.36 semver | Not specified |
| CNA | Linux | Linux | unaffected 5.10.261 5.10.* semver | Not specified |
| CNA | Linux | Linux | unaffected 5.15.212 5.15.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.1.178 6.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.6.145 6.6.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.12.97 6.12.* semver | Not specified |
| CNA | Linux | Linux | unaffected 6.18.40 6.18.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.1.5 7.1.* semver | Not specified |
| CNA | Linux | Linux | unaffected 7.2 * original_commit_for_fix | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| git.kernel.org/stable/c/ffa0aa5b625fe0bed7463ac613f8b06676ff4542 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/efa96a22613b86e05cd81229ce0be411c1a4a79a | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/9a77a7639dfdc3eca417cd37620ce64da79c80c4 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/b4d05032e9af7137eab8f3af2855073f896ca843 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/c1a276a731d02cbb728d0530f327a68728f2d8b0 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/4dad7e870c7e5178f71b5e1e4f67934b9e8cc207 | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/24fbed0a2a45f5f379ef2b53bd2abe58be1142ad | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| git.kernel.org/stable/c/f7c67c97b37c11f2a95c204092fb8159f2779e8f | 416baaa9-dc9f-4396-8d5f-8c081fb06d67 | git.kernel.org | |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
No vendor comments have been submitted for this CVE.
There are currently no legacy QID mappings associated with this CVE.