Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: x86/kexec: Push kjump return address even for non-kjump kexec The version of purgatory code shipped by kexec-tools attempts to look above the top of its stack to find a return address for a kjump, even in a non-kjump kexec. After the commit in Fixes: the word above the stack might not be there, leading to a fault (which is at least now caught by my exception-handling code in kexec). That commit fixed things for the actual kjump path, but no longer "gratuitously" pushes the unused return address to the stack in the non-kjump path. Put that *back* in the non-kjump path, to prevent purgatory from crashing when trying to access it.
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e before b0bd7a850e1f082560959707dbf57b0402071646; affected 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e before 7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c; affected 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e before 786a45757dcdf8f2beb9d4a6db605db16c18b2b4 |
| Linux / Linux | affected 6.14; unaffected 0 before 6.14; unaffected 6.18.33 through 6.18.*; unaffected 7.0.10 through 7.0.*; unaffected 7.1 through * |
CWE
No CWE identifiers supplied.