CVE-2026-53282 is a vulnerability in Linux Kernel
Published on June 26, 2026
x86/kexec: Push kjump return address even for non-kjump kexec
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.
Products Associated with CVE-2026-53282
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Affected Versions
Linux:- Version 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e and below b0bd7a850e1f082560959707dbf57b0402071646 is affected.
- Version 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e and below 7dba9631faa2ee0785e8c2bf0e3d90a05f26dd8c is affected.
- Version 2cacf7f23a024ab1fdc603ca6a4f4c8b2de9f64e and below 786a45757dcdf8f2beb9d4a6db605db16c18b2b4 is affected.
- Version 6.14 is affected.
- Before 6.14 is unaffected.
- Version 6.18.33, <= 6.18.* is unaffected.
- Version 7.0.10, <= 7.0.* is unaffected.
- Version 7.1, <= * is unaffected.