CVE-2026-43109

In the Linux kernel, the following vulnerability has been resolved: x86: shadow stacks: proper error handling for mmap lock 김영민 reports that shstk_pop_sigframe() doesn't check for errors from mmap_read_lock_killable(), which is a silly oversight, and also shows that we haven't marked those functions with "__must_check", which would have immediately caught it. So let's fix both issues.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/1a30468eff661937d978495644d2e5ebfeef5ce6
https://git.kernel.org/stable/c/262b6d38a81d51b135db81e1f30c13d30e38feee	Patch
https://git.kernel.org/stable/c/52f657e34d7b21b47434d9d8b26fa7f6778b63a0	Patch
https://git.kernel.org/stable/c/c64cebcc5c4f223dbcbe7dcdf74908fc092a0aa4	Patch
https://git.kernel.org/stable/c/c79cf42321600e931933e11f94aba8b245d4cd66

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc1::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc2::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc3::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc4::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc5::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc6::::::
	cpe:2.3:o:linux:linux_kernel:7.0:rc7::::::

History

11 Nov 2026, 21:10

Type	Values Removed	Values Added
Summary		(es) En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta: x86: pilas en la sombra: manejo adecuado de errores para el bloqueo mmap ??? informa que shstk_pop_sigframe() no verifica errores de mmap_read_lock_killable(), lo cual es un descuido tonto, y también muestra que no hemos marcado esas funciones con ’__must_check’, lo que lo habría detectado inmediatamente. Así que solucionemos ambos problemas.

Information

Published : 2026-05-06 10:16

Updated : 2026-11-11 21:10

NVD link : CVE-2026-43109

Mitre link : CVE-2026-43109

CVE.ORG link : CVE-2026-43109

JSON object : View

Products Affected

linux

linux_kernel

CWE

NVD-CWE-noinfo

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