CVE-2020-10702

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2020-06-04 · updated 2026-06-17
Weakness: CWE-325

Description

A flaw was found in QEMU in the implementation of the Pointer Authentication (PAuth) support for ARM introduced in version 4.0 and fixed in version 5.0.0. A general failure of the signature generation process caused every PAuth-enforced pointer to be signed with the same signature. A local attacker could obtain the signature of a protected pointer and abuse this flaw to bypass PAuth protection for all programs running on QEMU.

Affected products

QEMU: from 4.0.0 before 5.0.0 — fixed in 5.0.0

How to fix

Upgrade to a fixed version: QEMU 5.0.0. Check the vendor advisory for mitigations.

References

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10702
https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=de0b1bae6461f67243282555475f88b2384a1eb9
https://security.netapp.com/advisory/ntap-20200724-0007/
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2020-10702
https://git.qemu.org/?p=qemu.git%3Ba=commit%3Bh=de0b1bae6461f67243282555475f88b2384a1eb9
https://security.netapp.com/advisory/ntap-20200724-0007/

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