Unrated severityNVD Advisory· Published Mar 26, 2021· Updated Aug 4, 2024
CVE-2020-25578
CVE-2020-25578
Description
In FreeBSD 12.2-STABLE before r368969, 11.4-STABLE before r369047, 12.2-RELEASE before p3, 12.1-RELEASE before p13 and 11.4-RELEASE before p7 several file systems were not properly initializing the d_off field of the dirent structures returned by VOP_READDIR. In particular, tmpfs(5), smbfs(5), autofs(5) and mqueuefs(5) were failing to do so. As a result, eight uninitialized kernel stack bytes may be leaked to userspace by these file systems.
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Affected products
2- FreeBSD/FreeBSDdescription
Patches
Vulnerability mechanics
References
2- security.freebsd.org/advisories/FreeBSD-SA-21:01.fsdisclosure.ascmitrex_refsource_MISC
- security.netapp.com/advisory/ntap-20210423-0002/mitrex_refsource_CONFIRM
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