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cifs-utils: local privilege escalation via forged cifs.spnego key description in cifs.upcall

🗓️ 29 Jun 2026 23:15:30Reported by RedHatType 
redhat
 redhat
🔗 access.redhat.com👁 11 Views

Cifs-utils upcall preserves root during user lookup, enabling attacker to load NSS module as root.

Related
Packages
Refs
OSOS VersionArchitecturePackagePackage VersionFilename
Red Hat Enterprise Linux10.2aarch64cifs-utils7.6-1.el10_2cifs-utils-7.6-1.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lecifs-utils7.6-1.el10_2cifs-utils-7.6-1.el10_2.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xcifs-utils7.6-1.el10_2cifs-utils-7.6-1.el10_2.s390x.rpm
Red Hat Enterprise Linux10.2x86_64cifs-utils7.6-1.el10_2cifs-utils-7.6-1.el10_2.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64cifs-utils-debuginfo7.6-1.el10_2cifs-utils-debuginfo-7.6-1.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lecifs-utils-debuginfo7.6-1.el10_2cifs-utils-debuginfo-7.6-1.el10_2.ppc64le.rpm
Red Hat Enterprise Linux10.2s390xcifs-utils-debuginfo7.6-1.el10_2cifs-utils-debuginfo-7.6-1.el10_2.s390x.rpm
Red Hat Enterprise Linux10.2x86_64cifs-utils-debuginfo7.6-1.el10_2cifs-utils-debuginfo-7.6-1.el10_2.x86_64.rpm
Red Hat Enterprise Linux10.2aarch64cifs-utils-debugsource7.6-1.el10_2cifs-utils-debugsource-7.6-1.el10_2.aarch64.rpm
Red Hat Enterprise Linux10.2ppc64lecifs-utils-debugsource7.6-1.el10_2cifs-utils-debugsource-7.6-1.el10_2.ppc64le.rpm
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31 Aug 2026 18:14Current
6Medium risk
Vulners AI Score6
CVSS 3.17.8
EPSS0.00157
SSVC
11