Security Vulnerabilities fixed in kernel-rt RHSA-2021:2726

Description

The kernel-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements. Security Fix(es): kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909) kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034) kernel: use-after-free in show_numa_stats function (CVE-2019-20934) kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668) kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c (CVE-2021-33033) kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909) kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034) kernel: use-after-free in show_numa_stats function (CVE-2019-20934) kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668) kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c (CVE-2021-33033) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. Bug Fix(es): kernel-rt: update to the latest RHEL7.9.z7 source tree (BZ#1967333) SolutionFor details on how to apply this update, which includes the changes described in this advisory, refer to:https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect.

Affected Applications

kernel-rt

CVE References

CVE-2021-33034 CVE-2021-33033 CVE-2020-11668 CVE-2019-20934 CVE-2021-33909

Other References

https://access.redhat.com/errata/RHSA-2021:2726