Important: kernel security and bug fix update

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.

Red Hat Product Security has rated this update as having a security impact of Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

• kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe (CVE-2023-2163)
• kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags (CVE-2023-3812)
• kernel: use after free in nvmet_tcp_free_crypto in NVMe (CVE-2023-5178)
• kernel: use-after-free due to race condition occurring in dvb_register_device() (CVE-2022-45884)
• kernel: use-after-free due to race condition occurring in dvb_net.c (CVE-2022-45886)
• kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c (CVE-2022-45919)
• kernel: use-after-free in smb2_is_status_io_timeout() (CVE-2023-1192)

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):

• Random delay receiving packets after bringing up VLAN on top of VF with vf-vlan-pruning enabled (BZ#2240750)
• bpf_jit_limit hit again (BZ#2243011)
• HPE Edgeline 920t resets during kdump context when ice driver is loaded and when system is booted with intel_iommu=on iommu=pt (BZ#2244625)

Solution

For 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 Products

• Red Hat Enterprise Linux for x86_64 8 x86_64
• Red Hat Enterprise Linux for IBM z Systems 8 s390x
• Red Hat Enterprise Linux for Power, little endian 8 ppc64le
• Red Hat Enterprise Linux for ARM 64 8 aarch64
• Red Hat CodeReady Linux Builder for x86_64 8 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian 8 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 8 aarch64

Fixes

• BZ - 2148510 - CVE-2022-45884 kernel: use-after-free due to race condition occurring in dvb_register_device()
• BZ - 2148517 - CVE-2022-45886 kernel: use-after-free due to race condition occurring in dvb_net.c
• BZ - 2151956 - CVE-2022-45919 kernel: use-after-free due to race condition occurring in dvb_ca_en50221.c
• BZ - 2154178 - CVE-2023-1192 kernel: use-after-free in smb2_is_status_io_timeout()
• BZ - 2224048 - CVE-2023-3812 kernel: tun: bugs for oversize packet when napi frags enabled in tun_napi_alloc_frags
• BZ - 2240249 - CVE-2023-2163 kernel: bpf: Incorrect verifier pruning leads to unsafe code paths being incorrectly marked as safe
• BZ - 2241924 - CVE-2023-5178 kernel: use after free in nvmet_tcp_free_crypto in NVMe

CVEs

• CVE-2022-45884
• CVE-2022-45886
• CVE-2022-45919
• CVE-2023-1192
• CVE-2023-2163
• CVE-2023-3812
• CVE-2023-5178

References

• https://access.redhat.com/security/updates/classification/#important