RHSA-2024:0930 - Security Advisory

Topic

An update for kernel is now available for Red Hat Enterprise Linux 8.6 Extended Update Support.

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: GSM multiplexing race condition leads to privilege escalation (CVE-2023-6546)
• kernel: malicious data for FBIOPUT_VSCREENINFO ioctl may cause OOB write memory (CVE-2021-33655)
• kernel: KVM: nVMX: missing IBPB when exiting from nested guest can lead to Spectre v2 attacks (CVE-2022-2196)
• kernel: media: em28xx: initialize refcount before kref_get (CVE-2022-3239)
• kernel: use-after-free after failed devlink reload in devlink_param_get (CVE-2022-3625)
• kernel: net/packet: slab-out-of-bounds access in packet_recvmsg() (CVE-2022-20368)
• hw: cpu: arm64: Spectre-BHB (CVE-2022-23960)
• kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c (CVE-2022-29581)
• kernel: vmwgfx: integer overflow in vmwgfx_execbuf.c (CVE-2022-36402)
• kernel: vmwgfx: NULL pointer dereference in vmw_cmd_dx_define_query (CVE-2022-38096)
• kernel: vmwgfx: use-after-free in vmw_cmd_res_check (CVE-2022-38457)
• kernel: vmwgfx: use-after-free in vmw_execbuf_tie_context (CVE-2022-40133)
• kernel: sctp: fail if no bound addresses can be used for a given scope (CVE-2023-1074)
• kernel: Out of boundary write in perf_read_group() as result of overflow a perf_event's read_size (CVE-2023-6931)
• kernel: KVM: nVMX: missing consistency checks for CR0 and CR4 (CVE-2023-30456)
• kernel: blocking operation in dvb_frontend_get_event and wait_event_interruptible (CVE-2023-31084)
• kernel: use-after-free in amdgpu_cs_wait_all_fences in drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c (CVE-2023-51042)
• kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function (CVE-2024-1086)

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.

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 - Extended Update Support 8.6 x86_64
• Red Hat Enterprise Linux Server - AUS 8.6 x86_64
• Red Hat Enterprise Linux for IBM z Systems - Extended Update Support 8.6 s390x
• Red Hat Enterprise Linux for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat Virtualization Host 4 for RHEL 8 x86_64
• Red Hat Enterprise Linux Server - TUS 8.6 x86_64
• Red Hat Enterprise Linux for ARM 64 - Extended Update Support 8.6 aarch64
• Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions 8.6 ppc64le
• Red Hat Enterprise Linux for x86_64 - Update Services for SAP Solutions 8.6 x86_64
• Red Hat CodeReady Linux Builder for x86_64 - Extended Update Support 8.6 x86_64
• Red Hat CodeReady Linux Builder for Power, little endian - Extended Update Support 8.6 ppc64le
• Red Hat CodeReady Linux Builder for ARM 64 - Extended Update Support 8.6 aarch64

Fixes

• BZ - 2062284 - CVE-2022-23960 hw: cpu: arm64: Spectre-BHB
• BZ - 2088021 - CVE-2022-29581 kernel: use-after-free due to improper update of reference count in net/sched/cls_u32.c
• BZ - 2108691 - CVE-2021-33655 kernel: malicious data for FBIOPUT_VSCREENINFO ioctl may cause OOB write memory
• BZ - 2123695 - CVE-2022-20368 kernel: net/packet: slab-out-of-bounds access in packet_recvmsg()
• BZ - 2127985 - CVE-2022-3239 kernel: media: em28xx: initialize refcount before kref_get
• BZ - 2133451 - CVE-2022-36402 kernel: vmwgfx: integer overflow in vmwgfx_execbuf.c
• BZ - 2133452 - CVE-2022-38096 kernel: vmwgfx: NULL pointer dereference in vmw_cmd_dx_define_query
• BZ - 2133453 - CVE-2022-40133 kernel: vmwgfx: use-after-free in vmw_execbuf_tie_context
• BZ - 2133455 - CVE-2022-38457 kernel: vmwgfx: use-after-free in vmw_cmd_res_check
• BZ - 2144720 - CVE-2022-3625 kernel: use-after-free after failed devlink reload in devlink_param_get
• BZ - 2160023 - CVE-2022-2196 kernel: KVM: nVMX: missing IBPB when exiting from nested guest can lead to Spectre v2 attacks
• BZ - 2173430 - CVE-2023-1074 kernel: sctp: fail if no bound addresses can be used for a given scope
• BZ - 2188468 - CVE-2023-30456 kernel: KVM: nVMX: missing consistency checks for CR0 and CR4
• BZ - 2213139 - CVE-2023-31084 kernel: blocking operation in dvb_frontend_get_event and wait_event_interruptible
• BZ - 2252731 - CVE-2023-6931 kernel: Out of boundary write in perf_read_group() as result of overflow a perf_event's read_size
• BZ - 2255498 - CVE-2023-6546 kernel: GSM multiplexing race condition leads to privilege escalation
• BZ - 2259866 - CVE-2023-51042 kernel: use-after-free in amdgpu_cs_wait_all_fences in drivers/gpu/drm/amd/amdgpu/amdgpu_cs.c
• BZ - 2262126 - CVE-2024-1086 kernel: nf_tables: use-after-free vulnerability in the nft_verdict_init() function

CVEs

• CVE-2021-33655
• CVE-2022-2196
• CVE-2022-3239
• CVE-2022-3625
• CVE-2022-20368
• CVE-2022-23960
• CVE-2022-29581
• CVE-2022-36402
• CVE-2022-38096
• CVE-2022-38457
• CVE-2022-40133
• CVE-2023-1074
• CVE-2023-6546
• CVE-2023-6931
• CVE-2023-30456
• CVE-2023-31084
• CVE-2023-51042
• CVE-2024-1086

References

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