RHSA-2023:2736 - Security Advisory

Topic

An update for kernel-rt 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-rt packages provide the Real Time Linux Kernel, which enables fine-tuning for systems with extremely high determinism requirements.

Security Fix(es):

• use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c (CVE-2022-3564)
• net/ulp: use-after-free in listening ULP sockets (CVE-2023-0461)
• hw: cpu: AMD CPUs may transiently execute beyond unconditional direct branch (CVE-2021-26341)
• malicious data for FBIOPUT_VSCREENINFO ioctl may cause OOB write memory (CVE-2021-33655)
• when setting font with malicious data by ioctl PIO_FONT, kernel will write memory out of bounds (CVE-2021-33656)
• possible race condition in drivers/tty/tty_buffers.c (CVE-2022-1462)
• use-after-free in ath9k_htc_probe_device() could cause an escalation of privileges (CVE-2022-1679)
• KVM: NULL pointer dereference in kvm_mmu_invpcid_gva (CVE-2022-1789)
• KVM: nVMX: missing IBPB when exiting from nested guest can lead to Spectre v2 attacks (CVE-2022-2196)
• netfilter: nf_conntrack_irc message handling issue (CVE-2022-2663)
• race condition in xfrm_probe_algs can lead to OOB read/write (CVE-2022-3028)
• media: em28xx: initialize refcount before kref_get (CVE-2022-3239)
• race condition in hugetlb_no_page() in mm/hugetlb.c (CVE-2022-3522)
• memory leak in ipv6_renew_options() (CVE-2022-3524)
• data races around icsk->icsk_af_ops in do_ipv6_setsockopt (CVE-2022-3566)
• data races around sk->sk_prot (CVE-2022-3567)
• memory leak in l2cap_recv_acldata of the file net/bluetooth/l2cap_core.c (CVE-2022-3619)
• denial of service in follow_page_pte in mm/gup.c due to poisoned pte entry (CVE-2022-3623)
• use-after-free after failed devlink reload in devlink_param_get (CVE-2022-3625)
• USB-accessible buffer overflow in brcmfmac (CVE-2022-3628)
• Double-free in split_2MB_gtt_entry when function intel_gvt_dma_map_guest_page failed (CVE-2022-3707)
• l2tp: missing lock when clearing sk_user_data can lead to NULL pointer dereference (CVE-2022-4129)
• igmp: use-after-free in ip_check_mc_rcu when opening and closing inet sockets (CVE-2022-20141)
• Executable Space Protection Bypass (CVE-2022-25265)
• Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP option (CVE-2022-30594)
• unmap_mapping_range() race with munmap() on VM_PFNMAP mappings leads to stale TLB entry (CVE-2022-39188)
• TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning (CVE-2022-39189)
• Report vmalloc UAF in dvb-core/dmxdev (CVE-2022-41218)
• u8 overflow problem in cfg80211_update_notlisted_nontrans() (CVE-2022-41674)
• use-after-free related to leaf anon_vma double reuse (CVE-2022-42703)
• use-after-free in bss_ref_get in net/wireless/scan.c (CVE-2022-42720)
• BSS list corruption in cfg80211_add_nontrans_list in net/wireless/scan.c (CVE-2022-42721)
• Denial of service in beacon protection for P2P-device (CVE-2022-42722)
• memory corruption in usbmon driver (CVE-2022-43750)
• NULL pointer dereference in traffic control subsystem (CVE-2022-47929)
• NULL pointer dereference in rawv6_push_pending_frames (CVE-2023-0394)
• use-after-free caused by invalid pointer hostname in fs/cifs/connect.c (CVE-2023-1195)
• Soft lockup occurred during __page_mapcount (CVE-2023-1582)
• slab-out-of-bounds read vulnerabilities in cbq_classify (CVE-2023-23454)

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.

Additional Changes:

For detailed information on changes in this release, see the Red Hat Enterprise Linux 8.8 Release Notes linked from the References section.

Solution

Before applying this update, make sure all previously released errata
relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

• Red Hat Enterprise Linux for Real Time 8 x86_64
• Red Hat Enterprise Linux for Real Time for NFV 8 x86_64
• Red Hat Enterprise Linux for Real Time - Telecommunications Update Service 8.8 x86_64
• Red Hat Enterprise Linux for Real Time for NFV - Telecommunications Update Service 8.8 x86_64

Fixes

• BZ - 2055499 - CVE-2022-25265 kernel: Executable Space Protection Bypass
• BZ - 2061703 - CVE-2021-26341 hw: cpu: AMD CPUs may transiently execute beyond unconditional direct branch
• BZ - 2078466 - CVE-2022-1462 kernel: possible race condition in drivers/tty/tty_buffers.c
• BZ - 2084125 - CVE-2022-1679 kernel: use-after-free in ath9k_htc_probe_device() could cause an escalation of privileges
• BZ - 2085300 - CVE-2022-30594 kernel: Unprivileged users may use PTRACE_SEIZE to set PTRACE_O_SUSPEND_SECCOMP option
• BZ - 2090723 - CVE-2022-1789 kernel: KVM: NULL pointer dereference in kvm_mmu_invpcid_gva
• BZ - 2108691 - CVE-2021-33655 kernel: malicious data for FBIOPUT_VSCREENINFO ioctl may cause OOB write memory
• BZ - 2108696 - CVE-2021-33656 kernel: when setting font with malicious data by ioctl PIO_FONT, kernel will write memory out of bounds
• BZ - 2114937 - CVE-2022-20141 kernel: igmp: use-after-free in ip_check_mc_rcu when opening and closing inet sockets
• BZ - 2122228 - CVE-2022-3028 kernel: race condition in xfrm_probe_algs can lead to OOB read/write
• BZ - 2122960 - CVE-2022-41218 kernel: Report vmalloc UAF in dvb-core/dmxdev
• BZ - 2123056 - CVE-2022-2663 kernel: netfilter: nf_conntrack_irc message handling issue
• BZ - 2124788 - CVE-2022-39189 kernel: TLB flush operations are mishandled in certain KVM_VCPU_PREEMPTED leading to guest malfunctioning
• BZ - 2127985 - CVE-2022-3239 kernel: media: em28xx: initialize refcount before kref_get
• BZ - 2130141 - CVE-2022-39188 kernel: unmap_mapping_range() race with munmap() on VM_PFNMAP mappings leads to stale TLB entry
• BZ - 2133483 - CVE-2022-42703 kernel: use-after-free related to leaf anon_vma double reuse
• BZ - 2134377 - CVE-2022-41674 kernel: u8 overflow problem in cfg80211_update_notlisted_nontrans()
• BZ - 2134451 - CVE-2022-42720 kernel: use-after-free in bss_ref_get in net/wireless/scan.c
• BZ - 2134506 - CVE-2022-42721 kernel: BSS list corruption in cfg80211_add_nontrans_list in net/wireless/scan.c
• BZ - 2134517 - CVE-2022-42722 kernel: Denial of service in beacon protection for P2P-device
• BZ - 2134528 - CVE-2022-4129 kernel: l2tp: missing lock when clearing sk_user_data can lead to NULL pointer dereference
• BZ - 2137979 - CVE-2022-3707 kernel: Double-free in split_2MB_gtt_entry when function intel_gvt_dma_map_guest_page failed
• BZ - 2143893 - CVE-2022-3566 kernel: data races around icsk->icsk_af_ops in do_ipv6_setsockopt
• BZ - 2143943 - CVE-2022-3567 kernel: data races around sk->sk_prot
• BZ - 2144720 - CVE-2022-3625 kernel: use-after-free after failed devlink reload in devlink_param_get
• BZ - 2150947 - CVE-2022-3524 kernel: memory leak in ipv6_renew_options()
• BZ - 2150960 - CVE-2022-3628 kernel: USB-accessible buffer overflow in brcmfmac
• BZ - 2150979 - CVE-2022-3522 kernel: race condition in hugetlb_no_page() in mm/hugetlb.c
• BZ - 2150999 - CVE-2022-3564 kernel: use-after-free caused by l2cap_reassemble_sdu() in net/bluetooth/l2cap_core.c
• BZ - 2151270 - CVE-2022-43750 kernel: memory corruption in usbmon driver
• BZ - 2154171 - CVE-2023-1195 kernel: use-after-free caused by invalid pointer hostname in fs/cifs/connect.c
• BZ - 2154235 - CVE-2022-3619 kernel: memory leak in l2cap_recv_acldata of the file net/bluetooth/l2cap_core.c
• BZ - 2160023 - CVE-2022-2196 kernel: KVM: nVMX: missing IBPB when exiting from nested guest can lead to Spectre v2 attacks
• BZ - 2162120 - CVE-2023-0394 kernel: NULL pointer dereference in rawv6_push_pending_frames
• BZ - 2165721 - CVE-2022-3623 kernel: denial of service in follow_page_pte in mm/gup.c due to poisoned pte entry
• BZ - 2168246 - CVE-2022-47929 kernel: NULL pointer dereference in traffic control subsystem
• BZ - 2168297 - CVE-2023-23454 kernel: slab-out-of-bounds read vulnerabilities in cbq_classify
• BZ - 2176192 - CVE-2023-0461 kernel: net/ulp: use-after-free in listening ULP sockets
• BZ - 2180936 - CVE-2023-1582 kernel: Soft lockup occurred during __page_mapcount

CVEs

• CVE-2021-26341
• CVE-2021-33655
• CVE-2021-33656
• CVE-2021-47592
• CVE-2022-1462
• CVE-2022-1679
• CVE-2022-1789
• CVE-2022-2196
• CVE-2022-2663
• CVE-2022-3028
• CVE-2022-3239
• CVE-2022-3522
• CVE-2022-3524
• CVE-2022-3564
• CVE-2022-3566
• CVE-2022-3567
• CVE-2022-3619
• CVE-2022-3623
• CVE-2022-3625
• CVE-2022-3628
• CVE-2022-3707
• CVE-2022-4129
• CVE-2022-4662
• CVE-2022-20141
• CVE-2022-25265
• CVE-2022-30594
• CVE-2022-36879
• CVE-2022-39188
• CVE-2022-39189
• CVE-2022-41218
• CVE-2022-41674
• CVE-2022-42703
• CVE-2022-42720
• CVE-2022-42721
• CVE-2022-42722
• CVE-2022-43750
• CVE-2022-47929
• CVE-2022-48695
• CVE-2023-0394
• CVE-2023-0461
• CVE-2023-1095
• CVE-2023-1195
• CVE-2023-1582
• CVE-2023-2177
• CVE-2023-22998
• CVE-2023-23454

References

• https://access.redhat.com/security/updates/classification/#important
• https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/8.8_release_notes/index