RHSA-2023:2736 — Security Advisory

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.

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.