SB2022111558 - Red Hat Enterprise Linux 9 update for kernel-rt
Published: November 15, 2022 Updated: June 26, 2024
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 31 secuirty vulnerabilities.
1) Information disclosure (CVE-ID: CVE-2022-21123)
The vulnerability allows an attacker to gain access to potentially sensitive information.
The vulnerability exists in Intel processors due to excessive data output when DirectPath I/O (PCI-Passthrough) is utilized. An attacker (both local and remote) with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can obtain information stored in physical memory about the hypervisor or other virtual machines that reside on the same host.
2) Out-of-bounds read (CVE-ID: CVE-2022-39190)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to an out-of-bounds read error within the net/netfilter/nf_tables_api.c in the Linux kernel. A local user can bind to an already bound chain and crash the kernel.
3) Input validation error (CVE-ID: CVE-2022-36946)
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to insufficient validation of user-supplied input within the nfqnl_mangle() function in net/netfilter/nfnetlink_queue.c in the Linux kernel when processing IPv6 packets. A remote attacker can send specially crafted packets to the system and perform a denial of service (DoS) attack.
4) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-29901)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to the way non-transparent sharing of branch predictor targets between contexts. A local user can exploit the vulnerability to gain access to sensitive information.
5) Processor optimization removal or modification of security-critical code (CVE-ID: CVE-2022-29900)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a mistrained branch predictions for return instructions. A local user can execute arbitrary speculative code under certain microarchitecture-dependent conditions. The vulnerability was dubbed RETbleed.
6) Improper update of reference count (CVE-ID: CVE-2022-29581)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to improper update of reference count in net/sched in Linux kernel. A local user can execute arbitrary code with root privileges.
7) Use-after-free (CVE-ID: CVE-2022-28893)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the SUNRPC subsystem in the Linux kernel. A local user can trigger a use-after-free error and execute arbitrary code with elevated privileges.
8) Double Free (CVE-ID: CVE-2022-28390)
The vulnerability allows a local user to execute arbitrary code with elevated privileges.
The vulnerability exists due to boundary error in ems_usb_start_xmit in drivers/net/can/usb/ems_usb.c. A local user can pass specially crafted data to the application, trigger double free error and execute arbitrary code with elevated privileges.
9) Security restrictions bypass (CVE-ID: CVE-2022-26373)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to non-transparent sharing of return predictor targets between contexts in Intel CPU processors. A local user can bypass the expected architecture isolation between contexts and gain access to sensitive information on the system.
10) Missing initialization of resource (CVE-ID: CVE-2022-24448)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to missing initialization of resource within the fs/nfs/dir.c in the Linux kernel. If an application sets the O_DIRECTORY flag, and tries to open a regular file, nfs_atomic_open() performs a regular lookup. If a regular file is found, ENOTDIR should occur, but the server instead returns uninitialized data in the file descriptor.
11) Type Confusion (CVE-ID: CVE-2022-23825)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a branch type confusion. A local user can force the branch predictor to predict the wrong branch type and gain access to sensitive information.
12) Type Confusion (CVE-ID: CVE-2022-23816)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a branch type confusion. A local user can force the branch predictor to predict the wrong branch type and gain access to sensitive information.
13) Improper access control (CVE-ID: CVE-2022-21499)
The vulnerability allows a local user to bypass implemented security restrictions.
The vulnerability exists due to improper access restrictions to the kernel debugger when booted in secure boot environments. A local privileged user can bypass UEFI Secure Boot restrictions.
14) Information disclosure (CVE-ID: CVE-2022-21166)
The vulnerability allows an attacker to gain access to potentially sensitive information.
The vulnerability exists in Intel processors due to excessive data output when DirectPath I/O (PCI-Passthrough) is utilized. An attacker (both local and remote) with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can obtain information stored in physical memory about the hypervisor or other virtual machines that reside on the same host.
15) Information disclosure (CVE-ID: CVE-2022-21125)
The vulnerability allows an attacker to gain access to potentially sensitive information.
The vulnerability exists in Intel processors due to excessive data output when DirectPath I/O (PCI-Passthrough) is utilized. An attacker (both local and remote) with administrative access to a virtual machine that has an attached DirectPath I/O (PCI-Passthrough) device can obtain information stored in physical memory about the hypervisor or other virtual machines that reside on the same host.
16) Out-of-bounds read (CVE-ID: CVE-2022-20368)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a boundary condition within the packet_recvmsg() function in Linux kernel. A local user can trigger an out-of-bounds read error and potentially escalate privileges on the system.
17) Use of a broken or risky cryptographic algorithm (CVE-ID: CVE-2020-36516)
The vulnerability allows a remote attacker to perform a denial of service (DoS) or MitM attacks.
The vulnerability exists due to an error in the mixed IPID assignment method with the hash-based IPID assignment policy in Linux kernel. A remote attacker can inject data into a victim's TCP session or terminate that session.
18) Integer underflow (CVE-ID: CVE-2022-2639)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to integer underflow within the reserve_sfa_size() function in the openvswitch kernel module in Linux kernel. A local user can trigger an out-of-bounds read error and crash the system or escalate privileges.
19) Use-after-free (CVE-ID: CVE-2022-2586)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the the netfilter subsystem implementation in Linux kernel when preventing one nft object from referencing an nft set in another nft table. A local user can trigger a use-after-free error and execute arbitrary code on the system with elevated privileges.
20) Use-after-free (CVE-ID: CVE-2022-1998)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the copy_event_to_user() function in Linux kernel. A local user can trigger a use-after-free error and escalate privileges on the system.
21) NULL pointer dereference (CVE-ID: CVE-2022-1852)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Linux kernel’s KVM module. A local user can perform a denial of service (DoS) attack in the x86_emulate_insn in arch/x86/kvm/emulate.c.
22) Use-after-free (CVE-ID: CVE-2022-1679)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the ath9k_htc_wait_for_target() function in the Linux kernel’s Atheros wireless adapter driver. A local user can execute arbitrary code with elevated privileges.
23) Information disclosure (CVE-ID: CVE-2022-1353)
The vulnerability allows a local user to gain access to potentially sensitive information.
The vulnerability exists due to excessive data output by the application in the pfkey_register function in net/key/af_key.c in the Linux kernel. A local user can gain unauthorized access to kernel memory, leading to a system crash or a leak of internal kernel information.
24) Use-after-free (CVE-ID: CVE-2022-1280)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a use-after-free error within the drm_lease_held() function in drivers/gpu/drm/drm_lease.c in the Linux kernel. A local user can run a specially crafted program to trigger a use-after-free error and crash the kernel or gain access to sensitive information.
25) Use-after-free (CVE-ID: CVE-2022-1184)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to a use-after-free error in fs/ext4/namei.c:dx_insert_block() function in the Linux kernel’s filesystem sub-component.. A local user can trigger use-after-free and perform a denial of service attack.
26) Use-after-free (CVE-ID: CVE-2022-1048)
The vulnerability allows a local user to execute arbitrary code with elevated privileges.
The vulnerability exists due to a use-after-free error in the Linux kernel’s sound subsystem in the way a user triggers concurrent calls of PCM hw_params. A local user can execute arbitrary code with elevated privileges and perform a denial-of-service attack.
27) Use-after-free (CVE-ID: CVE-2022-1016)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due to a use-after-free error in net/netfilter/nf_tables_core.c:nft_do_chain in Linux kernel.. A local user can trigger a use-after-free error and gain access to sensitive information.
28) Memory leak (CVE-ID: CVE-2022-0854)
The vulnerability allows a local user to gain access to sensitive information.
The vulnerability exists due memory leak in the Linux kernel’s DMA subsystem when processing DMA_FROM_DEVICE calls. A local user can trigger a memory leak error and read random memory from the kernel space.
29) NULL pointer dereference (CVE-ID: CVE-2022-0617)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Linux kernel UDF file system functionality. A local user can supply a malicious UDF image to the udf_file_write_iter() function and perform a denial of service (DoS) attack.
30) NULL pointer dereference (CVE-ID: CVE-2022-0168)
The vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to a NULL pointer dereference error in the Linux kernel’s smb2_ioctl_query_info function in the fs/cifs/smb2ops.c Common Internet File System (CIFS). A privileged (CAP_SYS_ADMIN) attacker can perform a denial of service (DoS) attack.
31) Use-after-free (CVE-ID: CVE-2021-3640)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error in sco_sock_sendmsg() function of the Linux kernel HCI subsystem. A privileged local user can call ioct UFFDIO_REGISTER or other way trigger race condition to escalate privileges on the system.
Remediation
Install update from vendor's website.