SB2026040845 - Red Hat Enterprise Linux 8 update for kernel
Published: April 8, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 6 secuirty vulnerabilities.
1) Out-of-bounds read (CVE-ID: CVE-2022-49674)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to an out-of-bounds read error within the validate_region_size(), validate_raid_redundancy(), __rdev_sectors() and raid_iterate_devices() functions in drivers/md/dm-raid.c. A local user can perform a denial of service (DoS) attack.
2) Use-after-free (CVE-ID: CVE-2025-38180)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the lec_itf_walk(), lec_seq_start() and lec_seq_stop() functions in net/atm/lec.c. A local user can escalate privileges on the system.
3) Incorrect calculation (CVE-ID: CVE-2021-4460)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to incorrect calculation within the set_sched_resources() and initialize_cpsch() functions in drivers/gpu/drm/amd/amdkfd/kfd_device_queue_manager.c. A local user can perform a denial of service (DoS) attack.
4) NULL pointer dereference (CVE-ID: CVE-2025-40240)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the sctp_inq_pop() function in net/sctp/inqueue.c. A local user can perform a denial of service (DoS) attack.
5) Resource management error (CVE-ID: CVE-2025-71085)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to resource management error within the calipso_skbuff_setattr() function in net/ipv6/calipso.c. A local user can perform a denial of service (DoS) attack.
6) Use-after-free (CVE-ID: CVE-2026-23209)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the macvlan_common_newlink() function in drivers/net/macvlan.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.