SB2025082703 - Red Hat Enterprise Linux 9 update for kernel
Published: August 27, 2025
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Use-after-free (CVE-ID: CVE-2025-21867)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the bpf_test_init() function in net/bpf/test_run.c. A local user can escalate privileges on the system.
2) Use-after-free (CVE-ID: CVE-2025-38079)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the hash_accept() function in crypto/algif_hash.c. A local user can escalate privileges on the system.
3) NULL pointer dereference (CVE-ID: CVE-2022-49977)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to NULL pointer dereference within the ftrace_startup() function in kernel/trace/ftrace.c. A local user can perform a denial of service (DoS) attack.
4) Input validation error (CVE-ID: CVE-2025-38177)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper input validation within the eltree_insert() and hfsc_qlen_notify() functions in net/sched/sch_hfsc.c. A local user can perform a denial of service (DoS) attack.
5) Use-after-free (CVE-ID: CVE-2025-38350)
The vulnerability allows a local user to escalate privileges on the system.
The vulnerability exists due to a use-after-free error within the qdisc_alloc_handle() and qdisc_tree_reduce_backlog() functions in net/sched/sch_api.c. A local user can escalate privileges on the system.
Remediation
Install update from vendor's website.