SB2025071026 - Ubuntu update for linux-azure

Description

This security bulletin contains information about 7 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2025-38001)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the cl_in_el_or_vttree(), hfsc_change_class() and hfsc_enqueue() functions in net/sched/sch_hfsc.c. A local user can escalate privileges on the system.

2) Use-after-free (CVE-ID: CVE-2025-38000)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the hfsc_enqueue() function in net/sched/sch_hfsc.c. A local user can escalate privileges on the system.

3) Improper locking (CVE-ID: CVE-2025-37997)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper locking within the net/netfilter/ipset/ip_set_hash_gen.h. A local user can perform a denial of service (DoS) attack.

4) Resource management error (CVE-ID: CVE-2025-37932)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to resource management error within the htb_qlen_notify() function in net/sched/sch_htb.c. A local user can perform a denial of service (DoS) attack.

5) Use-after-free (CVE-ID: CVE-2025-37890)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the hfsc_enqueue() function in net/sched/sch_hfsc.c. A local user can escalate privileges on the system.

6) Input validation error (CVE-ID: CVE-2025-37798)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to improper input validation within the qdisc_bstats_update() function in net/sched/sch_fq_codel.c, within the codel_qdisc_dequeue() function in net/sched/sch_codel.c. A local user can perform a denial of service (DoS) attack.

7) Use-after-free (CVE-ID: CVE-2025-22088)

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to a use-after-free error within the erdma_cancel_mpatimer() function in drivers/infiniband/hw/erdma/erdma_cm.c. A local user can escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/USN-7609-4