SB2025082019 - Ubuntu live patch for Linux kernel

Description

This security bulletin contains information about 8 secuirty vulnerabilities.

1) 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.

2) Use-after-free (CVE-ID: CVE-2025-21887)

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

The vulnerability exists due to a use-after-free error within the ovl_link_up() function in fs/overlayfs/copy_up.c. A local user can escalate privileges on the system.

3) Out-of-bounds write (CVE-ID: CVE-2024-53197)

The vulnerability allows a local user to compromise the affected system.

The vulnerability exists due to an out-of-bounds write error within the snd_usb_create_quirk(), snd_usb_extigy_boot_quirk(), mbox2_setup_48_24_magic() and snd_usb_mbox2_boot_quirk() functions in sound/usb/quirks.c. A local user can trigger an out-of-bounds write and execute arbitrary code on the system.

Note, the vulnerability is being actively exploited against Android devices.

4) Use-after-free (CVE-ID: CVE-2024-49883)

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

The vulnerability exists due to a use-after-free error within the fs/ext4/extents.c. A local user can escalate privileges on the system.

5) Use-after-free (CVE-ID: CVE-2023-52885)

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

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

6) Use-after-free (CVE-ID: CVE-2022-49909)

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

The vulnerability exists due to a use-after-free error within the l2cap_data_channel() function in net/bluetooth/l2cap_core.c. A local user can escalate privileges on the system.

7) Use-after-free (CVE-ID: CVE-2022-49179)

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

The vulnerability exists due to a use-after-free error within the bfq_bfqq_move() function in block/bfq-cgroup.c. A local user can escalate privileges on the system.

8) Use-after-free (CVE-ID: CVE-2022-49176)

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

The vulnerability exists due to a use-after-free error within the bfq_dispatch_request() function in block/bfq-iosched.c. A local user can escalate privileges on the system.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/LSN-0114-1