SB2025111814 - Ubuntu live patch for Linux kernel

Description

This security bulletin contains information about 7 secuirty vulnerabilities.

1) Input validation error (CVE-ID: CVE-2024-50299)

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

The vulnerability exists due to improper input validation within the sctp_sf_ootb() function in net/sctp/sm_statefuns.c. A local user can perform a denial of service (DoS) attack.

2) Race condition (CVE-ID: CVE-2025-38352)

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

The vulnerability exists due to a race condition within the run_posix_cpu_timers() function in kernel/time/posix-cpu-timers.c. A local user can escalate privileges on the system.

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

3) Use-after-free (CVE-ID: CVE-2025-21727)

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

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

4) NULL pointer dereference (CVE-ID: CVE-2024-53217)

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

The vulnerability exists due to NULL pointer dereference within the nfsd4_process_cb_update() function in fs/nfsd/nfs4callback.c. A local user can perform a denial of service (DoS) attack.

5) Use-after-free (CVE-ID: CVE-2024-53171)

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

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

6) Out-of-bounds read (CVE-ID: CVE-2024-53150)

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 DESC_LENGTH_CHECK(), validate_clock_source() and validate_clock_selector() functions in sound/usb/clock.c. A local user can perform a denial of service (DoS) attack.

7) Double free (CVE-ID: CVE-2023-52664)

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

The vulnerability exists due to a double free error within the aq_vec_ring_alloc() function in drivers/net/ethernet/aquantia/atlantic/aq_vec.c, within the aq_get_rxpages(), aq_ring_alloc(), aq_ring_rx_alloc() and aq_ring_hwts_rx_alloc() functions in drivers/net/ethernet/aquantia/atlantic/aq_ring.c, within the aq_ptp_ring_alloc() function in drivers/net/ethernet/aquantia/atlantic/aq_ptp.c. A local user can perform a denial of service (DoS) attack.

Remediation

Install update from vendor's website.

References

• https://ubuntu.com/security/notices/LSN-0116-1