SB2023041494 - openEuler 22.03 LTS update for kernel

Description

This security bulletin contains information about 5 secuirty vulnerabilities.

1) Use-after-free (CVE-ID: CVE-2023-1611)

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

The vulnerability exists due to a use-after-free error within the btrfs_search_slot() function in fs/btrfs/ctree.c. A local user can trigger a use-after-free error and crash the kernel.

2) Use-after-free (CVE-ID: CVE-2023-1670)

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

The vulnerability exists due to a use-after-free error within the Xircom 16-bit PCMCIA (PC-card) Ethernet driver. A local user can trigger a use-after-free error and execute arbitrary code on the system.

3) Use-after-free (CVE-ID: CVE-2023-1859)

The vulnerability allows a malicious guest to gain access to sensitive information or perform a denial of service (DoS) attack.

The vulnerability exists due to a use-after-free error within the xen_9pfs_front_removet() function in net/9p/trans_xen.c in Xen transport for 9pfs. A malicious guest VM can trigger a use-after-free error and gain access to sensitive information of the hypervisor or crash it.

4) Race condition (CVE-ID: CVE-2023-1582)

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

The vulnerability exists due to a race condition within fs/proc/task_mmu.c. A local user can exploit the race and crash the kernel.

5) Double Free (CVE-ID: CVE-2022-4744)

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

The vulnerability exists due to a boundary error within the tun_free_netdev() function in the Linux kernel’s TUN/TAP device driver. A local user can trigger a double free error and execute arbitrary code with elevated privileges.

Remediation

Install update from vendor's website.

References

• https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2023-1228