SB2021042857 - SUSE update for the Linux Kernel (Live Patch 17 for SLE 15 SP1)
Published: April 28, 2021
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 secuirty vulnerabilities.
1) Resource management error (CVE-ID: CVE-2021-26930)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to improper management of internal resources when processing service requests to the PV backend within drivers/block/xen-blkback/blkback.c driver in Xen. A local user on the guest OS can perform a denial of service (DoS) attack.
2) Allocation of resources without limits or throttling (CVE-ID: CVE-2021-26931)
The vulnerability allows a local user to perform a denial of service (DoS) attack.
The vulnerability exists due to allocation of resources without limits or throttling error within the scsiback_gnttab_data_map_batch() function in drivers/xen/xen-scsiback.c. A local user can perform a denial of service (DoS) attack.
3) Out-of-bounds write (CVE-ID: CVE-2021-28660)
The vulnerability allows a local user to compromise vulnerable system.
The vulnerability exists due to a boundary error when processing untrusted input in the "rtw_wx_set_scan" in drivers/staging/rtl8188eu/os_dep/ioctl_linux.c. A local user can trigger out-of-bounds write and execute arbitrary code on the target system.
4) Improper Initialization (CVE-ID: CVE-2021-28688)
The vulnerability allows a local user to perform a denial of service attack.
The vulnerability exists due to improper initialization of pointers such that subsequent cleanup code wouldn't use uninitialized or stale values. A local user can perform a denial of service attack.
5) Out-of-bounds read (CVE-ID: CVE-2021-3444)
The vulnerability allows a local user to execute arbitrary code.
The vulnerability exists due to an out-of-bounds read error within the fixup_bpf_calls() function in kernel/bpf/verifier.c. A local user can execute arbitrary code.
Remediation
Install update from vendor's website.