SB2020031637 - Ubuntu update for linux-aws-5.0, linux-azure, linux-gcp and more
Published: March 16, 2020 Updated: October 31, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 8 vulnerabilities.
1) Memory leak (CVE-ID: CVE-2019-19053)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the "rpmsg_eptdev_write_iter()" function in "drivers/rpmsg/rpmsg_char.c" file. A local attacker can cause a denial of service condition (memory consumption) by triggering "copy_from_iter_full()" failures.
2) Memory leak (CVE-ID: CVE-2019-19056)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the "mwifiex_pcie_alloc_cmdrsp_buf()" function in "drivers/net/wireless/marvell/mwifiex/pcie.c" file. A remote attacker on the local network can cause a denial of service condition (memory consumption) by triggering "mwifiex_map_pci_memory()" failures.
3) Memory leak (CVE-ID: CVE-2019-19058)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the "alloc_sgtable()" function in "drivers/net/wireless/intel/iwlwifi/fw/dbg.c" file. A remote attacker on the local network can cause a denial of service (memory consumption) by triggering "alloc_page()" failures.
4) Memory leak (CVE-ID: CVE-2019-19059)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the "iwl_pcie_ctxt_info_gen3_init()" function in "drivers/net/wireless/intel/iwlwifi/pcie/ctxt-info-gen3.c" file. A remote attacker on the local network can cause a denial of service condition (memory consumption) by triggering "iwl_pcie_init_fw_sec() or dma_alloc_coherent()" failures.
5) Memory leak (CVE-ID: CVE-2019-19066)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 6.9 [CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a local attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the "bfad_im_get_stats()" function in "drivers/scsi/bfa/bfad_attr.c" file. A local attacker can cause a denial of service condition (memory consumption) by triggering "bfa_port_get_stats()" failures.
6) Memory leak (CVE-ID: CVE-2019-19068)
CWE-ID: CWE-401 - Missing release of memory after effective lifetime
CVSSv4: 7.1 [CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to memory leak within the "rtl8xxxu_submit_int_urb()" function in "drivers/net/wireless/realtek/rtl8xxxu/rtl8xxxu_core.c" file. A remote attacker on the local network can cause a denial of service (memory consumption) by triggering "usb_submit_urb()" failures.
7) Race condition (CVE-ID: CVE-2019-3016)
CWE-ID: CWE-362 - Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVSSv4: 5.7 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a local authenticated user to gain access to sensitive information.
In a Linux KVM guest that has PV TLB enabled, a process in the guest kernel may be able to read memory locations from another process in the same guest. This problem is limit to the host running linux kernel 4.10 with a guest running linux kernel 4.16 or later. The problem mainly affects AMD processors but Intel CPUs cannot be ruled out.
8) Information disclosure (CVE-ID: CVE-2020-2732)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: 5.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
The vulnerability allows a remote attacker to gain access to potentially sensitive information.
The vulnerability exists due to incomplete implementation of vmx_check_intercept on Intel processors in KVM in Linux kernel, which leads to I/O or MSR interception bitmaps are not checked. A remote attacker with access to guest operating system (e.g. L2 guest) can trick the L0 hypervisor into accessing sensitive information on the L1 hypervisor.
Remediation
Install update from vendor's website.