Note:
This project will be discontinued after December 13, 2021. [more]
Product:
Ubuntu_linux
(Canonical)| Date | Id | Summary | Products | Score | Patch | Annotated |
|---|---|---|---|---|---|---|
| 2021-01-14 | CVE-2020-16119 | Use-after-free vulnerability in the Linux kernel exploitable by a local attacker due to reuse of a DCCP socket with an attached dccps_hc_tx_ccid object as a listener after being released. Fixed in Ubuntu Linux kernel 5.4.0-51.56, 5.3.0-68.63, 4.15.0-121.123, 4.4.0-193.224, 3.13.0.182.191 and 3.2.0-149.196. | Ubuntu_linux, Debian_linux, Linux_kernel | 7.8 | ||
| 2021-02-10 | CVE-2020-16120 | Overlayfs did not properly perform permission checking when copying up files in an overlayfs and could be exploited from within a user namespace, if, for example, unprivileged user namespaces were allowed. It was possible to have a file not readable by an unprivileged user to be copied to a mountpoint controlled by the user, like a removable device. This was introduced in kernel version 4.19 by commit d1d04ef ("ovl: stack file ops"). This was fixed in kernel version 5.8 by commits 56230d9... | Ubuntu_linux, Linux_kernel | 4.4 | ||
| 2021-03-07 | CVE-2021-27364 | An issue was discovered in the Linux kernel through 5.11.3. drivers/scsi/scsi_transport_iscsi.c is adversely affected by the ability of an unprivileged user to craft Netlink messages. | Ubuntu_linux, Debian_linux, Linux_kernel, Solidfire_baseboard_management_controller_firmware, Tekelec_platform_distribution | 7.1 | ||
| 2021-03-20 | CVE-2020-27170 | An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c performs undesirable out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-f232326f6966. This affects pointer types that do not define a ptr_limit. | Ubuntu_linux, Debian_linux, Fedora, Linux_kernel | 4.7 | ||
| 2021-03-20 | CVE-2020-27171 | An issue was discovered in the Linux kernel before 5.11.8. kernel/bpf/verifier.c has an off-by-one error (with a resultant integer underflow) affecting out-of-bounds speculation on pointer arithmetic, leading to side-channel attacks that defeat Spectre mitigations and obtain sensitive information from kernel memory, aka CID-10d2bb2e6b1d. | Ubuntu_linux, Debian_linux, Fedora, Linux_kernel | 6.0 | ||
| 2021-03-23 | CVE-2021-3444 | The bpf verifier in the Linux kernel did not properly handle mod32 destination register truncation when the source register was known to be 0. A local attacker with the ability to load bpf programs could use this gain out-of-bounds reads in kernel memory leading to information disclosure (kernel memory), and possibly out-of-bounds writes that could potentially lead to code execution. This issue was addressed in the upstream kernel in commit 9b00f1b78809 ("bpf: Fix truncation handling for... | Ubuntu_linux, Debian_linux, Linux_kernel | 7.8 | ||
| 2021-04-17 | CVE-2021-3492 | Shiftfs, an out-of-tree stacking file system included in Ubuntu Linux kernels, did not properly handle faults occurring during copy_from_user() correctly. These could lead to either a double-free situation or memory not being freed at all. An attacker could use this to cause a denial of service (kernel memory exhaustion) or gain privileges via executing arbitrary code. AKA ZDI-CAN-13562. | Ubuntu_linux | 7.8 | ||
| 2021-04-17 | CVE-2021-3493 | The overlayfs implementation in the linux kernel did not properly validate with respect to user namespaces the setting of file capabilities on files in an underlying file system. Due to the combination of unprivileged user namespaces along with a patch carried in the Ubuntu kernel to allow unprivileged overlay mounts, an attacker could use this to gain elevated privileges. | Ubuntu_linux | 7.8 | ||
| 2021-04-26 | CVE-2020-15078 | OpenVPN 2.5.1 and earlier versions allows a remote attackers to bypass authentication and access control channel data on servers configured with deferred authentication, which can be used to potentially trigger further information leaks. | Ubuntu_linux, Debian_linux, Fedora, Openvpn | 7.5 | ||
| 2021-06-04 | CVE-2021-3489 | The eBPF RINGBUF bpf_ringbuf_reserve() function in the Linux kernel did not check that the allocated size was smaller than the ringbuf size, allowing an attacker to perform out-of-bounds writes within the kernel and therefore, arbitrary code execution. This issue was fixed via commit 4b81ccebaeee ("bpf, ringbuf: Deny reserve of buffers larger than ringbuf") (v5.13-rc4) and backported to the stable kernels in v5.12.4, v5.11.21, and v5.10.37. It was introduced via 457f44363a88 ("bpf: Implement... | Ubuntu_linux, Linux_kernel | 7.8 |