QID 174916

The SUSE Linux Enterprise 12 SP5 kernel was updated to receive various
security and bugfixes.

The following security bugs were fixed:

- CVE-2021-3444: Fixed an issue with the bpf verifier which did not
properly handle mod32 destination register truncation when the source
register was known to be 0 leading to out of bounds read (bsc#1184170).
- CVE-2021-3428: Fixed an integer overflow in ext4_es_cache_extent
(bsc#1173485).
- CVE-2021-29647: Fixed an issue in qrtr_recvmsg which could have allowed
attackers to obtain sensitive information from kernel memory because of
a partially uninitialized data structure (bsc#1184192 ).
- CVE-2021-29265: Fixed an issue in usbip_sockfd_store which could have
allowed attackers to cause a denial of service due to race conditions
during an update of the local and shared status (bsc#1184167).
- CVE-2021-29264: Fixed an issue in the Freescale Gianfar Ethernet driver
which could have allowed attackers to cause a system crash due to a
calculation of negative fragment size (bsc#1184168).
- CVE-2021-28972: Fixed a user-tolerable buffer overflow when writing a
new device name to the driver from userspace, allowing userspace to
write data to the kernel stack frame directly (bsc#1184198).
- CVE-2021-28971: Fixed an issue in intel_pmu_drain_pebs_nhm which could
have caused a system crash because the PEBS status in a PEBS record was
mishandled (bsc#1184196 ).
- CVE-2021-28964: Fixed a race condition in get_old_root which could have
allowed attackers to cause a denial of service (bsc#1184193).
- CVE-2021-28688: Fixed an issue introduced by XSA-365 (bsc#1183646).
- CVE-2021-28660: Fixed an out of bounds write in rtw_wx_set_scan
(bsc#1183593 ).
- CVE-2021-28038: Fixed an issue with the netback driver which was lacking
necessary treatment of errors such as failed memory allocations
(bsc#1183022).
- CVE-2021-27365: Fixed an issue where an unprivileged user can send a
Netlink message that is associated with iSCSI, and has a length up to
the maximum length of a Netlink message (bsc#1182715).
- CVE-2021-27364: Fixed an issue where an attacker could craft Netlink
messages (bsc#1182717).
- CVE-2021-27363: Fixed a kernel pointer leak which could have been used
to determine the address of the iscsi_transport structure (bsc#1182716).
- CVE-2021-26932: Fixed improper error handling issues in Linux grant
mapping (XSA-361 bsc#1181747).
- CVE-2021-26931: Fixed an issue where Linux kernel was treating grant
mapping errors as bugs (XSA-362 bsc#1181753).
- CVE-2021-26930: Fixed an improper error handling in blkback's grant
mapping (XSA-365 bsc#1181843).
- CVE-2020-35519: Fixed an out-of-bounds memory access was found in
x25_bind (bsc#1183696).
- CVE-2020-29368,CVE-2020-29374: Fixed an issue in copy-on-write
implementation which could have granted unintended write access
(bsc#1179660, bsc#1179428).
- CVE-2020-27815: Fixed an issue in JFS filesystem where could have
allowed an attacker to execute code (bsc#1179454).
- CVE-2020-27171: Fixed an off-by-one error affecting out-of-bounds
speculation on pointer arithmetic, leading to side-channel attacks that
defeat Spectre mitigations and obtain sensitive information from kernel
memory (bsc#1183775).
- CVE-2020-27170: Fixed potential side-channel attacks that defeat Spectre
mitigations and obtain sensitive information from kernel memory
(bsc#1183686).
- CVE-2020-0433: Fixed a use after free due to improper locking which
could have led to local escalation of privilege (bsc#1176720).
- CVE-2021-3483: Fixed a use-after-free in nosy.c (bsc#1184393).

Successful exploitation allows attacker to compromise the system.