kernel-4.18.0-240.22.1.el8_3

The kernel packages contain the Linux kernel, the core of any Linux operating system.

Security Fix(es):

* kernel: use after free in eventpoll.c may lead to escalation of privilege (CVE-2020-0466)
* kernel: SCSI target (LIO) write to any block on ILO backstore (CVE-2020-28374)
* kernel: Use after free via PI futex state (CVE-2021-3347)
* kernel: race conditions caused by wrong locking in net/vmw_vsock/af_vsock.c (CVE-2021-26708)
* kernel: out-of-bounds read in libiscsi module (CVE-2021-27364)
* kernel: heap buffer overflow in the iSCSI subsystem (CVE-2021-27365)
* Kernel: KVM: host stack overflow due to lazy update IOAPIC (CVE-2020-27152)
* kernel: iscsi: unrestricted access to sessions and handles (CVE-2021-27363)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

* race condition when creating child sockets from syncookies
* On System Z, a hash needs state randomized for entropy extraction
* scsi: target: core_tmr_abort_task() reporting multiple aborts for the same se_cmd->tag
* [mlx5] VF interface stats are not reflected in "ip -s link show" / "ifconfig " commands
* Win10 guest automatic reboot after migration in Win10 and WSL2 on Intel hosts
* Repeated messages - Unable to burst-read optrom segment
* Backport bug fix RDMA/umem: Prevent small pages from being returned by ib_umem_find_best_pgsz
* [Cisco 8.3] fNIC driver needs a patch fix that addresses crash
* The kernel misdetects zCX with z/VM
* Backport 22e4663e91 ("mm/slub: fix panic in slab_alloc_node()")
* SCTP "Address already in use" when no active endpoints
* lpfc: Fix initial FLOGI failure due to BBSCN not supported
* [mm] mm, oom: remove oom_lock from oom_reaper
* Unexpected thread movement with AMD Milan compared to Rome
* rpmbuild cannot build the userspace RPMs in the kernel package when the kernel itself is not built
* [Regression] ISST-LTE:pVM:diapvmlp83:sum:memory DLPAR fails to add memory on multiple trials[mm/memory_hotplug.c:1163] (mm-)
* Configuring the system with non-RT kernel will hang the system
* Upstream Patch for Gracefully handle DMAR units with no supported address widthsx86/vt-d
* gfs2: Deadlock between gfs2_{create_inode,inode_lookup} and delete_work_func
* Failing on tsx-ctrl when the flag doesn't change anything

Enhancement(s):

* RFE: Backport all Audit enhancements and fixes up to version 5.10-rc1
* Update the target driver
* [Mellanox 8.4 FEAT] mlx5: Hairpin Support in Switch Mode

CVE-2020-0466
In do_epoll_ctl and ep_loop_check_proc of eventpoll.c, there is a possible use after free due to a logic error. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-147802478References: Upstream kernel
CVE-2020-27152
An issue was discovered in ioapic_lazy_update_eoi in arch/x86/kvm/ioapic.c in the Linux kernel before 5.9.2. It has an infinite loop related to improper interaction between a resampler and edge triggering, aka CID-77377064c3a9.
CVE-2020-28374
In drivers/target/target_core_xcopy.c in the Linux kernel before 5.10.7, insufficient identifier checking in the LIO SCSI target code can be used by remote attackers to read or write files via directory traversal in an XCOPY request, aka CID-2896c93811e3. For example, an attack can occur over a network if the attacker has access to one iSCSI LUN. The attacker gains control over file access because I/O operations are proxied via an attacker-selected backstore.
CVE-2021-26708
A local privilege escalation was discovered in the Linux kernel before 5.10.13. Multiple race conditions in the AF_VSOCK implementation are caused by wrong locking in net/vmw_vsock/af_vsock.c. The race conditions were implicitly introduced in the commits that added VSOCK multi-transport support.
CVE-2021-27363
An issue was discovered in the Linux kernel through 5.11.3. A kernel pointer leak can be used to determine the address of the iscsi_transport structure. When an iSCSI transport is registered with the iSCSI subsystem, the transport's handle is available to unprivileged users via the sysfs file system, at /sys/class/iscsi_transport/$TRANSPORT_NAME/handle. When read, the show_transport_handle function (in drivers/scsi/scsi_transport_iscsi.c) is called, which leaks the handle. This handle is actually the pointer to an iscsi_transport struct in the kernel module's global variables.
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.
CVE-2021-27365
An issue was discovered in the Linux kernel through 5.11.3. Certain iSCSI data structures do not have appropriate length constraints or checks, and can exceed the PAGE_SIZE value. 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.
CVE-2021-3347
An issue was discovered in the Linux kernel through 5.10.11. PI futexes have a kernel stack use-after-free during fault handling, allowing local users to execute code in the kernel, aka CID-34b1a1ce1458.