kernel-4.18.0-425.19.2.el8_7

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

Security Fix(es):

* kernel: stack overflow in do_proc_dointvec and proc_skip_spaces (CVE-2022-4378)
* ALSA: pcm: Move rwsem lock inside snd_ctl_elem_read to prevent UAF (CVE-2023-0266)
* kernel: FUSE filesystem low-privileged user privileges escalation (CVE-2023-0386)
* kernel: net: CPU soft lockup in TC mirred egress-to-ingress action (CVE-2022-4269)

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):

* kernel panic on reboot due to a bug in mei_wdt module (BZ#2139770)
* RHEL8: Practically limit "Dummy wait" workaround to old Intel systems (BZ#2142170)
* AMDSERVER 8.7: amdpstate driver incorrectly designed to load as default for Genoa (BZ#2151275)
* RHEL-8.8: Update RDMA core to Linux v6.0 (BZ#2161750)
* Kernel panic observed during VxFS module unload (BZ#2162763)
* Client not able to connect to rhel server: SYN is answered by chalange ACK and RST is ignored (BZ#2165587)
* RHEL8.4: s390/kexec: fix ipl report address for kdump (BZ#2166296)
* kvm-unit-test reports unhandled exception on AMD (BZ#2166362)
* Windows Server 2019 guest randomly pauses with "KVM: entry failed, hardware error 0x80000021" (BZ#2166368)
* Unable to get QinQ working with ConnectX-4 Lx in SR-IOV scenario (BZ#2166665)
* panic in fib6_rule_suppress+0x22 with custom xdp prog involved in (BZ#2167602)
* net/mlx5e: Fix use-after-free when reverting termination table (BZ#2167640)
* RHEL 8.7: EEH injection failed to recover on Mellanox adapter. (BZ#2167645)
* mlx5: lag and sriov fixes (BZ#2167647)
* RHEL8.4: dasd: fix no record found for raw_track_access (BZ#2167776)
* GSS: Set of fixes in ceph kernel module to prevent OCS node kernel crash - blocklist the kclient when receiving corrupted snap trace (BZ#2168896)
* Azure RHEL8 scsi: storvsc: Fix swiotlb bounce buffer leak in confidential VM (BZ#2170228)
* fast_isolate_freepages scans out of target zone (BZ#2170576)
* Backport Request for locking/rwsem commits (BZ#2170939)
* ipv6 traffic stop when an sriov vf have ipv6 address (BZ#2172550)
* Hyper-V RHEL8.8: Update MANA driver (BZ#2173103)

Enhancement(s):

* Intel 8.8 FEAT SPR CPU: AMX: Improve the init_fpstate setup code (BZ#2168384)

CVE-2022-4269
A flaw was found in the Linux kernel Traffic Control (TC) subsystem. Using a specific networking configuration (redirecting egress packets to ingress using TC action "mirred") a local unprivileged user could trigger a CPU soft lockup (ABBA deadlock) when the transport protocol in use (TCP or SCTP) does a retransmission, resulting in a denial of service condition.
CVE-2022-4378
A stack overflow flaw was found in the Linux kernel's SYSCTL subsystem in how a user changes certain kernel parameters and variables. This flaw allows a local user to crash or potentially escalate their privileges on the system.
CVE-2023-0266
A use after free vulnerability exists in the ALSA PCM package in the Linux Kernel. SNDRV_CTL_IOCTL_ELEM_{READ|WRITE}32 is missing locks that can be used in a use-after-free that can result in a priviledge escalation to gain ring0 access from the system user. We recommend upgrading past commit 56b88b50565cd8b946a2d00b0c83927b7ebb055e
CVE-2023-0386
A flaw was found in the Linux kernel, where unauthorized access to the execution of the setuid file with capabilities was found in the Linux kernel’s OverlayFS subsystem in how a user copies a capable file from a nosuid mount into another mount. This uid mapping bug allows a local user to escalate their privileges on the system.