RHSA-2021:2725: Important: kernel security and bug fix update

First published: Tue Jul 20 2021(Updated: )

The kernel packages contain the Linux kernel, the core of any Linux operating system.<br>Security Fix(es):<br><li> kernel: size_t-to-int conversion vulnerability in the filesystem layer (CVE-2021-33909)</li> <li> kernel: use-after-free in net/bluetooth/hci_event.c when destroying an hci_chan (CVE-2021-33034)</li> <li> kernel: use-after-free in show_numa_stats function (CVE-2019-20934)</li> <li> kernel: mishandles invalid descriptors in drivers/media/usb/gspca/xirlink_cit.c (CVE-2020-11668)</li> <li> kernel: use-after-free in cipso_v4_genopt in net/ipv4/cipso_ipv4.c (CVE-2021-33033)</li> 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.<br>Bug Fix(es):<br><li> [RHEL7.9.z] n_tty_open: "BUG: unable to handle kernel paging request" (BZ#1872778)</li> <li> [ESXi][RHEL7.8]"qp_alloc_hypercall result = -20" / "Could not attach to queue pair with -20" with vSphere Fault Tolerance enabled (BZ#1892237)</li> <li> [RHEL7.9][s390x][Regression] Sino Nomine swapgen IBM z/VM emulated DASD with DIAG driver returns EOPNOTSUPP (BZ#1910395)</li> <li> False-positive hard lockup detected while processing the thread state information (SysRq-T) (BZ#1912221)</li> <li> RHEL7.9 zstream - s390x LPAR with NVMe SSD will panic when it has 32 or more IFL (pci) (BZ#1917943)</li> <li> The NMI watchdog detected a hard lockup while printing RCU CPU stall warning messages to the serial console (BZ#1924688)</li> <li> nvme hangs when trying to allocate reserved tag (BZ#1926825)</li> <li> [REGRESSION] "call into AER handling regardless of severity" triggers do_recovery() unnecessarily on correctable PCIe errors (BZ#1933663)</li> <li> Module nvme_core: A double free of the kmalloc-512 cache between nvme_trans_log_temperature() and nvme_get_log_page(). (BZ#1946793)</li> <li> sctp - SCTP_CMD_TIMER_START queues active timer kernel BUG at kernel/timer.c:1000! (BZ#1953052)</li> <li> [Hyper-V][RHEL-7]When CONFIG_NET_POLL_CONTROLLER is set, mainline commit 2a7f8c3b1d3fee is needed (BZ#1953075)</li> <li> Kernel panic at cgroup_is_descendant (BZ#1957719)</li> <li> [Hyper-V][RHEL-7]Commits To Fix Kdump Failures (BZ#1957803)</li> <li> IGMPv2 JOIN packets incorrectly routed to loopback (BZ#1958339)</li> <li> [CKI kernel builds]: x86 binaries in non-x86 kernel rpms breaks systemtap [7.9.z] (BZ#1960193)</li> <li> mlx4: Fix memory allocation in mlx4_buddy_init needed (BZ#1962406)</li> <li> incorrect assertion on pi_state-&gt;pi_mutex.wait_lock from pi_state_update_owner() (BZ#1965495)</li>

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