RHSA-2026:73645HighCVSS 8.8

Red Hat Security Advisory: kernel security, bug fix, and enhancement update

Published
September 30, 2026
Last Modified
October 5, 2026

🔗 CVE IDs covered (14)

CVE-2026-68294 →CVE-2026-72098 →CVE-2026-52993 →CVE-2026-53091 →CVE-2026-53185 →CVE-2026-64191 →CVE-2026-68480 →CVE-2026-74746 →CVE-2022-49670 →CVE-2026-31581 →CVE-2026-52924 →CVE-2026-53002 →CVE-2026-53059 →CVE-2026-53071 →

📋 Description

CVE-2022-49670 — kernel: linux/dim: Fix divide by 0 in RDMA DIM CVE-2026-31581 — kernel: ALSA: 6fire: fix use-after-free on disconnect CVE-2026-52924 — kernel: sctp: purge outqueue on stale COOKIE-ECHO handling CVE-2026-52993 — kernel: tipc: fix double-free in tipc_buf_append() CVE-2026-53002 — kernel: netfilter: conntrack: remove sprintf usage CVE-2026-53059 — kernel: dm log: fix out-of-bounds write due to region_count overflow CVE-2026-53071 — kernel: Bluetooth: l2cap: Add missing chan lock in l2cap_ecred_reconf_rsp CVE-2026-53091 — kernel: net: pull headers in qdisc_pkt_len_segs_init() CVE-2026-53185 — kernel: zram: fix use-after-free in zram_bvec_write_partial() CVE-2026-64191 — kernel: i2c: stub: Reject I2C block transfers with invalid length CVE-2026-68294 — kernel: net: qrtr: restrict socket creation to the initial network namespace CVE-2026-68480 — kernel: AMD-SN-7061: Safe RET Interrupt Vulnerability CVE-2026-72098 — kernel: dm-verity: fix buffer overflow in FEC calculation CVE-2026-74746 — kernel: netfilter: flowtable: publish GC-visible tuple last

🎯 Affected products200

  • Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • Red Hat Enterprise Linux Real Time E4S (v.9.4)
  • Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)
  • bpftool-0:7.3.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-0:7.3.0-427.153.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-0:7.3.0-427.153.1.el9_4.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-0:7.3.0-427.153.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.s390x as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux Real Time E4S (v.9.4)
  • bpftool-debuginfo-0:7.3.0-427.153.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux Real Time for NFV E4S (v.9.4)
  • kernel-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-0:5.14.0-427.153.1.el9_4.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-0:5.14.0-427.153.1.el9_4.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-0:5.14.0-427.153.1.el9_4.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-0:5.14.0-427.153.1.el9_4.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-64k-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-64k-core-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-64k-debug-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-64k-debug-core-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-64k-debug-debuginfo-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • kernel-64k-debug-debuginfo-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.9.4)
  • kernel-64k-debug-devel-0:5.14.0-427.153.1.el9_4.aarch64 as a component of Red Hat Enterprise Linux AppStream E4S (v.9.4)
  • +170 more not shown

✅ Remediation

For details on how to apply this update, which includes the changes described in this advisory, refer to: https://access.redhat.com/articles/11258 The system must be rebooted for this update to take effect. Red Hat recommends treating all kernel errata as security-relevant. Given the kernel's fundamental role, any bug has a higher chance of impacting system security, even if that impact only becomes clear after a fix is published. Therefore, Red Hat prioritizes delivering fixes that improve our customers' overall security posture. Because of this proactive approach, a patch may be associated with a CVE assignment at a future date. Retroactive CVE assignments are always documented in the corresponding errata and on Red Hat's CVE pages. We strongly advise against delaying updates, as doing so may leave your system exposed when protections are already available. Workaround: Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability. Workaround: To mitigate this issue, prevent the snd_usb_6fire module from being loaded. See https://access.redhat.com/solutions/41278 for instructions. Workaround: Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability. Workaround: To mitigate this issue, prevent the nf_conntrack_sip and nf_nat_sip modules from being loaded. See https://access.redhat.com/solutions/41278 for instructions. Workaround: To mitigate this issue, prevent module zram from being loaded. Please see https://access.redhat.com/solutions/41278 for how to blacklist a kernel module to prevent it from loading automatically. Workaround: To mitigate this issue, prevent the `qrtr` kernel module from loading. Create a file `/etc/modprobe.d/blacklist-qrtr.conf` with the content `blacklist qrtr`. A system reboot is required for this change to take effect. This may impact functionality that relies on the QRTR inter-process communication mechanism, such as communication with modems or other remote processors.

🔗 References (17)