RHSA-2026:5691MediumCVSS 7.5

Red Hat Security Advisory: kernel security update

Published
March 25, 2026
Last Modified
August 4, 2026

🔗 CVE IDs covered (4)

CVE-2023-53539 →CVE-2025-38024 →CVE-2025-40240 →CVE-2025-71085 →

📋 Description

CVE-2023-53539 — kernel: RDMA/rxe: Fix incomplete state save in rxe_requester CVE-2025-38024 — kernel: Linux kernel: RDMA/rxe use-after-free vulnerability leading to potential arbitrary code execution CVE-2025-40240 — kernel: sctp: avoid NULL dereference when chunk data buffer is missing CVE-2025-71085 — kernel: ipv6: BUG() in pskb_expand_head() as part of calipso_skbuff_setattr()

🎯 Affected products149

  • Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • bpftool-0:4.18.0-372.185.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.185.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.185.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • bpftool-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.185.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.185.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.185.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • bpftool-debuginfo-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.src as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-0:4.18.0-372.185.1.el8_6.x86_64 as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.185.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS AUS (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.185.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-abi-stablelists-0:4.18.0-372.185.1.el8_6.noarch as a component of Red Hat Enterprise Linux BaseOS TUS (v.8.6)
  • kernel-core-0:4.18.0-372.185.1.el8_6.aarch64 as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-core-0:4.18.0-372.185.1.el8_6.ppc64le as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • kernel-core-0:4.18.0-372.185.1.el8_6.s390x as a component of Red Hat Enterprise Linux BaseOS E4S (v.8.6)
  • +119 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. Workaround: To mitigate this issue, prevent the rdma_rxe module from being loaded. See https://access.redhat.com/solutions/41278 for instructions on blacklisting kernel modules. Workaround: To mitigate this issue, prevent the `rxe` kernel module from loading. This can be achieved by creating a blacklist rule. 1. Create a file `/etc/modprobe.d/blacklist-rxe.conf` with the following content: ``` blacklist rxe install rxe /bin/true ``` 2. Rebuild the initial ramdisk: ```bash dracut -f -v ``` 3. Reboot the system for the changes to take effect. Warning: Blacklisting the `rxe` module may impact functionality that relies on Soft RoCE. Workaround: To mitigate this issue, prevent module sctp 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: 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.

🔗 References (7)