# CVE-2023-54237: linux: In the Linux kernel, the following vulnerability has been resolved: net/smc: fix potential panic dues to unprotected... CVE-2023-54237 is fixed in 73 products on 1 platform, first by RHSA-2025:20518, released November 11, 2025. It is not reported as exploited. Patch Radar priority: Urgent. - Web page: https://patchblox.com/security/cve/CVE-2023-54237 - Priority: Urgent - CVSS: 9.8 (critical) - EPSS: 0.0056 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Nov 11, 2025 ## Description In the Linux kernel, the following vulnerability has been resolved: net/smc: fix potential panic dues to unprotected smc_llc_srv_add_link() There is a certain chance to trigger the following panic: PID: 5900 TASK: ffff88c1c8af4100 CPU: 1 COMMAND: "kworker/1:48" #0 [ffff9456c1cc79a0] machine_kexec at ffffffff870665b7 #1 [ffff9456c1cc79f0] __crash_kexec at ffffffff871b4c7a #2 [ffff9456c1cc7ab0] crash_kexec at ffffffff871b5b60 #3 [ffff9456c1cc7ac0] oops_end at ffffffff87026ce7 #4 [ffff9456c1cc7ae0] page_fault_oops at ffffffff87075715 #5 [ffff9456c1cc7b58] exc_page_fault at ffffffff87ad0654 #6 [ffff9456c1cc7b80] asm_exc_page_fault at ffffffff87c00b62 [exception RIP: ib_alloc_mr+19] RIP: ffffffffc0c9cce3 RSP: ffff9456c1cc7c38 RFLAGS: 00010202 RAX: 0000000000000000 RBX: 0000000000000002 RCX: 0000000000000004 RDX: 0000000000000010 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffff88c1ea281d00 R8: 000000020a34ffff R9: ffff88c1350bbb20 R10: 0000000000000000 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000010 R14: ffff88c1ab040a50 R15: ffff88c1ea281d00 ORIG_RAX: ffffffffffffffff CS: 0010 SS: 0018 #7 [ffff9456c1cc7c60] smc_ib_get_memory_region at ffffffffc0aff6df [smc] #8 [ffff9456c1cc7c88] smcr_buf_map_link at ffffffffc0b0278c [smc] #9 [ffff9456c1cc7ce0] __smc_buf_create at ffffffffc0b03586 [smc] The reason here is that when the server tries to create a second link, smc_llc_srv_add_link() has no protection and may add a new link to link group. This breaks the security environment protected by llc_conf_mutex. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | kernel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-debug RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-debug-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-debug-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-debug-devel-matched RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-debug-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-debug-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-debug-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-devel-matched RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-64k-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-abi-stablelists RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug-devel-matched RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-debug-uki-virt RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-devel-matched RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-doc RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-debug RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-debug-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-debug-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-debug-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-debug-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-debug-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-64k-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-debug RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-debug-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-debug-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-debug-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-debug-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-debug-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-rt-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-tools RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-tools-libs RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-tools-libs-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-uki-virt RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-uki-virt-addons RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-zfcpdump RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-zfcpdump-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-zfcpdump-devel RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-zfcpdump-devel-matched RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-zfcpdump-modules RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-zfcpdump-modules-core RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | kernel-zfcpdump-modules-extra RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | libperf RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | linux Debian 12.15 (bookworm) | 6.1.20-1 | [DEBIAN-CVE-2023-54237](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54237.md) | Dec 30, 2025 | | Linux | linux Debian 13.5 (trixie) | 6.1.20-1 | [DEBIAN-CVE-2023-54237](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54237.md) | Dec 30, 2025 | | Linux | linux Debian 14 | 6.1.20-1 | [DEBIAN-CVE-2023-54237](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54237.md) | Dec 30, 2025 | | Linux | perf RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | python3-perf RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | rtla RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | | Linux | rv RHEL 9 | 0:5.14.0-611.5.1.el9_7 | [RHSA-2025:20518](https://patchblox.com/security/data/fix/linux/rhsa-2025-20518.md) | Nov 11, 2025 | --- Data as of 2026-11-08T00:53:09Z UTC. 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