# CVE-2023-54007: linux: In the Linux kernel, the following vulnerability has been resolved: vmci_host: fix a race condition in vmci_host_pol... CVE-2023-54007 is fixed in 20 products on 1 platform, first by ALAS2023-2023-184, released May 25, 2023. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2023-54007 - Priority: High - CVSS: n/a (important) - EPSS: 0.0022 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: May 25, 2023 ## Description In the Linux kernel, the following vulnerability has been resolved: vmci_host: fix a race condition in vmci_host_poll() causing GPF During fuzzing, a general protection fault is observed in vmci_host_poll(). general protection fault, probably for non-canonical address 0xdffffc0000000019: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x00000000000000c8-0x00000000000000cf] RIP: 0010:__lock_acquire+0xf3/0x5e00 kernel/locking/lockdep.c:4926 <- omitting registers -> Call Trace: lock_acquire+0x1a4/0x4a0 kernel/locking/lockdep.c:5672 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0xb3/0x100 kernel/locking/spinlock.c:162 add_wait_queue+0x3d/0x260 kernel/sched/wait.c:22 poll_wait include/linux/poll.h:49 [inline] vmci_host_poll+0xf8/0x2b0 drivers/misc/vmw_vmci/vmci_host.c:174 vfs_poll include/linux/poll.h:88 [inline] do_pollfd fs/select.c:873 [inline] do_poll fs/select.c:921 [inline] do_sys_poll+0xc7c/0x1aa0 fs/select.c:1015 __do_sys_ppoll fs/select.c:1121 [inline] __se_sys_ppoll+0x2cc/0x330 fs/select.c:1101 do_syscall_x64 arch/x86/entry/common.c:51 [inline] do_syscall_64+0x4e/0xa0 arch/x86/entry/common.c:82 entry_SYSCALL_64_after_hwframe+0x46/0xb0 Example thread interleaving that causes the general protection fault is as follows: CPU1 (vmci_host_poll) CPU2 (vmci_host_do_init_context) ----- ----- // Read uninitialized context context = vmci_host_dev->context; // Initialize context vmci_host_dev->context = vmci_ctx_create(); vmci_host_dev->ct_type = VMCIOBJ_CONTEXT; if (vmci_host_dev->ct_type == VMCIOBJ_CONTEXT) { // Dereferencing the wrong pointer poll_wait(..., &context->host_context); } In this scenario, vmci_host_poll() reads vmci_host_dev->context first, and then reads vmci_host_dev->ct_type to check that vmci_host_dev->context is initialized. However, since these two reads are not atomically executed, there is a chance of a race condition as described above. To fix this race condition, read vmci_host_dev->context after checking the value of vmci_host_dev->ct_type so that vmci_host_poll() always reads an initialized context. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | bpftool amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | bpftool-debuginfo amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-debuginfo amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-debuginfo-common-aarch64 amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-debuginfo-common-x86_64 amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-devel amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-headers amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-libbpf amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-libbpf-devel amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-libbpf-static amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-livepatch-6.1.29-47.49 amzn 2023 | 1.0-0.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-tools amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-tools-debuginfo amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | kernel-tools-devel amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | linux Debian 12.15 (bookworm) | 6.1.37-1 | [DEBIAN-CVE-2023-54007](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54007.md) | Dec 24, 2025 | | Linux | linux Debian 13.5 (trixie) | 6.3.7-1 | [DEBIAN-CVE-2023-54007](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54007.md) | Dec 24, 2025 | | Linux | linux Debian 14 | 6.3.7-1 | [DEBIAN-CVE-2023-54007](https://patchblox.com/security/data/fix/linux/debian-cve-2023-54007.md) | Dec 24, 2025 | | Linux | perf amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | perf-debuginfo amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | python3-perf amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | | Linux | python3-perf-debuginfo amzn 2023 | 6.1.29-47.49.amzn2023 | [ALAS2023-2023-184](https://patchblox.com/security/data/fix/linux/alas2023-2023-184.md) | May 25, 2023 | --- Data as of 2026-11-08T00:53:09Z UTC. 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