# CVE-2023-53587: linux: In the Linux kernel, the following vulnerability has been resolved: ring-buffer: Sync IRQ works before buffer destru... CVE-2023-53587 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-2023-53587 - Priority: High - CVSS: 7.8 (high) - EPSS: 0.0017 - 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: ring-buffer: Sync IRQ works before buffer destruction If something was written to the buffer just before destruction, it may be possible (maybe not in a real system, but it did happen in ARCH=um with time-travel) to destroy the ringbuffer before the IRQ work ran, leading this KASAN report (or a crash without KASAN): BUG: KASAN: slab-use-after-free in irq_work_run_list+0x11a/0x13a Read of size 8 at addr 000000006d640a48 by task swapper/0 CPU: 0 PID: 0 Comm: swapper Tainted: G W O 6.3.0-rc1 #7 Stack: 60c4f20f 0c203d48 41b58ab3 60f224fc 600477fa 60f35687 60c4f20f 601273dd 00000008 6101eb00 6101eab0 615be548 Call Trace: [<60047a58>] show_stack+0x25e/0x282 [<60c609e0>] dump_stack_lvl+0x96/0xfd [<60c50d4c>] print_report+0x1a7/0x5a8 [<603078d3>] kasan_report+0xc1/0xe9 [<60308950>] __asan_report_load8_noabort+0x1b/0x1d [<60232844>] irq_work_run_list+0x11a/0x13a [<602328b4>] irq_work_tick+0x24/0x34 [<6017f9dc>] update_process_times+0x162/0x196 [<6019f335>] tick_sched_handle+0x1a4/0x1c3 [<6019fd9e>] tick_sched_timer+0x79/0x10c [<601812b9>] __hrtimer_run_queues.constprop.0+0x425/0x695 [<60182913>] hrtimer_interrupt+0x16c/0x2c4 [<600486a3>] um_timer+0x164/0x183 [...] Allocated by task 411: save_stack_trace+0x99/0xb5 stack_trace_save+0x81/0x9b kasan_save_stack+0x2d/0x54 kasan_set_track+0x34/0x3e kasan_save_alloc_info+0x25/0x28 ____kasan_kmalloc+0x8b/0x97 __kasan_kmalloc+0x10/0x12 __kmalloc+0xb2/0xe8 load_elf_phdrs+0xee/0x182 [...] The buggy address belongs to the object at 000000006d640800 which belongs to the cache kmalloc-1k of size 1024 The buggy address is located 584 bytes inside of freed 1024-byte region [000000006d640800, 000000006d640c00) Add the appropriate irq_work_sync() so the work finishes before the buffers are destroyed. Prior to the commit in the Fixes tag below, there was only a single global IRQ work, so this issue didn't exist. ## 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-2023-53587](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53587.md) | Oct 4, 2025 | | Linux | linux Debian 13.5 (trixie) | 6.3.7-1 | [DEBIAN-CVE-2023-53587](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53587.md) | Oct 4, 2025 | | Linux | linux Debian 14 | 6.3.7-1 | [DEBIAN-CVE-2023-53587](https://patchblox.com/security/data/fix/linux/debian-cve-2023-53587.md) | Oct 4, 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 2026-11-08T13:06:02Z UTC. 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