{"id":"DEBIAN-CVE-2023-53587","details":"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:      [\u003c60047a58\u003e] show_stack+0x25e/0x282      [\u003c60c609e0\u003e] dump_stack_lvl+0x96/0xfd      [\u003c60c50d4c\u003e] print_report+0x1a7/0x5a8      [\u003c603078d3\u003e] kasan_report+0xc1/0xe9      [\u003c60308950\u003e] __asan_report_load8_noabort+0x1b/0x1d      [\u003c60232844\u003e] irq_work_run_list+0x11a/0x13a      [\u003c602328b4\u003e] irq_work_tick+0x24/0x34      [\u003c6017f9dc\u003e] update_process_times+0x162/0x196      [\u003c6019f335\u003e] tick_sched_handle+0x1a4/0x1c3      [\u003c6019fd9e\u003e] tick_sched_timer+0x79/0x10c      [\u003c601812b9\u003e] __hrtimer_run_queues.constprop.0+0x425/0x695      [\u003c60182913\u003e] hrtimer_interrupt+0x16c/0x2c4      [\u003c600486a3\u003e] 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.","modified":"2026-09-15T09:02:51.771321251Z","published":"2025-10-04T16:15:55.060Z","upstream":["CVE-2023-53587"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2023-53587"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.1.37-1"}]}],"versions":["6.1.27-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53587.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53587.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.3.7-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2023-53587.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}