CVE-2023-53587

CVE-2023-53587 updated by NVD

Modified

2026-08-06

Sources

nvd

Summary

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: [ ] show_stack+0x25e/0x282 [ ] dump_stack_lvl+0x96/0xfd [ ] print_report+0x1a7/0x5a8 [ ] kasan_report+0xc1/0xe9 [ ] __asan_report_load8_noabort+0x1b/0x1d [ ] irq_work_run_list+0x11a/0x13a [ ] irq_work_tick+0x24/0x34 [ ] update_process_times+0x162/0x196 [ ] tick_sched_handle+0x1a4/0x1c3 [ ] tick_sched_timer+0x79/0x10c [ ] __hrtimer_run_queues.constprop.0+0x425/0x695 [ ] hrtimer_interrupt+0x16c/0x2c4 [ ] 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.

References

• https://nvd.nist.gov/vuln/detail/CVE-2023-53587