CVE-2023-53587
Estado: ModificadaAlta (7.8)—
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):
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.
Detalles técnicos trazas, registros y código del informe original
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)CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Puntuación base: 7.8
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.16%
- Percentil entre todas las CVEs puntuadas: 5
- Fecha de la puntuación: 6/10/2026
EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).
🎯 Técnicas ATT&CK
Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.
- Explotación
T1068Exploitation for Privilege Escalationprivilege escalation75 % - Impacto principal
T1059Command and Scripting Interpreterexecution65 %
Vulnerabilidad use-after-free (CWE-416) en el kernel Linux con acceso local (AV:L) sin requerir interacción (UI:N), permitiendo escalada de privilegios. El crash/ejecución no autorizada resulta de la falta de sincronización en destrucción de búferes.
Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.
🛡️ Mitigaciones ATT&CK que cubren estas técnicas
Tecnologías afectadas (1)
CWE
- CWE-416
Referencias
- https://git.kernel.org/stable/c/0a65165bd24ee9231191597b7c232376fcd70cdb
- https://git.kernel.org/stable/c/1c99f65d6af2a454bfd5207b4f6a97c8474a1191
- https://git.kernel.org/stable/c/2399b1fda025e939b6fb1ac94505bcf718534e65
- https://git.kernel.org/stable/c/2702b67f59d455072a08dc40312f9b090d4dec04
- https://git.kernel.org/stable/c/372c5ee537b8366b64b691ba29e9335525e1655e
- https://git.kernel.org/stable/c/675751bb20634f981498c7d66161584080cc061e
- https://git.kernel.org/stable/c/c63741e872fcfb10e153517750f7908f0c00f60d
- https://git.kernel.org/stable/c/d9834abd8b24d1fe8092859e436fe1e0fd467c61
- https://git.kernel.org/stable/c/fc6858b7f8e1221f62ce8c6ff8a13a349c32cd76
JSON original (NVD)
Mostrar
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"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nring-buffer: Sync IRQ works before buffer destruction\n\nIf something was written to the buffer just before destruction,\nit may be possible (maybe not in a real system, but it did\nhappen in ARCH=um with time-travel) to destroy the ringbuffer\nbefore the IRQ work ran, leading this KASAN report (or a crash\nwithout KASAN):\n\n BUG: KASAN: slab-use-after-free in irq_work_run_list+0x11a/0x13a\n Read of size 8 at addr 000000006d640a48 by task swapper/0\n\n CPU: 0 PID: 0 Comm: swapper Tainted: G W O 6.3.0-rc1 #7\n Stack:\n 60c4f20f 0c203d48 41b58ab3 60f224fc\n 600477fa 60f35687 60c4f20f 601273dd\n 00000008 6101eb00 6101eab0 615be548\n Call Trace:\n [<60047a58>] show_stack+0x25e/0x282\n [<60c609e0>] dump_stack_lvl+0x96/0xfd\n [<60c50d4c>] print_report+0x1a7/0x5a8\n [<603078d3>] kasan_report+0xc1/0xe9\n [<60308950>] __asan_report_load8_noabort+0x1b/0x1d\n [<60232844>] irq_work_run_list+0x11a/0x13a\n [<602328b4>] irq_work_tick+0x24/0x34\n [<6017f9dc>] update_process_times+0x162/0x196\n [<6019f335>] tick_sched_handle+0x1a4/0x1c3\n [<6019fd9e>] tick_sched_timer+0x79/0x10c\n [<601812b9>] __hrtimer_run_queues.constprop.0+0x425/0x695\n [<60182913>] hrtimer_interrupt+0x16c/0x2c4\n [<600486a3>] um_timer+0x164/0x183\n [...]\n\n Allocated by task 411:\n save_stack_trace+0x99/0xb5\n stack_trace_save+0x81/0x9b\n kasan_save_stack+0x2d/0x54\n kasan_set_track+0x34/0x3e\n kasan_save_alloc_info+0x25/0x28\n ____kasan_kmalloc+0x8b/0x97\n __kasan_kmalloc+0x10/0x12\n __kmalloc+0xb2/0xe8\n load_elf_phdrs+0xee/0x182\n [...]\n\n The buggy address belongs to the object at 000000006d640800\n which belongs to the cache kmalloc-1k of size 1024\n The buggy address is located 584 bytes inside of\n freed 1024-byte region [000000006d640800, 000000006d640c00)\n\nAdd the appropriate irq_work_sync() so the work finishes before\nthe buffers are destroyed.\n\nPrior to the commit in the Fixes tag below, there was only a\nsingle global IRQ work, so this issue didn't exist."
}
],
"lastModified": "2026-08-04T10:19:13.403",
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