CVE-2023-53291
Estado: ModificadaMedia (5.5)—
In the Linux kernel, the following vulnerability has been resolved:
rcu/rcuscale: Stop kfree_scale_thread thread(s) after unloading rcuscale
Running the 'kfree_rcu_test' test case [1] results in a splat [2]. The root cause is the kfree_scale_thread thread(s) continue running after unloading the rcuscale module. This commit fixes that isue by invoking kfree_scale_cleanup() from rcu_scale_cleanup() when removing the rcuscale module.
Detalles técnicos trazas, registros y código del informe original
[1] modprobe rcuscale kfree_rcu_test=1
// After some time
rmmod rcuscale
rmmod torture
[2] BUG: unable to handle page fault for address: ffffffffc0601a87
#PF: supervisor instruction fetch in kernel mode
#PF: error_code(0x0010) - not-present page
PGD 11de4f067 P4D 11de4f067 PUD 11de51067 PMD 112f4d067 PTE 0
Oops: 0010 [#1] PREEMPT SMP NOPTI
CPU: 1 PID: 1798 Comm: kfree_scale_thr Not tainted 6.3.0-rc1-rcu+ #1
Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015
RIP: 0010:0xffffffffc0601a87
Code: Unable to access opcode bytes at 0xffffffffc0601a5d.
RSP: 0018:ffffb25bc2e57e18 EFLAGS: 00010297
RAX: 0000000000000000 RBX: ffffffffc061f0b6 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff962fd0de RDI: ffffffff962fd0de
RBP: ffffb25bc2e57ea8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000
R13: 0000000000000000 R14: 000000000000000a R15: 00000000001c1dbe
FS: 0000000000000000(0000) GS:ffff921fa2200000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffc0601a5d CR3: 000000011de4c006 CR4: 0000000000370ee0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
? kvfree_call_rcu+0xf0/0x3a0
? kthread+0xf3/0x120
? kthread_complete_and_exit+0x20/0x20
? ret_from_fork+0x1f/0x30
</TASK>
Modules linked in: rfkill sunrpc ... [last unloaded: torture]
CR2: ffffffffc0601a87
---[ end trace 0000000000000000 ]---CVSS
- Versión: 3.1
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- Puntuación base: 5.5
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.15%
- Percentil entre todas las CVEs puntuadas: 4
- 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).
Tecnologías afectadas (1)
CWE
- NVD-CWE-noinfo
Referencias
- https://git.kernel.org/stable/c/1dd7547c7610723b2b6afe1a3c4ddb2bde63387c
- https://git.kernel.org/stable/c/23fc8df26dead16687ae6eb47b0561a4a832e2f6
- https://git.kernel.org/stable/c/29b1da4f90fc42c91beb4e400d926194925ad31b
- https://git.kernel.org/stable/c/604d6a5ff718874904b0fe614878a42b42c0d699
- https://git.kernel.org/stable/c/b8a6ba524d41f4da102e65f90498d9a910839621
- https://git.kernel.org/stable/c/f766d45ab294871a3d588ee76c666852f151cad9
JSON original (NVD)
Mostrar
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"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nrcu/rcuscale: Stop kfree_scale_thread thread(s) after unloading rcuscale\n\nRunning the 'kfree_rcu_test' test case [1] results in a splat [2].\nThe root cause is the kfree_scale_thread thread(s) continue running\nafter unloading the rcuscale module. This commit fixes that isue by\ninvoking kfree_scale_cleanup() from rcu_scale_cleanup() when removing\nthe rcuscale module.\n\n[1] modprobe rcuscale kfree_rcu_test=1\n // After some time\n rmmod rcuscale\n rmmod torture\n\n[2] BUG: unable to handle page fault for address: ffffffffc0601a87\n #PF: supervisor instruction fetch in kernel mode\n #PF: error_code(0x0010) - not-present page\n PGD 11de4f067 P4D 11de4f067 PUD 11de51067 PMD 112f4d067 PTE 0\n Oops: 0010 [#1] PREEMPT SMP NOPTI\n CPU: 1 PID: 1798 Comm: kfree_scale_thr Not tainted 6.3.0-rc1-rcu+ #1\n Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 0.0.0 02/06/2015\n RIP: 0010:0xffffffffc0601a87\n Code: Unable to access opcode bytes at 0xffffffffc0601a5d.\n RSP: 0018:ffffb25bc2e57e18 EFLAGS: 00010297\n RAX: 0000000000000000 RBX: ffffffffc061f0b6 RCX: 0000000000000000\n RDX: 0000000000000000 RSI: ffffffff962fd0de RDI: ffffffff962fd0de\n RBP: ffffb25bc2e57ea8 R08: 0000000000000000 R09: 0000000000000000\n R10: 0000000000000001 R11: 0000000000000001 R12: 0000000000000000\n R13: 0000000000000000 R14: 000000000000000a R15: 00000000001c1dbe\n FS: 0000000000000000(0000) GS:ffff921fa2200000(0000) knlGS:0000000000000000\n CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033\n CR2: ffffffffc0601a5d CR3: 000000011de4c006 CR4: 0000000000370ee0\n DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000\n DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400\n Call Trace:\n <TASK>\n ? kvfree_call_rcu+0xf0/0x3a0\n ? kthread+0xf3/0x120\n ? kthread_complete_and_exit+0x20/0x20\n ? ret_from_fork+0x1f/0x30\n </TASK>\n Modules linked in: rfkill sunrpc ... [last unloaded: torture]\n CR2: ffffffffc0601a87\n ---[ end trace 0000000000000000 ]---"
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"lastModified": "2026-06-17T06:44:45.593",
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