ghsa-7472-5646-8g66
Vulnerability from github
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.
[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: ? kvfree_call_rcu+0xf0/0x3a0 ? kthread+0xf3/0x120 ? kthread_complete_and_exit+0x20/0x20 ? ret_from_fork+0x1f/0x30 Modules linked in: rfkill sunrpc ... [last unloaded: torture] CR2: ffffffffc0601a87 ---[ end trace 0000000000000000 ]---
{
"affected": [],
"aliases": [
"CVE-2023-53291"
],
"database_specific": {
"cwe_ids": [],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-09-16T08:15:38Z",
"severity": null
},
"details": "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 \u0027kfree_rcu_test\u0027 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 \u003cTASK\u003e\n ? kvfree_call_rcu+0xf0/0x3a0\n ? kthread+0xf3/0x120\n ? kthread_complete_and_exit+0x20/0x20\n ? ret_from_fork+0x1f/0x30\n \u003c/TASK\u003e\n Modules linked in: rfkill sunrpc ... [last unloaded: torture]\n CR2: ffffffffc0601a87\n ---[ end trace 0000000000000000 ]---",
"id": "GHSA-7472-5646-8g66",
"modified": "2025-09-16T15:32:33Z",
"published": "2025-09-16T15:32:33Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2023-53291"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/1dd7547c7610723b2b6afe1a3c4ddb2bde63387c"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/23fc8df26dead16687ae6eb47b0561a4a832e2f6"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/29b1da4f90fc42c91beb4e400d926194925ad31b"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/604d6a5ff718874904b0fe614878a42b42c0d699"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/b8a6ba524d41f4da102e65f90498d9a910839621"
},
{
"type": "WEB",
"url": "https://git.kernel.org/stable/c/f766d45ab294871a3d588ee76c666852f151cad9"
}
],
"schema_version": "1.4.0",
"severity": []
}
Sightings
| Author | Source | Type | Date |
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