CVE-2025-68320
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: lan966x: Fix sleeping in atomic context The following warning was seen when we try to connect using ssh to the device. BUG: sleeping function called from invalid context at kernel/locking/mutex.c:575 in_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 104, name: dropbear preempt_count: 1, expected: 0 INFO: lockdep is turned off. CPU: 0 UID: 0 PID: 104 Comm: dropbear Tainted: G W 6.18.0-rc2-00399-g6f1ab1b109b9-dirty #530 NONE Tainted: [W]=WARN Hardware name: Generic DT based system Call trace: unwind_backtrace from show_stack+0x10/0x14 show_stack from dump_stack_lvl+0x7c/0xac dump_stack_lvl from __might_resched+0x16c/0x2b0 __might_resched from __mutex_lock+0x64/0xd34 __mutex_lock from mutex_lock_nested+0x1c/0x24 mutex_lock_nested from lan966x_stats_get+0x5c/0x558 lan966x_stats_get from dev_get_stats+0x40/0x43c dev_get_stats from dev_seq_printf_stats+0x3c/0x184 dev_seq_printf_stats from dev_seq_show+0x10/0x30 dev_seq_show from seq_read_iter+0x350/0x4ec seq_read_iter from seq_read+0xfc/0x194 seq_read from proc_reg_read+0xac/0x100 proc_reg_read from vfs_read+0xb0/0x2b0 vfs_read from ksys_read+0x6c/0xec ksys_read from ret_fast_syscall+0x0/0x1c Exception stack(0xf0b11fa8 to 0xf0b11ff0) 1fa0: 00000001 00001000 00000008 be9048d8 00001000 00000001 1fc0: 00000001 00001000 00000008 00000003 be905920 0000001e 00000000 00000001 1fe0: 0005404c be9048c0 00018684 b6ec2cd8 It seems that we are using a mutex in a atomic context which is wrong. Change the mutex with a spinlock.
Severity
HIGH
CVSS score
7.5
(v3.1)
Vulnerability status
Deferred
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2025-12-16 16:16:11.587000
Last modified
2026-10-30 13:18:20
View original CVE JSON
{
"id": "CVE-2025-68320",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2025-12-16T16:16:11.587",
"lastModified": "2026-10-30T13:18:20.000",
"vulnStatus": "Deferred",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlan966x: Fix sleeping in atomic context\n\nThe following warning was seen when we try to connect using ssh to the device.\n\nBUG: sleeping function called from invalid context at kernel/locking/mutex.c:575\nin_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 104, name: dropbear\npreempt_count: 1, expected: 0\nINFO: lockdep is turned off.\nCPU: 0 UID: 0 PID: 104 Comm: dropbear Tainted: G W 6.18.0-rc2-00399-g6f1ab1b109b9-dirty #530 NONE\nTainted: [W]=WARN\nHardware name: Generic DT based system\nCall trace:\n unwind_backtrace from show_stack+0x10/0x14\n show_stack from dump_stack_lvl+0x7c/0xac\n dump_stack_lvl from __might_resched+0x16c/0x2b0\n __might_resched from __mutex_lock+0x64/0xd34\n __mutex_lock from mutex_lock_nested+0x1c/0x24\n mutex_lock_nested from lan966x_stats_get+0x5c/0x558\n lan966x_stats_get from dev_get_stats+0x40/0x43c\n dev_get_stats from dev_seq_printf_stats+0x3c/0x184\n dev_seq_printf_stats from dev_seq_show+0x10/0x30\n dev_seq_show from seq_read_iter+0x350/0x4ec\n seq_read_iter from seq_read+0xfc/0x194\n seq_read from proc_reg_read+0xac/0x100\n proc_reg_read from vfs_read+0xb0/0x2b0\n vfs_read from ksys_read+0x6c/0xec\n ksys_read from ret_fast_syscall+0x0/0x1c\nException stack(0xf0b11fa8 to 0xf0b11ff0)\n1fa0: 00000001 00001000 00000008 be9048d8 00001000 00000001\n1fc0: 00000001 00001000 00000008 00000003 be905920 0000001e 00000000 00000001\n1fe0: 0005404c be9048c0 00018684 b6ec2cd8\n\nIt seems that we are using a mutex in a atomic context which is wrong.\nChange the mutex with a spinlock."
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nlan966x: Corrección de suspensión en contexto atómico\n\nLa siguiente advertencia fue vista cuando intentamos conectar usando ssh al dispositivo.\n\nBUG: función de suspensión llamada desde contexto inválido en kernel/locking/mutex.c:575\nin_atomic(): 1, irqs_disabled(): 0, non_block: 0, pid: 104, name: dropbear\npreempt_count: 1, expected: 0\nINFO: lockdep está desactivado.\nCPU: 0 UID: 0 PID: 104 Comm: dropbear Tainted: G W 6.18.0-rc2-00399-g6f1ab1b109b9-dirty #530 NONE\nTainted: [W]=WARN\nNombre del hardware: Sistema genérico basado en DT\nTraza de llamada:\n unwind_backtrace desde show_stack+0x10/0x14\n show_stack desde dump_stack_lvl+0x7c/0xac\n dump_stack_lvl desde __might_resched+0x16c/0x2b0\n __might_resched desde __mutex_lock+0x64/0xd34\n __mutex_lock desde mutex_lock_nested+0x1c/0x24\n mutex_lock_nested desde lan966x_stats_get+0x5c/0x558\n lan966x_stats_get desde dev_get_stats+0x40/0x43c\n dev_get_stats desde dev_seq_printf_stats+0x3c/0x184\n dev_seq_printf_stats desde dev_seq_show+0x10/0x30\n dev_seq_show desde seq_read_iter+0x350/0x4ec\n seq_read_iter desde seq_read+0xfc/0x194\n seq_read desde proc_reg_read+0xac/0x100\n proc_reg_read desde vfs_read+0xb0/0x2b0\n vfs_read desde ksys_read+0x6c/0xec\n ksys_read desde ret_fast_syscall+0x0/0x1c\nPila de excepción(0xf0b11fa8 a 0xf0b11ff0)\n1fa0: 00000001 00001000 00000008 be9048d8 00001000 00000001\n1fc0: 00000001 00001000 00000008 00000003 be905920 0000001e 00000000 00000001\n1fe0: 0005404c be9048c0 00018684 b6ec2cd8\n\nParece que estamos usando un mutex en un contexto atómico, lo cual es incorrecto.\nCambiar el mutex por un spinlock."
}
],
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "unaffected",
"programFiles": [
"drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c",
"drivers/net/ethernet/microchip/lan966x/lan966x_main.c",
"drivers/net/ethernet/microchip/lan966x/lan966x_main.h",
"drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007",
"lessThan": "cabb8cbeab49f4b74d78a91a277e00d4f6dd5d7d",
"versionType": "git",
"status": "affected"
},
{
"version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007",
"lessThan": "5a5d2f7727752b64d13263eacd9f8d08a322e662",
"versionType": "git",
"status": "affected"
},
{
"version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007",
"lessThan": "c8ab03aa5bd9fd8bfe5d9552d8605826759fdd4d",
"versionType": "git",
"status": "affected"
},
{
"version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007",
"lessThan": "3ac743c60ec502163c435712d527eeced8d83348",
"versionType": "git",
"status": "affected"
},
{
"version": "12c2d0a5b8e2a1afc8c7738e19a0d1dd7f3d4007",
"lessThan": "0216721ce71252f60d89af49c8dff613358058d3",
"versionType": "git",
"status": "affected"
}
]
},
{
"vendor": "Linux",
"product": "Linux",
"defaultStatus": "affected",
"programFiles": [
"drivers/net/ethernet/microchip/lan966x/lan966x_ethtool.c",
"drivers/net/ethernet/microchip/lan966x/lan966x_main.c",
"drivers/net/ethernet/microchip/lan966x/lan966x_main.h",
"drivers/net/ethernet/microchip/lan966x/lan966x_vcap_impl.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"versions": [
{
"version": "5.17",
"status": "affected"
},
{
"version": "0",
"lessThan": "5.17",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.1.191",
"lessThanOrEqual": "6.1.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.6.117",
"lessThanOrEqual": "6.6.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.12.58",
"lessThanOrEqual": "6.12.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.17.8",
"lessThanOrEqual": "6.17.*",
"versionType": "semver",
"status": "unaffected"
},
{
"version": "6.18",
"lessThanOrEqual": "*",
"versionType": "original_commit_for_fix",
"status": "unaffected"
}
]
}
]
}
],
"metrics": {
"cvssMetricV31": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"type": "Secondary",
"cvssData": {
"version": "3.1",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
"baseScore": 7.5,
"baseSeverity": "HIGH",
"attackVector": "NETWORK",
"attackComplexity": "LOW",
"privilegesRequired": "NONE",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
"exploitabilityScore": 3.9,
"impactScore": 3.6
}
]
},
"references": [
{
"url": "https://git.kernel.org/stable/c/0216721ce71252f60d89af49c8dff613358058d3",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/3ac743c60ec502163c435712d527eeced8d83348",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/5a5d2f7727752b64d13263eacd9f8d08a322e662",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/c8ab03aa5bd9fd8bfe5d9552d8605826759fdd4d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/cabb8cbeab49f4b74d78a91a277e00d4f6dd5d7d",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
]
}