CVE-2025-68322
Estado: AplazadaSin puntuar—
In the Linux kernel, the following vulnerability has been resolved:
parisc: Avoid crash due to unaligned access in unwinder
Guenter Roeck reported this kernel crash on his emulated B160L machine:
While creating the stack trace, the unwinder uses the stack pointer to guess the previous frame to read the previous stack pointer from memory. The crash happens, because the unwinder tries to read from unaligned memory and as such triggers the unalignment trap handler which then leads to the spinlock recursion and finally to a deadlock.
Fix it by checking the alignment before accessing the memory.
Detalles técnicos trazas, registros y código del informe original
Starting network: udhcpc: started, v1.36.1 Backtrace: [<104320d4>] unwind_once+0x1c/0x5c [<10434a00>] walk_stackframe.isra.0+0x74/0xb8 [<10434a6c>] arch_stack_walk+0x28/0x38 [<104e5efc>] stack_trace_save+0x48/0x5c [<105d1bdc>] set_track_prepare+0x44/0x6c [<105d9c80>] ___slab_alloc+0xfc4/0x1024 [<105d9d38>] __slab_alloc.isra.0+0x58/0x90 [<105dc80c>] kmem_cache_alloc_noprof+0x2ac/0x4a0 [<105b8e54>] __anon_vma_prepare+0x60/0x280 [<105a823c>] __vmf_anon_prepare+0x68/0x94 [<105a8b34>] do_wp_page+0x8cc/0xf10 [<105aad88>] handle_mm_fault+0x6c0/0xf08 [<10425568>] do_page_fault+0x110/0x440 [<10427938>] handle_interruption+0x184/0x748 [<11178398>] schedule+0x4c/0x190 BUG: spinlock recursion on CPU#0, ifconfig/2420 lock: terminate_lock.2+0x0/0x1c, .magic: dead4ead, .owner: ifconfig/2420, .owner_cpu: 0
CVSS
NVD no ha asignado puntuación CVSS a esta CVE (habitual desde el cambio de política de abril de 2026).
Probabilidad de explotación (EPSS)
- Probabilidad de explotación en los próximos 30 días: 0.18%
- Percentil entre todas las CVEs puntuadas: 7
- 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)
⚠ Inferidas por IA a partir de la descripción — NVD aún no ha analizado esta CVE; no son CPE verificados.
Referencias
JSON original (NVD)
Mostrar
{
"id": "CVE-2025-68322",
"cveTags": [],
"metrics": {},
"affected": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"affectedData": [
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "c8921d72e390cb6fca3fb2b0c2badfda851647eb",
"lessThan": "9ac1f44723f26881b9fe7e69c7bc25397b879155",
"versionType": "git"
},
{
"status": "affected",
"version": "c8921d72e390cb6fca3fb2b0c2badfda851647eb",
"lessThan": "009270208f76456c2cefcd565da263b90bb2eadb",
"versionType": "git"
},
{
"status": "affected",
"version": "c8921d72e390cb6fca3fb2b0c2badfda851647eb",
"lessThan": "fd9f30d1038ee1624baa17a6ff11effe5f7617cb",
"versionType": "git"
}
],
"programFiles": [
"arch/parisc/kernel/unwind.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "4.19"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "4.19",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.58",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.17.8",
"versionType": "semver",
"lessThanOrEqual": "6.17.*"
},
{
"status": "unaffected",
"version": "6.18",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"arch/parisc/kernel/unwind.c"
],
"defaultStatus": "affected"
}
]
}
],
"published": "2025-12-16T16:16:11.793",
"references": [
{
"url": "https://git.kernel.org/stable/c/009270208f76456c2cefcd565da263b90bb2eadb",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/9ac1f44723f26881b9fe7e69c7bc25397b879155",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
},
{
"url": "https://git.kernel.org/stable/c/fd9f30d1038ee1624baa17a6ff11effe5f7617cb",
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"vulnStatus": "Deferred",
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nparisc: Avoid crash due to unaligned access in unwinder\n\nGuenter Roeck reported this kernel crash on his emulated B160L machine:\n\nStarting network: udhcpc: started, v1.36.1\n Backtrace:\n [<104320d4>] unwind_once+0x1c/0x5c\n [<10434a00>] walk_stackframe.isra.0+0x74/0xb8\n [<10434a6c>] arch_stack_walk+0x28/0x38\n [<104e5efc>] stack_trace_save+0x48/0x5c\n [<105d1bdc>] set_track_prepare+0x44/0x6c\n [<105d9c80>] ___slab_alloc+0xfc4/0x1024\n [<105d9d38>] __slab_alloc.isra.0+0x58/0x90\n [<105dc80c>] kmem_cache_alloc_noprof+0x2ac/0x4a0\n [<105b8e54>] __anon_vma_prepare+0x60/0x280\n [<105a823c>] __vmf_anon_prepare+0x68/0x94\n [<105a8b34>] do_wp_page+0x8cc/0xf10\n [<105aad88>] handle_mm_fault+0x6c0/0xf08\n [<10425568>] do_page_fault+0x110/0x440\n [<10427938>] handle_interruption+0x184/0x748\n [<11178398>] schedule+0x4c/0x190\n BUG: spinlock recursion on CPU#0, ifconfig/2420\n lock: terminate_lock.2+0x0/0x1c, .magic: dead4ead, .owner: ifconfig/2420, .owner_cpu: 0\n\nWhile creating the stack trace, the unwinder uses the stack pointer to guess\nthe previous frame to read the previous stack pointer from memory. The crash\nhappens, because the unwinder tries to read from unaligned memory and as such\ntriggers the unalignment trap handler which then leads to the spinlock\nrecursion and finally to a deadlock.\n\nFix it by checking the alignment before accessing the memory."
}
],
"lastModified": "2026-06-17T09:58:55.950",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}