CVE-2023-54267 (GCVE-0-2023-54267)
Vulnerability from cvelistv5 – Published: 2025-12-30 12:15 – Updated: 2026-05-11 19:58
VLAI
EPSS
VEX
Title
powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT
Summary
In the Linux kernel, the following vulnerability has been resolved:
powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT
lppaca_shared_proc() takes a pointer to the lppaca which is typically
accessed through get_lppaca(). With DEBUG_PREEMPT enabled, this leads
to checking if preemption is enabled, for example:
BUG: using smp_processor_id() in preemptible [00000000] code: grep/10693
caller is lparcfg_data+0x408/0x19a0
CPU: 4 PID: 10693 Comm: grep Not tainted 6.5.0-rc3 #2
Call Trace:
dump_stack_lvl+0x154/0x200 (unreliable)
check_preemption_disabled+0x214/0x220
lparcfg_data+0x408/0x19a0
...
This isn't actually a problem however, as it does not matter which
lppaca is accessed, the shared proc state will be the same.
vcpudispatch_stats_procfs_init() already works around this by disabling
preemption, but the lparcfg code does not, erroring any time
/proc/powerpc/lparcfg is accessed with DEBUG_PREEMPT enabled.
Instead of disabling preemption on the caller side, rework
lppaca_shared_proc() to not take a pointer and instead directly access
the lppaca, bypassing any potential preemption checks.
[mpe: Rework to avoid needing a definition in paca.h and lppaca.h]
Severity
No CVSS data available.
Assigner
References
6 references
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
f13c13a005127b5dc5daaca190277a062d946e63 , < 953c54dfdc5d3eb7243ed902b50acb5ea1db4355
(git)
Affected: f13c13a005127b5dc5daaca190277a062d946e63 , < 2935443dc9c28499223d8c881474259e4b998f2a (git) Affected: f13c13a005127b5dc5daaca190277a062d946e63 , < 4c8568cf4c45b415854195c8832b557cdefba57a (git) Affected: f13c13a005127b5dc5daaca190277a062d946e63 , < 3c5e8e666794d7dde6d14ea846c6c04f2bb34900 (git) Affected: f13c13a005127b5dc5daaca190277a062d946e63 , < f45ee5c074013a0fbfce77a5af5efddb01f5d4f4 (git) Affected: f13c13a005127b5dc5daaca190277a062d946e63 , < eac030b22ea12cdfcbb2e941c21c03964403c63f (git) |
guessed | |
| Linux | Linux |
Affected:
3.12
Unaffected: 0 , < 3.12 (semver) Unaffected: 5.10.195 , ≤ 5.10.* (semver) Unaffected: 5.15.132 , ≤ 5.15.* (semver) Unaffected: 6.1.53 , ≤ 6.1.* (semver) Unaffected: 6.4.16 , ≤ 6.4.* (semver) Unaffected: 6.5.3 , ≤ 6.5.* (semver) Unaffected: 6.6 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
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"product": "Linux",
"programFiles": [
"arch/powerpc/include/asm/lppaca.h",
"arch/powerpc/platforms/pseries/lpar.c",
"arch/powerpc/platforms/pseries/lparcfg.c",
"arch/powerpc/platforms/pseries/setup.c",
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"programFiles": [
"arch/powerpc/include/asm/lppaca.h",
"arch/powerpc/platforms/pseries/lpar.c",
"arch/powerpc/platforms/pseries/lparcfg.c",
"arch/powerpc/platforms/pseries/setup.c",
"drivers/cpuidle/cpuidle-pseries.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "3.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.195",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.132",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.53",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.4.*",
"status": "unaffected",
"version": "6.4.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"version": "6.5.3",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.6",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.195",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
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},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.53",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.4.16",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.5.3",
"versionStartIncluding": "3.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6",
"versionStartIncluding": "3.12",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT\n\nlppaca_shared_proc() takes a pointer to the lppaca which is typically\naccessed through get_lppaca(). With DEBUG_PREEMPT enabled, this leads\nto checking if preemption is enabled, for example:\n\n BUG: using smp_processor_id() in preemptible [00000000] code: grep/10693\n caller is lparcfg_data+0x408/0x19a0\n CPU: 4 PID: 10693 Comm: grep Not tainted 6.5.0-rc3 #2\n Call Trace:\n dump_stack_lvl+0x154/0x200 (unreliable)\n check_preemption_disabled+0x214/0x220\n lparcfg_data+0x408/0x19a0\n ...\n\nThis isn\u0027t actually a problem however, as it does not matter which\nlppaca is accessed, the shared proc state will be the same.\nvcpudispatch_stats_procfs_init() already works around this by disabling\npreemption, but the lparcfg code does not, erroring any time\n/proc/powerpc/lparcfg is accessed with DEBUG_PREEMPT enabled.\n\nInstead of disabling preemption on the caller side, rework\nlppaca_shared_proc() to not take a pointer and instead directly access\nthe lppaca, bypassing any potential preemption checks.\n\n[mpe: Rework to avoid needing a definition in paca.h and lppaca.h]"
}
],
"providerMetadata": {
"dateUpdated": "2026-05-11T19:58:40.112Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/953c54dfdc5d3eb7243ed902b50acb5ea1db4355"
},
{
"url": "https://git.kernel.org/stable/c/2935443dc9c28499223d8c881474259e4b998f2a"
},
{
"url": "https://git.kernel.org/stable/c/4c8568cf4c45b415854195c8832b557cdefba57a"
},
{
"url": "https://git.kernel.org/stable/c/3c5e8e666794d7dde6d14ea846c6c04f2bb34900"
},
{
"url": "https://git.kernel.org/stable/c/f45ee5c074013a0fbfce77a5af5efddb01f5d4f4"
},
{
"url": "https://git.kernel.org/stable/c/eac030b22ea12cdfcbb2e941c21c03964403c63f"
}
],
"title": "powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2023-54267",
"datePublished": "2025-12-30T12:15:58.914Z",
"dateReserved": "2025-12-30T12:06:44.518Z",
"dateUpdated": "2026-05-11T19:58:40.112Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
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"cve": "CVE-2023-54267",
"date": "2026-10-03",
"epss": "0.00215",
"percentile": "0.10843"
},
"nvd": {
"cve": {
"affected": [
{
"affectedData": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"arch/powerpc/include/asm/lppaca.h",
"arch/powerpc/platforms/pseries/lpar.c",
"arch/powerpc/platforms/pseries/lparcfg.c",
"arch/powerpc/platforms/pseries/setup.c",
"drivers/cpuidle/cpuidle-pseries.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
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"version": "f13c13a005127b5dc5daaca190277a062d946e63",
"versionType": "git"
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{
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"versionType": "git"
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{
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"versionType": "git"
}
]
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"product": "Linux",
"programFiles": [
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"arch/powerpc/platforms/pseries/lpar.c",
"arch/powerpc/platforms/pseries/lparcfg.c",
"arch/powerpc/platforms/pseries/setup.c",
"drivers/cpuidle/cpuidle-pseries.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.12"
},
{
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"status": "unaffected",
"version": "0",
"versionType": "semver"
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{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.195",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.132",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.53",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.4.*",
"status": "unaffected",
"version": "6.4.16",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.5.*",
"status": "unaffected",
"version": "6.5.3",
"versionType": "semver"
},
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"version": "6.6",
"versionType": "original_commit_for_fix"
}
]
}
],
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\npowerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT\n\nlppaca_shared_proc() takes a pointer to the lppaca which is typically\naccessed through get_lppaca(). With DEBUG_PREEMPT enabled, this leads\nto checking if preemption is enabled, for example:\n\n BUG: using smp_processor_id() in preemptible [00000000] code: grep/10693\n caller is lparcfg_data+0x408/0x19a0\n CPU: 4 PID: 10693 Comm: grep Not tainted 6.5.0-rc3 #2\n Call Trace:\n dump_stack_lvl+0x154/0x200 (unreliable)\n check_preemption_disabled+0x214/0x220\n lparcfg_data+0x408/0x19a0\n ...\n\nThis isn\u0027t actually a problem however, as it does not matter which\nlppaca is accessed, the shared proc state will be the same.\nvcpudispatch_stats_procfs_init() already works around this by disabling\npreemption, but the lparcfg code does not, erroring any time\n/proc/powerpc/lparcfg is accessed with DEBUG_PREEMPT enabled.\n\nInstead of disabling preemption on the caller side, rework\nlppaca_shared_proc() to not take a pointer and instead directly access\nthe lppaca, bypassing any potential preemption checks.\n\n[mpe: Rework to avoid needing a definition in paca.h and lppaca.h]"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\npowerpc/pseries: Reestructurar lppaca_shared_proc() para evitar DEBUG_PREEMPT\n\nlppaca_shared_proc() toma un puntero al lppaca al que se accede t\u00edpicamente a trav\u00e9s de get_lppaca(). Con DEBUG_PREEMPT habilitado, esto lleva a verificar si la preemptibilidad est\u00e1 habilitada, por ejemplo:\n\n BUG: usando smp_processor_id() en c\u00f3digo preemptible [00000000]: grep/10693\n el llamador es lparcfg_data+0x408/0x19a0\n CPU: 4 PID: 10693 Comm: grep No contaminado 6.5.0-rc3 #2\n Traza de Llamadas:\n dump_stack_lvl+0x154/0x200 (no fiable)\n check_preemption_disabled+0x214/0x220\n lparcfg_data+0x408/0x19a0\n ...\n\nEsto no es realmente un problema, sin embargo, ya que no importa qu\u00e9 lppaca se acceda, el estado compartido del proceso ser\u00e1 el mismo. vcpudispatch_stats_procfs_init() ya soluciona esto deshabilitando la preemptibilidad, pero el c\u00f3digo lparcfg no lo hace, generando un error cada vez que se accede a /proc/powerpc/lparcfg con DEBUG_PREEMPT habilitado.\n\nEn lugar de deshabilitar la preemptibilidad en el lado del llamador, reestructurar lppaca_shared_proc() para que no tome un puntero y en su lugar acceda directamente al lppaca, evitando cualquier posible verificaci\u00f3n de preemptibilidad.\n\n[mpe: Reestructurar para evitar la necesidad de una definici\u00f3n en paca.h y lppaca.h]"
}
],
"id": "CVE-2023-54267",
"lastModified": "2026-06-17T06:47:07.517",
"metrics": {},
"published": "2025-12-30T13:16:15.517",
"references": [
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/2935443dc9c28499223d8c881474259e4b998f2a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/3c5e8e666794d7dde6d14ea846c6c04f2bb34900"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/4c8568cf4c45b415854195c8832b557cdefba57a"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/953c54dfdc5d3eb7243ed902b50acb5ea1db4355"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/eac030b22ea12cdfcbb2e941c21c03964403c63f"
},
{
"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"url": "https://git.kernel.org/stable/c/f45ee5c074013a0fbfce77a5af5efddb01f5d4f4"
}
],
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"vulnStatus": "Deferred"
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-06-30T10:13:52+00:00",
"cve": "CVE-2023-54267",
"id": "CVE-2023-54267",
"initial_release_date": "2023-01-01T00:00:00+00:00",
"product_status:fixed": "280",
"product_status:known_affected": "112",
"product_status:known_not_affected": "84",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "kernel: powerpc/pseries: Rework lppaca_shared_proc() to avoid DEBUG_PREEMPT",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2023/cve-2023-54267.json",
"version": "3"
},
"suse_vex": {
"aggregate_severity": "moderate",
"current_release_date": "2026-09-24T16:42:08Z",
"cve": "CVE-2023-54267",
"id": "CVE-2023-54267",
"initial_release_date": "2025-12-31T00:27:07Z",
"product_status:known_affected": "629",
"product_status:known_not_affected": "75",
"product_status:recommended": "299",
"source": "SUSE CSAF VEX",
"status": "interim",
"title": "SUSE CVE CVE-2023-54267",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2023-54267.json",
"version": "35"
}
}
}
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Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
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vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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