CVE-2026-23338
Full vulnerability record from the local CVENow database.
Description
In the Linux kernel, the following vulnerability has been resolved: drm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings Userspace can either deliberately pass in the too small num_fences, or the required number can legitimately grow between the two calls to the userq wait ioctl. In both cases we do not want the emit the kernel warning backtrace since nothing is wrong with the kernel and userspace will simply get an errno reported back. So lets simply drop the WARN_ONs. (cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)
Severity
MEDIUM
CVSS score
5.5
(v3.1)
Vulnerability status
Analyzed
Source identifier
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Published
2026-03-25 11:16:31.537000
Last modified
2026-11-05 22:18:15.803000
View original CVE JSON
{
"id": "CVE-2026-23338",
"sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"published": "2026-03-25T11:16:31.537",
"lastModified": "2026-11-05T22:18:15.803",
"vulnStatus": "Analyzed",
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdgpu/userq: Do not allow userspace to trivially triger kernel warnings\n\nUserspace can either deliberately pass in the too small num_fences, or the\nrequired number can legitimately grow between the two calls to the userq\nwait ioctl. In both cases we do not want the emit the kernel warning\nbacktrace since nothing is wrong with the kernel and userspace will simply\nget an errno reported back. So lets simply drop the WARN_ONs.\n\n(cherry picked from commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)"
},
{
"lang": "es",
"value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\ndrm/amdgpu/userq: No permitir que el espacio de usuario active trivialmente advertencias del kernel\n\nEl espacio de usuario puede pasar deliberadamente un num_fences demasiado pequeño, o el número requerido puede crecer legítimamente entre las dos llamadas al ioctl de espera de userq. En ambos casos no queremos emitir el rastreo de advertencia del kernel, ya que no hay ningún problema con el kernel y el espacio de usuario simplemente recibirá un errno informado. Así que simplemente descartemos los WARN_ON.\n\n(extraído del commit 2c333ea579de6cc20ea7bc50e9595ef72863e65c)"
}
],
"affected": [
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"affectedData": [
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"drivers/gpu/drm/amd/amdgpu/amdgpu_userq_fence.c"
],
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"metrics": {
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"baseScore": 5.5,
"baseSeverity": "MEDIUM",
"attackVector": "LOCAL",
"attackComplexity": "LOW",
"privilegesRequired": "LOW",
"userInteraction": "NONE",
"scope": "UNCHANGED",
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"availabilityImpact": "HIGH"
},
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"impactScore": 3.6
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],
"ssvcV203": [
{
"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"ssvcData": {
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"id": "CVE-2026-23338",
"options": [
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"weaknesses": [
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"source": "[email protected]",
"type": "Primary",
"description": [
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"configurations": [
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