drm/panthor: validate userspace queue count against initialized firmware slot count
In the Linux kernel, the following vulnerability has been resolved: drm/panthor: validate userspace queue count against initialized firmware slot count In panthor_drv.c:panthor_ioctl_group_create(), the queue count is validated against the hardcoded maximum: if (!args->queues.count || args->queues.count > MAX_CS_PER_CSG) return -EINVAL; However, if the firmware reports fewer slots than MAX_CS_PER_CSG, panthor_fw_init_ifaces() will only initialize that smaller number of stream interfaces. If unprivileged userspace requests more queues than the firmware reported (but no more than MAX_CS_PER_CSG), cs_slot_prog_locked() fetches an uninitialized stream interface and may crash when dereferencing cs_iface->input->ringbuf_base.
CVE-2026-99003
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-99003
Linux
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Linux
Source reference: /containers/cna/affected/1/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "de85488138247d034eb3241840424a54d660926b",
"lessThan": "4487cf79bf173f2b426a02d102076f8a20d23b96",
"versionType": "git"
},
{
"status": "affected",
"version": "de85488138247d034eb3241840424a54d660926b",
"lessThan": "fdee3570b282a6c8699aea63fa5694355e010ec9",
"versionType": "git"
},
{
"status": "affected",
"version": "de85488138247d034eb3241840424a54d660926b",
"lessThan": "9be126be5f78bc331a930295af97c9b1f9158f06",
"versionType": "git"
},
{
"status": "affected",
"version": "de85488138247d034eb3241840424a54d660926b",
"lessThan": "ec86c43dcfff68eab4db9bdafcd3e2b16e342e18",
"versionType": "git"
}
],
"programFiles": [
"drivers/gpu/drm/panthor/panthor_sched.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "6.10"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "6.10",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.12.113",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.2.11",
"versionType": "semver",
"lessThanOrEqual": "7.2.*"
},
{
"status": "unaffected",
"version": "7.3",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/gpu/drm/panthor/panthor_sched.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-99003
Source reference:
/cveMetadata/cveId
Publisher severity
No explicit severity was provided.
- Event
- #52846 · Revision 1
- Added to Heist Feed
- Publisher date