vhost_iotlb: bound map allocation in add_range
In the Linux kernel, the following vulnerability has been resolved: vhost_iotlb: bound map allocation in add_range vhost_iotlb_add_range_ctx() only retires an old entry when the table has a non-zero limit, has exactly reached that limit and has VHOST_IOTLB_FLAG_RETIRE set. Non-retiring tables can keep allocating entries after reaching their configured limit. Existing vhost devices allocate their IOTLB with max_iotlb_entries from vhost.c, which defaults to 2048 and is tunable by module parameter. Use the caller-provided limit at the allocation point instead of adding a separate default in the common IOTLB helper, and reject non-positive values in vhost paths that can report an error. Other vhost IOTLB users should not create zero-limit tables when entries can be populated from userspace or guest-controlled requests. Add caller-side max_iotlb_entries parameters for mlx5 vDPA, VDUSE and vhost-vDPA. Reject non-positive VDUSE and vhost-vDPA values, and require at least two entries for vdpa_sim and mlx5 vDPA paths that install full-range mappings, since those mappings are split into two IOTLB entries. Handle full-range mappings in the common helper by checking that the IOTLB can hold both split entries before inserting the first half. This avoids returning an error after leaving a half mapping behind. When the table is full, keep the existing retire behavior for retiring tables and return -ENOSPC for non-retiring tables. Reuse the retired map node instead of freeing it and allocati
CVE-2026-74713
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-2026-74713
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": "0bbe30668d89ec8a309f28ced6d092c90fb23e8c",
"lessThan": "96da3e1439e7d689eea09fc9b6227fbab5b88ac3",
"versionType": "git"
},
{
"status": "affected",
"version": "0bbe30668d89ec8a309f28ced6d092c90fb23e8c",
"lessThan": "eb70200e34772572ad08e99291b08afea6522111",
"versionType": "git"
},
{
"status": "affected",
"version": "0bbe30668d89ec8a309f28ced6d092c90fb23e8c",
"lessThan": "b57164cdddb46924ff9fa191b727ca097744de88",
"versionType": "git"
},
{
"status": "affected",
"version": "0bbe30668d89ec8a309f28ced6d092c90fb23e8c",
"lessThan": "ae128dd19040ee06a4f8143c7ced4d18080d7a9a",
"versionType": "git"
},
{
"status": "affected",
"version": "0bbe30668d89ec8a309f28ced6d092c90fb23e8c",
"lessThan": "1ed35ac7f3fe2b4396bdd29ac3a7f0ebc0829e94",
"versionType": "git"
}
],
"programFiles": [
"drivers/vdpa/mlx5/core/mlx5_vdpa.h",
"drivers/vdpa/mlx5/core/mr.c",
"drivers/vdpa/mlx5/core/resources.c",
"drivers/vdpa/vdpa_sim/vdpa_sim.c",
"drivers/vdpa/vdpa_user/iova_domain.c",
"drivers/vhost/iotlb.c",
"drivers/vhost/vdpa.c",
"drivers/vhost/vhost.c"
],
"defaultStatus": "unaffected"
},
{
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"product": "Linux",
"versions": [
{
"status": "affected",
"version": "5.7"
},
{
"status": "unaffected",
"version": "0",
"lessThan": "5.7",
"versionType": "semver"
},
{
"status": "unaffected",
"version": "6.6.160",
"versionType": "semver",
"lessThanOrEqual": "6.6.*"
},
{
"status": "unaffected",
"version": "6.12.114",
"versionType": "semver",
"lessThanOrEqual": "6.12.*"
},
{
"status": "unaffected",
"version": "6.18.57",
"versionType": "semver",
"lessThanOrEqual": "6.18.*"
},
{
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver",
"lessThanOrEqual": "7.1.*"
},
{
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix",
"lessThanOrEqual": "*"
}
],
"programFiles": [
"drivers/vdpa/mlx5/core/mlx5_vdpa.h",
"drivers/vdpa/mlx5/core/mr.c",
"drivers/vdpa/mlx5/core/resources.c",
"drivers/vdpa/vdpa_sim/vdpa_sim.c",
"drivers/vdpa/vdpa_user/iova_domain.c",
"drivers/vhost/iotlb.c",
"drivers/vhost/vdpa.c",
"drivers/vhost/vhost.c"
],
"defaultStatus": "affected"
}
]- Related CVEs
- CVE-2026-74713
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #46591 · Revision 1
- Added to Heist Feed
- Publisher date