CVE-2026-74712 (GCVE-0-2026-74712)
Vulnerability from cvelistv5 – Published: 2026-08-22 15:33 – Updated: 2026-08-22 15:33
VLAI
EPSS
VEX
Title
vdpa/mlx5: Fix buffer length in create_direct_keys()
Summary
In the Linux kernel, the following vulnerability has been resolved:
vdpa/mlx5: Fix buffer length in create_direct_keys()
We have seen in our CI the following KASAN message:
BUG: KASAN: slab-out-of-bounds in cmd_exec+0x550/0xca0 [mlx5_core]
Read of size 272 at addr 0000000176795020 by task qemu-system-s39/82764
[...]
[<000011388ab3a7a0>] cmd_exec+0x550/0xca0 [mlx5_core]
[<000011388ab3b61c>] mlx5_cmd_exec_cb+0x25c/0x4f0 [mlx5_core]
[<000011388b21e82e>] mlx5_vdpa_exec_async_cmds+0x22e/0x5e0 [mlx5_vdpa]
[<000011388b21fd44>] create_direct_keys+0x954/0xef0 [mlx5_vdpa]
[...]
The buggy address is located 4128 bytes inside of
allocated 4384-byte region [0000000176794000, 0000000176795120)
So in essence we read 16 bytes beyond 4384-byte allocation.
create_direct_keys calculates the pointer and length for in and out
buffers.
The size calculation for in includes the entire structure
size (out + in + mtt[]) but the pointer passed to cmd_exec points only
to the 'in' field, skipping the 'out' field.
This causes mlx5_copy_to_msg() to read beyond the allocated buffer
by sizeof(out) bytes when copying command data.
Properly calculate the input size to match the pointer and allocation size.
Severity
No CVSS data available.
Assigner
References
Impacted products
2 products
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| Linux | Linux |
Affected:
0071b138d44af4296bf871e6624369ce697b4b15 , < ec3bb289cf19d526224117d5d450a5fd9cbd5ab2
(git)
Affected: 0071b138d44af4296bf871e6624369ce697b4b15 , < cde8931a25392670dd59a0acfcab87a830ab66c5 (git) Affected: 0071b138d44af4296bf871e6624369ce697b4b15 , < 6c8a9f7bc00301e533a5366384f3070a8e7f8430 (git) Affected: 0071b138d44af4296bf871e6624369ce697b4b15 , < 727e1f569855df83579edbd73dcb4a0723543a12 (git) |
guessed | |
| Linux | Linux |
Affected:
6.12
Unaffected: 0 , < 6.12 (semver) Unaffected: 6.12.104 , ≤ 6.12.* (semver) Unaffected: 6.18.45 , ≤ 6.18.* (semver) Unaffected: 7.1.9 , ≤ 7.1.* (semver) Unaffected: 7.2 , ≤ * (original_commit_for_fix) |
guessed |
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"drivers/vdpa/mlx5/core/mr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "ec3bb289cf19d526224117d5d450a5fd9cbd5ab2",
"status": "affected",
"version": "0071b138d44af4296bf871e6624369ce697b4b15",
"versionType": "git"
},
{
"lessThan": "cde8931a25392670dd59a0acfcab87a830ab66c5",
"status": "affected",
"version": "0071b138d44af4296bf871e6624369ce697b4b15",
"versionType": "git"
},
{
"lessThan": "6c8a9f7bc00301e533a5366384f3070a8e7f8430",
"status": "affected",
"version": "0071b138d44af4296bf871e6624369ce697b4b15",
"versionType": "git"
},
{
"lessThan": "727e1f569855df83579edbd73dcb4a0723543a12",
"status": "affected",
"version": "0071b138d44af4296bf871e6624369ce697b4b15",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"drivers/vdpa/mlx5/core/mr.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "6.12"
},
{
"lessThan": "6.12",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.104",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.18.*",
"status": "unaffected",
"version": "6.18.45",
"versionType": "semver"
},
{
"lessThanOrEqual": "7.1.*",
"status": "unaffected",
"version": "7.1.9",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "7.2",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.104",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.18.45",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.1.9",
"versionStartIncluding": "6.12",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "7.2",
"versionStartIncluding": "6.12",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "In the Linux kernel, the following vulnerability has been resolved:\n\nvdpa/mlx5: Fix buffer length in create_direct_keys()\n\nWe have seen in our CI the following KASAN message:\nBUG: KASAN: slab-out-of-bounds in cmd_exec+0x550/0xca0 [mlx5_core]\nRead of size 272 at addr 0000000176795020 by task qemu-system-s39/82764\n[...]\n[\u003c000011388ab3a7a0\u003e] cmd_exec+0x550/0xca0 [mlx5_core]\n[\u003c000011388ab3b61c\u003e] mlx5_cmd_exec_cb+0x25c/0x4f0 [mlx5_core]\n[\u003c000011388b21e82e\u003e] mlx5_vdpa_exec_async_cmds+0x22e/0x5e0 [mlx5_vdpa]\n[\u003c000011388b21fd44\u003e] create_direct_keys+0x954/0xef0 [mlx5_vdpa]\n[...]\nThe buggy address is located 4128 bytes inside of\nallocated 4384-byte region [0000000176794000, 0000000176795120)\n\nSo in essence we read 16 bytes beyond 4384-byte allocation.\ncreate_direct_keys calculates the pointer and length for in and out\nbuffers.\nThe size calculation for in includes the entire structure\nsize (out + in + mtt[]) but the pointer passed to cmd_exec points only\nto the \u0027in\u0027 field, skipping the \u0027out\u0027 field.\n\nThis causes mlx5_copy_to_msg() to read beyond the allocated buffer\nby sizeof(out) bytes when copying command data.\n\nProperly calculate the input size to match the pointer and allocation size."
}
],
"providerMetadata": {
"dateUpdated": "2026-08-22T15:33:08.392Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/ec3bb289cf19d526224117d5d450a5fd9cbd5ab2"
},
{
"url": "https://git.kernel.org/stable/c/cde8931a25392670dd59a0acfcab87a830ab66c5"
},
{
"url": "https://git.kernel.org/stable/c/6c8a9f7bc00301e533a5366384f3070a8e7f8430"
},
{
"url": "https://git.kernel.org/stable/c/727e1f569855df83579edbd73dcb4a0723543a12"
}
],
"title": "vdpa/mlx5: Fix buffer length in create_direct_keys()",
"x_generator": {
"engine": "bippy-1.2.0"
}
}
},
"cveMetadata": {
"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"assignerShortName": "Linux",
"cveId": "CVE-2026-74712",
"datePublished": "2026-08-22T15:33:08.392Z",
"dateReserved": "2026-08-15T05:44:03.928Z",
"dateUpdated": "2026-08-22T15:33:08.392Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2026-74712\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-22T16:16:45.957\",\"lastModified\":\"2026-08-22T16:16:45.957\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nvdpa/mlx5: Fix buffer length in create_direct_keys()\\n\\nWe have seen in our CI the following KASAN message:\\nBUG: KASAN: slab-out-of-bounds in cmd_exec+0x550/0xca0 [mlx5_core]\\nRead of size 272 at addr 0000000176795020 by task qemu-system-s39/82764\\n[...]\\n[\u003c000011388ab3a7a0\u003e] cmd_exec+0x550/0xca0 [mlx5_core]\\n[\u003c000011388ab3b61c\u003e] mlx5_cmd_exec_cb+0x25c/0x4f0 [mlx5_core]\\n[\u003c000011388b21e82e\u003e] mlx5_vdpa_exec_async_cmds+0x22e/0x5e0 [mlx5_vdpa]\\n[\u003c000011388b21fd44\u003e] create_direct_keys+0x954/0xef0 [mlx5_vdpa]\\n[...]\\nThe buggy address is located 4128 bytes inside of\\nallocated 4384-byte region [0000000176794000, 0000000176795120)\\n\\nSo in essence we read 16 bytes beyond 4384-byte allocation.\\ncreate_direct_keys calculates the pointer and length for in and out\\nbuffers.\\nThe size calculation for in includes the entire structure\\nsize (out + in + mtt[]) but the pointer passed to cmd_exec points only\\nto the \u0027in\u0027 field, skipping the \u0027out\u0027 field.\\n\\nThis causes mlx5_copy_to_msg() to read beyond the allocated buffer\\nby sizeof(out) bytes when copying command data.\\n\\nProperly calculate the input size to match the pointer and allocation size.\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/vdpa/mlx5/core/mr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"0071b138d44af4296bf871e6624369ce697b4b15\",\"lessThan\":\"ec3bb289cf19d526224117d5d450a5fd9cbd5ab2\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0071b138d44af4296bf871e6624369ce697b4b15\",\"lessThan\":\"cde8931a25392670dd59a0acfcab87a830ab66c5\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0071b138d44af4296bf871e6624369ce697b4b15\",\"lessThan\":\"6c8a9f7bc00301e533a5366384f3070a8e7f8430\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"0071b138d44af4296bf871e6624369ce697b4b15\",\"lessThan\":\"727e1f569855df83579edbd73dcb4a0723543a12\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/vdpa/mlx5/core/mr.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"6.12\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"6.12\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.104\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.45\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.9\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/6c8a9f7bc00301e533a5366384f3070a8e7f8430\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/727e1f569855df83579edbd73dcb4a0723543a12\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cde8931a25392670dd59a0acfcab87a830ab66c5\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ec3bb289cf19d526224117d5d450a5fd9cbd5ab2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}
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Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
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.
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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