Medium
llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader
Type: advisorySources: Official CVE List
llama.cpp b5854 before b11275 contains an integer overflow vulnerability in gguf_init_from_reader that bypasses the CVE-2025-53630 size check when padding near-SIZE_MAX tensor sizes. Attackers can supply a crafted GGUF file whose tensor size pads to zero, causing an undersized data blob and out-of-bounds reads by consumers.
- Products
- llama.cpp
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-116840
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 13:58 UTC · Revision 1
Source evidence
llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader
core-cve · Original sourcePublished 27 Oct 2026, 00:33 UTC
llama.cpp b5854 before b11275 contains an integer overflow vulnerability in gguf_init_from_reader that bypasses the CVE-2025-53630 size check when padding near-SIZE_MAX tensor sizes. Attackers can supply a crafted GGUF file whose tensor size pads to zero, causing an undersized data blob and out-of-bounds reads by consumers.
cve:CVE-2026-116840
llama.cpp
Fixed versions: Not specified
Complete source record
{
"id": "7eda4ba9a21a3d3fe70dec1d570237ef4a68ab6f130dd3380ad5ded73dbc7da0",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-116840",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "llama.cpp b5854 before b11275 Integer Overflow in gguf_init_from_reader",
"summary": "llama.cpp b5854 before b11275 contains an integer overflow vulnerability in gguf_init_from_reader that bypasses the CVE-2025-53630 size check when padding near-SIZE_MAX tensor sizes. Attackers can supply a crafted GGUF file whose tensor size pads to zero, causing an undersized data blob and out-of-bounds reads by consumers.",
"evidence": "cve:CVE-2026-116840",
"products": [
{
"name": {
"value": "llama.cpp",
"evidence": "/containers/cna/affected/0/product"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": []
}
],
"severity": "medium",
"structured": {
"id": "CVE-2026-116840",
"aliases": [
"CVE-2026-116840"
],
"metrics": [
{
"format": "CVSS",
"cvssV4_0": {
"version": "4.0",
"baseScore": 6.9,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N",
"userInteraction": "PASSIVE",
"attackComplexity": "LOW",
"attackRequirements": "NONE",
"privilegesRequired": "NONE",
"subIntegrityImpact": "NONE",
"vulnIntegrityImpact": "NONE",
"subAvailabilityImpact": "NONE",
"vulnAvailabilityImpact": "HIGH",
"subConfidentialityImpact": "NONE",
"vulnConfidentialityImpact": "LOW"
}
},
{
"format": "CVSS",
"cvssV3_1": {
"scope": "UNCHANGED",
"version": "3.1",
"baseScore": 6.1,
"attackVector": "LOCAL",
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:H",
"integrityImpact": "NONE",
"userInteraction": "REQUIRED",
"attackComplexity": "LOW",
"availabilityImpact": "HIGH",
"privilegesRequired": "NONE",
"confidentialityImpact": "LOW"
}
}
],
"affected": [
{
"vendor": "ggml-org",
"product": "llama.cpp",
"versions": [
{
"status": "affected",
"version": "b5854",
"lessThan": "b11275",
"versionType": "custom"
},
{
"status": "affected",
"version": "0.1.0",
"lessThan": "0.6.0",
"versionType": "semver"
}
],
"packageURL": "pkg:github/ggml-org/llama.cpp",
"defaultStatus": "unaffected"
}
],
"modified": "2026-10-27T14:14:10.931Z",
"provider": "cve",
"references": [
"https://github.com/ggml-org/llama.cpp/issues/26978",
"https://github.com/ggml-org/llama.cpp/pull/26979",
"https://github.com/ggml-org/llama.cpp/commit/a6ea155d3d38b3f6f43d0c0dc29c2d592413ef44",
"https://github.com/ggml-org/llama.cpp/blob/v0.5.0/ggml/src/gguf.cpp#L794-L795",
"https://github.com/ggml-org/llama.cpp/releases/tag/b11275",
"https://www.vulncheck.com/advisories/llama-cpp-b5854-before-b11275-integer-overflow-in-gguf-init-from-reader"
],
"provider_metadata": {
"adp": [
{
"title": "CISA ADP Vulnrichment",
"metrics": [
{
"other": {
"type": "ssvc",
"content": {
"id": "CVE-2026-116840",
"role": "CISA Coordinator",
"options": [
{
"Exploitation": "none"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"version": "2.0.3",
"timestamp": "2026-10-27T13:42:18.688377Z"
}
}
}
],
"providerMetadata": {
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP",
"dateUpdated": "2026-10-27T14:14:10.931Z"
}
}
],
"cna": {
"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
"shortName": "VulnCheck",
"dateUpdated": "2026-10-27T00:33:59.834Z"
}
}
},
"related_cves": [
{
"value": "CVE-2026-116840",
"evidence": "/cveMetadata/cveId"
}
],
"security_relevant": true,
"severity_evidence": "/containers/cna/metrics"
},
"source_id": "core-cve",
"document_id": 392666,
"published_at": "2026-10-27T00:33:59.834+00:00"
}