High
Security advisory
In memcached before 1.5.14, a NULL pointer dereference was found in the "lru mode" and "lru temp_ttl" commands. This causes a denial of service when parsing crafted lru command messages in process_lru_command in memcached.c.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2019-11596
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 12:35 UTC · Revision 1
Source evidence
In memcached before 1.5.14, a NULL pointer dereference was found in the "lru mode" and "lru temp_ttl" commands. This causes a denial of service when parsing crafted lru command messages in process_lru_command in memcached.c.
osv:CVE-2019-11596
Complete source record
{
"id": "c0c4dd1f01e1f92b0f412d7eec1768c11270081f0b9eb64e2bb4c6128c4dd63d",
"url": "https://osv.dev/vulnerability/CVE-2019-11596",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2019-11596",
"summary": "In memcached before 1.5.14, a NULL pointer dereference was found in the \"lru mode\" and \"lru temp_ttl\" commands. This causes a denial of service when parsing crafted lru command messages in process_lru_command in memcached.c.",
"evidence": "osv:CVE-2019-11596",
"products": [],
"severity": "high",
"structured": {
"id": "CVE-2019-11596",
"aliases": [
"CVE-2019-11596"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/memcached/memcached",
"type": "GIT",
"events": [
{
"introduced": "0"
},
{
"fixed": "50bdc9f3e134122e280031683f2b502f84e96624"
},
{
"fixed": "d35334f368817a77a6bd1f33c6a5676b2c402c02"
}
],
"database_specific": {
"extracted_events": [
{
"cpe": "cpe:2.3:a:memcached:memcached:*:*:*:*:*:*:*:*",
"range": [
{
"introduced": "0"
},
{
"fixed": "1.5.14"
}
],
"source": "CPE_RANGE"
},
{
"range": [
{
"fixed": "d35334f368817a77a6bd1f33c6a5676b2c402c02"
}
],
"source": "REFERENCES_COMMIT"
}
]
}
}
],
"versions": [
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"1.5.12",
"1.5.11",
"1.5.10",
"1.5.9",
"1.5.8",
"1.5.7",
"1.5.6",
"1.5.5",
"1.5.4",
"1.5.3",
"1.5.2",
"1.5.1",
"1.5.0",
"1.4.39",
"1.4.38",
"1.4.37",
"1.4.36",
"1.4.35",
"1.4.34",
"1.4.33",
"1.4.32",
"1.4.31",
"1.4.30",
"1.4.29",
"1.4.28",
"1.4.27",
"1.4.26",
"1.4.25",
"1.4.24",
"1.4.23",
"1.4.22",
"1.4.21",
"1.4.20",
"1.4.19",
"1.4.18",
"1.4.17",
"1.4.16",
"1.4.15",
"1.4.14",
"1.4.13",
"1.4.12",
"1.4.11-rc1",
"1.4.11",
"1.4.11-beta1",
"1.4.10",
"1.4.9",
"1.4.8",
"1.4.8-rc1",
"1.4.7-rc1",
"1.4.7",
"1.4.6",
"1.4.6-rc1",
"1.4.5",
"1.4.4",
"1.4.3",
"1.4.3-rc2",
"1.4.3-rc1",
"1.4.2",
"1.4.2-rc1",
"1.4.1",
"1.4.1-rc1",
"1.4.0",
"1.4-rc1",
"1.4.0-rc1",
"1.3.3",
"1.3.2",
"1.2.4",
"1.2.3",
"1.2.2",
"1.2.1",
"1.2.0"
],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-11596.json",
"vanir_signatures": [
{
"id": "CVE-2019-11596-1967f0fc",
"digest": {
"threshold": 0.9,
"line_hashes": [
"336338268569158499963052161425897069766",
"233805561904951606682463767113544671142",
"231229471521055592333822676927951654106",
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},
"source": "https://github.com/memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02",
"target": {
"file": "memcached.c"
},
"deprecated": false,
"signature_type": "Line",
"signature_version": "v1"
},
{
"id": "CVE-2019-11596-dd15207d",
"digest": {
"length": 1658,
"function_hash": "42977763465979728781145027344553028869"
},
"source": "https://github.com/memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02",
"target": {
"file": "memcached.c",
"function": "process_lru_command"
},
"deprecated": false,
"signature_type": "Function",
"signature_version": "v1"
}
],
"vanir_signatures_modified": "2026-10-20T13:56:16Z"
}
}
],
"modified": "2026-10-20T13:56:16.327090231Z",
"provider": "osv",
"references": [
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/UUE3QBMP5UWTXMPKJREUICH6DIK6SOBX/",
"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Y2CCWRM4LHB253KG5SPOKRVDCXQX5VZR/",
"https://usn.ubuntu.com/3963-1/",
"https://github.com/memcached/memcached/commit/d35334f368817a77a6bd1f33c6a5676b2c402c02",
"https://github.com/memcached/memcached/compare/ee1cfe3...50bdc9f",
"https://github.com/memcached/memcached/issues/474"
],
"provider_metadata": {
"unresolved_ranges": [
{
"cpes": [
"cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:18.10:*:*:*:*:*:*:*",
"cpe:2.3:o:canonical:ubuntu_linux:19.04:*:*:*:*:*:*:*"
],
"vendor_product": "canonical:ubuntu_linux",
"extracted_events": [
{
"range": [
{
"introduced": "18.04"
},
{
"last_affected": "18.04"
},
{
"introduced": "18.10"
},
{
"last_affected": "18.10"
},
{
"introduced": "19.04"
},
{
"last_affected": "19.04"
}
],
"source": "CPE_STRING"
}
]
}
]
}
},
"related_cves": [
{
"value": "CVE-2019-11596",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 388412,
"published_at": "2019-04-29T15:29:00.983+00:00"
}