Search criteria
1 vulnerability by skvadrik
CVE-2026-2903 (GCVE-0-2026-2903)
Vulnerability from cvelistv5 – Published: 2026-02-22 00:32 – Updated: 2026-02-26 16:21 X_Open Source
VLAI?
Title
skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference
Summary
A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be executed locally. The exploit has been published and may be used. Patch name: febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue.
Severity ?
Assigner
References
| URL | Tags | |||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
||||||||||||||||||||||||||
Impacted products
Credits
Oneafter (VulDB User)
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-2903",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-02-26T16:21:03.435710Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-02-26T16:21:15.725Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"cpes": [
"cpe:2.3:a:re2c:re2c:*:*:*:*:*:*:*:*"
],
"product": "re2c",
"vendor": "skvadrik",
"versions": [
{
"status": "affected",
"version": "4.0"
},
{
"status": "affected",
"version": "4.1"
},
{
"status": "affected",
"version": "4.2"
},
{
"status": "affected",
"version": "4.3"
},
{
"status": "affected",
"version": "4.4"
}
]
}
],
"credits": [
{
"lang": "en",
"type": "reporter",
"value": "Oneafter (VulDB User)"
}
],
"descriptions": [
{
"lang": "en",
"value": "A flaw has been found in skvadrik re2c up to 4.4. Impacted is the function check_and_merge_special_rules of the file src/parse/ast.cc. This manipulation causes null pointer dereference. The attack can only be executed locally. The exploit has been published and may be used. Patch name: febeb977936f9519a25d9fbd10ff8256358cdb97. It is suggested to install a patch to address this issue."
}
],
"metrics": [
{
"cvssV4_0": {
"baseScore": 4.8,
"baseSeverity": "MEDIUM",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P",
"version": "4.0"
}
},
{
"cvssV3_1": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
"version": "3.1"
}
},
{
"cvssV3_0": {
"baseScore": 3.3,
"baseSeverity": "LOW",
"vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:O/RC:C",
"version": "3.0"
}
},
{
"cvssV2_0": {
"baseScore": 1.7,
"vectorString": "AV:L/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:OF/RC:C",
"version": "2.0"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-476",
"description": "NULL Pointer Dereference",
"lang": "en",
"type": "CWE"
}
]
},
{
"descriptions": [
{
"cweId": "CWE-404",
"description": "Denial of Service",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-02-22T00:32:09.412Z",
"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"shortName": "VulDB"
},
"references": [
{
"name": "VDB-347210 | skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference",
"tags": [
"vdb-entry",
"technical-description"
],
"url": "https://vuldb.com/?id.347210"
},
{
"name": "VDB-347210 | CTI Indicators (IOB, IOC, IOA)",
"tags": [
"signature",
"permissions-required"
],
"url": "https://vuldb.com/?ctiid.347210"
},
{
"name": "Submit #755030 | skvadrik re2c 04f1424 NULL Pointer Dereference",
"tags": [
"third-party-advisory"
],
"url": "https://vuldb.com/?submit.755030"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/skvadrik/re2c/issues/571"
},
{
"tags": [
"issue-tracking"
],
"url": "https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101"
},
{
"tags": [
"exploit"
],
"url": "https://github.com/oneafter/0202/blob/main/re/repro"
},
{
"tags": [
"patch"
],
"url": "https://github.com/skvadrik/re2c/commit/febeb977936f9519a25d9fbd10ff8256358cdb97"
},
{
"tags": [
"product"
],
"url": "https://github.com/skvadrik/re2c/"
}
],
"tags": [
"x_open-source"
],
"timeline": [
{
"lang": "en",
"time": "2026-02-20T00:00:00.000Z",
"value": "Advisory disclosed"
},
{
"lang": "en",
"time": "2026-02-20T01:00:00.000Z",
"value": "VulDB entry created"
},
{
"lang": "en",
"time": "2026-02-20T21:07:45.000Z",
"value": "VulDB entry last update"
}
],
"title": "skvadrik re2c ast.cc check_and_merge_special_rules null pointer dereference"
}
},
"cveMetadata": {
"assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
"assignerShortName": "VulDB",
"cveId": "CVE-2026-2903",
"datePublished": "2026-02-22T00:32:09.412Z",
"dateReserved": "2026-02-20T20:02:38.891Z",
"dateUpdated": "2026-02-26T16:21:15.725Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}