Low
re2c — security advisory
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.
- Products
- re2c
- Affected versions
- 2.0.3-1build1, 2.2-1, 3.0-1, 3.1-1, 3.1-1build1, 4.1-1, 4.3-2, 4.3.1-1, 4.4-1, 4.5.1-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-2903
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:58 UTC · Revision 1
Source evidence
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.
osv:UBUNTU-CVE-2026-2903
re2c
Fixed versions: Not specified
re2c
Fixed versions: Not specified
re2c
Fixed versions: Not specified
re2c
Fixed versions: Not specified
re2c
Fixed versions: Not specified
Complete source record
{
"id": "45eaf6bff31dce9641724a9001c3bb9bda77d555ba706aa73abbba24aea8d94a",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-2903",
"method": "structured",
"payload": {
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"title": "UBUNTU-CVE-2026-2903",
"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.",
"evidence": "osv:UBUNTU-CVE-2026-2903",
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],
"modified": "2026-10-17T12:59:57.583583561Z",
"provider": "osv",
"upstream": [
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"references": [
"https://ubuntu.com/security/CVE-2026-2903",
"https://www.cve.org/CVERecord?id=CVE-2026-2903",
"https://github.com/oneafter/0202/blob/main/re/repro",
"https://github.com/skvadrik/re2c/",
"https://github.com/skvadrik/re2c/issues/571#issuecomment-3837675101",
"https://vuldb.com/?ctiid.347210",
"https://vuldb.com/?id.347210",
"https://vuldb.com/?submit.755030"
]
},
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"evidence": "/upstream"
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"security_relevant": true,
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},
"source_id": "core-osv",
"document_id": 360035,
"published_at": "2026-02-22T01:16:00+00:00"
}