HighFix available
glibc, gnulib — security advisory
In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of service (assertion failure and application exit) or trigger an incorrect result by attempting a regular-expression match.
- Products
- glibc, gnulib
- Affected versions
- Not specified
- Fixed versions
- 2.28-1, 20140202+stable-3.2
- CVEs
- CVE-2009-5155
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 23:48 UTC · Revision 1
Source evidence
In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of service (assertion failure and application exit) or trigger an incorrect result by attempting a regular-expression match.
osv:DEBIAN-CVE-2009-5155
glibc
Fixed versions: 2.28-1
glibc
Fixed versions: 2.28-1
glibc
Fixed versions: 2.28-1
gnulib
Fixed versions: 20140202+stable-3.2
gnulib
Fixed versions: 20140202+stable-3.2
gnulib
Fixed versions: 20140202+stable-3.2
Complete source record
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"url": "https://osv.dev/vulnerability/DEBIAN-CVE-2009-5155",
"method": "structured",
"payload": {
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"title": "DEBIAN-CVE-2009-5155",
"summary": "In the GNU C Library (aka glibc or libc6) before 2.28, parse_reg_exp in posix/regcomp.c misparses alternatives, which allows attackers to cause a denial of service (assertion failure and application exit) or trigger an incorrect result by attempting a regular-expression match.",
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],
"modified": "2026-10-23T18:00:09.661735281Z",
"provider": "osv",
"upstream": [
"CVE-2009-5155"
],
"references": [
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]
},
"related_cves": [
{
"value": "CVE-2009-5155",
"evidence": "/upstream"
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],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 419340,
"published_at": "2019-02-26T02:29:00.277+00:00"
}