CVE-2005-1515: Integer signedness error in the qmail_put and substdio_put functions in qmail, when running on 64 bit platform

This month

MEDIUM 5.0MITIGATE

CVE-2005-1515 is a medium-severity flaw (CVSS 5.0) affecting qmail. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Integer signedness error in the qmail_put and substdio_put functions in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote attackers to cause a denial of service and possibly execute arbitrary code via a large number of SMTP RCPT TO commands.

Why this priority

EPSS top 6%: very likely to be exploited
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	5.0 (Medium)
EPSS exploit chance	6.5% (top 6%)
CISA exploited list	No
Published	2005-05-11
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: dan bernstein

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2005-05-11 04:00 UTCPublished CVE record published
2026-06-16 22:13 UTCUpdated Record last modified

dan bernstein qmail MITIGATE

Affected: all versions

Fixed in: no fixed release known

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy qmail || rpm -q qmail || qmail --version

No fixed or unaffected release known

Apply the vendor mitigation from the advisory, disable the affected feature, or restrict network access.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2005-1515?

qmail: mitigate or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2005-1515 being exploited?

CVE-2005-1515 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2005-1515 affect?

CVE-2005-1515 affects qmail. Severity is medium (CVSS 5.0). Integer signedness error in the qmail_put and substdio_put functions in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote attackers to cause a denial of service and possibly execute arbitrary code

How urgent is CVE-2005-1515?

Priority 46/100. EPSS top 6%: very likely to be exploited; Public exploit reference

Related CVEs

CVE-2005-1514 MEDIUM 5.0 MITIGATE commands.c in qmail, when running on 64 bit platforms with a large amount of virtual memory, allows remote att
CVE-2005-1513 CRITICAL 9.8 MITIGATE MITIGATE Integer overflow in the stralloc_readyplus function in qmail, when running on 64 bit platforms with a large am

References

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