CVE-2022-3437A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The…
- 4.3MediumCVSS base score
- 4.0%Exploitation in 30 daysEPSS · top 9.3% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
A heap-based buffer overflow vulnerability was found in Samba within the GSSAPI unwrap_des() and unwrap_des3() routines of Heimdal. The DES and Triple-DES decryption routines in the Heimdal GSSAPI library allow a length-limited write buffer overflow on malloc() allocated memory when presented with a maliciously small packet. This flaw allows a remote user to send specially crafted malicious data to the application, possibly resulting in a denial of service (DoS) attack.
Timeline
ID reserved
By redhat
- 3 months later
· 3 months later
Published
- 22 months later
· 22 months later
Record updated
Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| CISA-ADPADP (enrichment) | 3.1 | Medium4.3 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L |
| NVDNVD · Modified | 3.1 | Medium6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 4.0% · top 9.3% of all CVEs (12 Nov 2026)
- CISA SSVC
- Exploitation: none · Automatable: no · Technical impact: partial
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 4.3.
Affected products
samba
- affected Fixed in samba 4.15.11, samba 4.16.6, samba 4.17.2.
References
References8
- https://bugzilla.redhat.com/show_bug.cgi?id=2137774 (opens in a new tab)x_transferred
- https://www.samba.org/samba/security/CVE-2022-3437.html (opens in a new tab)x_transferred
- https://access.redhat.com/security/cve/CVE-2022-3437 (opens in a new tab)x_transferred
- [oss-security] 20230208 [vs] heimdal: CVE-2022-45142: signature validation failure (opens in a new tab)mailing-listx_transferred
- https://security.netapp.com/advisory/ntap-20230216-0008/ (opens in a new tab)x_transferred
- GLSA-202309-06 (opens in a new tab)vendor-advisoryx_transferred
- GLSA-202310-06 (opens in a new tab)vendor-advisoryx_transferred
- [debian-lts-announce] 20240422 [SECURITY] [DLA 3792-1] samba security update (opens in a new tab)mailing-listx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- EUVD EUVD-2022-42813 (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Badge for a README or a ticket
[](https://cveledger.app/cve/CVE-2022-3437)Record last updated .