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CVE-2022-37451
Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc.
- 7.5HighCVSS base score
- 3.3%Exploitation in 30 daysEPSS · top 11% of all CVEs
- NoKnown exploitednot in CISA's KEV catalog
- NonePublic exploitsnone known yet
Description
Exim before 4.96 has an invalid free in pam_converse in auths/call_pam.c because store_free is not used after store_malloc.
Timeline
ID reserved
By mitre
Published
- 24 months later
· 24 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 |
|---|---|---|---|
| NVDNVD · Modified | 3.1 | High7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
- EPSS (exploitation in 30 days)
- 3.3% · top 11% of all CVEs (11 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.5.
Affected products
n/a
- affected n/a
References
References10
- https://github.com/Exim/exim/wiki/EximSecurity (opens in a new tab)x_refsource_MISCx_transferred
- https://www.exim.org/static/doc/security/ (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/ivd38/exim_invalid_free (opens in a new tab)x_refsource_MISCx_transferred
- https://www.openwall.com/lists/oss-security/2022/08/06/1 (opens in a new tab)x_refsource_MISCx_transferred
- https://lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html (opens in a new tab)x_refsource_MISCx_transferred
- https://cwe.mitre.org/data/definitions/762.html (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/Exim/exim/compare/exim-4.95...exim-4.96 (opens in a new tab)x_refsource_MISCx_transferred
- https://github.com/Exim/exim/commit/51be321b27825c01829dffd90f11bfff256f7e42 (opens in a new tab)x_refsource_MISCx_transferred
- FEDORA-2022-1ca1d22165 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_transferred
- FEDORA-2022-f9a8388e62 (opens in a new tab)vendor-advisoryx_refsource_FEDORAx_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-2022-40077 (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-2022-37451)Record last updated .