CVE-2022-37451: exim exim – CVSS 7.5 · Watchpost

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CVE-2022-37451

HIGH 7.5CVE-2022-37451 · Published 06/08/2022 · updated 17/06/2026

In short

CVE-2022-37451 is a HIGH (CVSS 7.5) vulnerability affecting exim (exim).
Chance of exploitation in the next 30 days (EPSS): 3.3%, higher than 88.5% of all vulnerabilities.
Fix: update to 4.96 or later.

Package	Affected versions	Patched versions
exim exim	`< 4.96`	`4.96`

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.

References

cwe.mitre.org/data/definitions/762.html · Third Party Advisory
Exim/exim commit 51be321 · Patch
Exim/exim · Release Notes
Exim/exim · Release Notes
ivd38/exim_invalid_free · Exploit
lists.exim.org/lurker/message/20220625.141825.d6de6074.en.html · Mailing List
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LETR5CVDPFOFQHXCJP6NFLG52JZHQYDY
lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XSWDF4QEXD4TDWQLYQOWCHBJKTDQR4Z7
exim.org/static/doc/security · Vendor Advisory
openwall.com/lists/oss-security/2022/08/06/1 · Mailing List

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