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    CVE-2022-3559

    A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a patch to fix this issue. The identifier VDB-211073 was assigned to this vulnerability.

    Published:Oct 17, 2022
    Last Modified:Nov 3, 2025
    EPS:Oct 17, 2022
    EPSS Score:0.00219
    CVSS Score:4.6

    Affected Products

    Vendor
    Exim
    Product
    Exim
    Vendor
    Fedoraproject
    Product
    Fedora

    Exploits

    No exploit reference

    Related CVEs

    CVE-2026-66141 (CVSS 7.4) — Exim before 4.99.5 allows .forward privilege escalation because force_command for a pipe transport is mishandl…
    CVE-2026-66140 (CVSS 8.4) — Exim before 4.99.5 allows directory traversal to access files outside of the spool area, and consequently gain…
    CVE-2026-48840 (CVSS 5.3) — Exim 4.88 before 4.99.4, in some proxy configurations, mishandles certain short payloads, leading to disclosur…
    CVE-2026-45185 (CVSS 9.8) — Exim before 4.99.3, in certain GnuTLS configurations, has a remotely reachable use-after-free in the BDAT body…
    CVE-2026-40686 (CVSS 3.7) — In Exim before 4.99.2, when utf8 operators are enabled, there is an out-of-bounds read if large UTF-8 trailing…
    CVE-2026-40684 (CVSS 5.9) — In Exim before 4.99.2, on systems using musl libc (not glibc), an attacker can crash the connection instance w…
    CVE-2026-40687 (CVSS 4.8) — In Exim before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can …
    CVE-2026-40685 (CVSS 6.5) — In Exim before 4.99.2, when JSON lookup is enabled, an out-of-bounds heap write can occur when a JSON operator…
    CVE-2025-67896 (CVSS 7) — Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer over…
    CVE-2025-53881 (CVSS 6.9) — A UNIX Symbolic Link (Symlink) Following vulnerability in logrotate config in the exim package allowed privile…

    References

    https://bugs.exim.org/show_bug.cgi?id=2915
    https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/
    https://vuldb.com/?id.211073
    https://bugs.exim.org/show_bug.cgi?id=2915
    https://git.exim.org/exim.git/commit/4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2
    https://lists.debian.org/debian-lts-announce/2024/10/msg00029.html
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/EIH4W5R7SHTUEQFWWKB4TUO5YFZX64KV/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TMQ6OCKPNPBPSD37YR4FOWV2R54M2UEP/
    https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WFHLZVHNNO2GWYP5EA4TZQZ5O4GVPARR/
    https://vuldb.com/?id.211073

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High