PT-2026-95881

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.100.1 Description An issue allows SMTP smuggling, a technique where a sender can bypass security filters to deliver messages that differ from what the sending server recorded. This occurs when the received message...

PT-2026-95878

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.100.1 Description An out-of-bounds write occurs when Proxy-Protocol is used with a proxy controlled by an attacker. An out-of-bounds write is a memory corruption error where data is written outside the intended boundar...

PT-2026-95880

Name of the Vulnerable Software and Affected Versions Exim versions prior to 4.100.1 Description When Proxy-Protocol is used with an attacker-controlled proxy, the software allows attackers to read certain uninitialized data from stack memory. Recommendations Update to version 4.100.1 or later...

CVE-2026-94056: Use of Uninitialized Resource

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, allows attackers to read certain uninitialized data from stack memory...

CVE-2026-94054: Out-of-bounds Write

Exim before 4.100.1, when Proxy-Protocol is used with an attacker-controlled proxy, has an out-of-bounds write...

CVE-2026-94055: Use After Free

Exim before 4.100.1, when certain non-default TLS settings are used with GnuTLS, has a use-after-free...

CVE-2026-94057: Improper Neutralization of CRLF Sequences

Exim before 4.100.1 allows SMTP smuggling in which the received message does not match any sent message, and instead depends on crafted data sent after a rejection during DATA processing...

Astra Linux – Vulnerability in exim4

Exim dnsdb Out-of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the SMTP...

Astra Linux – Vulnerability in libspf2

Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. The specific flaw exists within the parsing o...

Astra Linux – Vulnerability in exim4

Exim 4.98 before 4.98.1 allowed remote SQL injection when SQLite hints and ETRN serialization were used. Resolving SQL injection requires an update to 4.99.1 in certain non-default rate-limit configurations...

Astra Linux – Vulnerability in exim4

In Exim versions before 4.99.2, when the SPA authentication driver is used with an adversarial SPA resource, there can be a vulnerability where an out-of-bounds write could cause the connection instance to crash, or erroneous data processing could lead to data being leaked from uninitialized heap...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 has an improper neutralization of line delimiters. Local users can alter the behavior of root processes because a recipient address may contain a newline character...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 has an improper neutralization of line delimiters, which is relevant in non-default configurations that enable Delivery Status Notification DSN. Certain uses of ORCPT= can cause a new line to be inserted into a spool header file, thereby indirectly allowing unauthenticated...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 allowed execution with unnecessary privileges. Since Exim operates as root in the spool directory owned by a non-root user, an attacker could write to the /var/spool/exim4/input spool header file. A crafted recipient address in that file could indirectly lead to command...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 has an improper initialization issue that can lead to recursive stack consumption or other consequences. This occurs because the use of certain getc functions is handled incorrectly when a client uses BDAT instead of DATA...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 allows Out-of-bounds Read because pdkimfinishbodyhash does not validate the relationship between sig-bodyhash.len and b-bh.len; thus, a crafted DKIM-Signature header might lead to the leakage of sensitive information from process memory...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 allowed execution with unnecessary privileges. Since Exim operates as root in the log directory which is owned by a non-root user, a symlink or hard link attack could allow overwriting of critical root-owned files anywhere in the filesystem...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 allowed integer overflow to lead to a buffer overflow in the receiveaddrecipient function, through an email message with fifty million recipients. NOTE: Remote exploitation might be difficult due to resource consumption...

Astra Linux – Vulnerability in exim4

Exim 4 before 4.94.2 allows Integer Overflow to Buffer Overflow, because getstdinput allows unbounded reads that are accompanied by unbounded increases in a certain size variable. NOTE: Exploitation may be impractical due to the execution time required to cause an overflow multiple days...

Astra Linux – Vulnerability in exim4

In versions of Exim up to 4.97.1, Misparse processes multi-line RFC 2231 header filenames. As a result, remote attackers can bypass the protection mechanism that blocks $mimefilename extensions, and potentially deliver executable attachments to the mailboxes of end users...