DEBIAN-CVE-2026-118769
Dashboard / Vulnerabilities / DEBIAN-CVE-2026-118769
Summary:
Details: Botan is a C++ cryptography library. From 2.1.0 until 3.13.0, the Botan C API function botan_block_cipher_block_size converted a size_t block size to int without a bounds check. In an application that accepts external algorithm parameter strings and uses the FFI raw ECB mode, an attacker can select the variable-block-size Lion cipher so that the reported size is truncated, the caller allocates insufficient memory, and later block processing causes memory corruption. The C++ API and normally used C API modes such as CBC and CTR are unaffected. This issue is fixed in version 3.13.0.
Affected packages
Package
Name: botan
Purl: pkg:deb/debian/botan?arch=source&distro=bookworm
Affected ranges
Type: ECOSYSTEM
Events:
Introduced- 0
Fixed -None
Affected versions
2.19.3+dfsg-1
2.19.3+dfsg-1+deb12u1
2.19.4+dfsg-1
2.19.5+dfsg-1
2.19.5+dfsg-2
2.19.5+dfsg-3
2.19.5+dfsg-4
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
