Description
ber-decoder.c in Libksba before 1.3.3 uses an incorrect integer data type, which allows remote attackers to cause a denial of service (crash) via crafted BER data, which leads to a buffer overflow.
Fixed in Linux distributions
Distributions backport fixes, so the version that fixes this vulnerability differs per release — upgrade to at least the version shown. From the distributions' security trackers and advisories.
Debian
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian 14 | libksba | 1.3.3-1 | — |
| Debian 13 | libksba | 1.3.3-1 | — |
| Debian 12 | libksba | 1.3.3-1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 16.04 LTS | libksba | 1.3.3-1ubuntu0.16.04.1 | USN-2982-1 |
| Ubuntu 14.04 LTS | libksba | 1.3.0-3ubuntu0.14.04.2 | USN-2982-1 |
Advisories 1
- USN-2982-1 libksba vulnerabilities Ubuntu Security Notices (USN) · Apr 22, 2026
References
- USN-2982-1 vendor-advisory
- [oss-security] 20160429 CVE request: three issues in libksba mailing-list
- http://git.gnupg.org/cgi-bin/gitweb.cgi?p=libksba.git%3Ba=commit%3Bh=aea7b6032865740478ca4b706850a5217f1c3887
- [oss-security] 20160429 Re: CVE request: three issues in libksba mailing-list
- GLSA-201604-04 vendor-advisory