Description
Crypt::PBKDF2 versions before 0.261630 for Perl have a weak default algorithm and number of iterations.
The default algorithm is HMAC-SHA1, which should only be used for legacy systems.
These versions default to using 1000 iterations.
Depending on the chosen algorithm, 220,000 to 1,400,000 iterations should be used.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| ARODLAND | Crypt::PBKDF2 | < 0.261630 | 0.261630 |
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 | libcrypt-pbkdf2-perl | 0.261630-1 | — |
| Debian 13 | libcrypt-pbkdf2-perl | 0.261630-1~deb13u1 | — |
| Debian 12 | libcrypt-pbkdf2-perl | 0.261630-1~deb13u1~deb12u1 | — |
Ubuntu
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 26.10 | libcrypt-pbkdf2-perl | No fix yet | — |
| Ubuntu 26.04 LTS | libcrypt-pbkdf2-perl | No fix yet | — |
| Ubuntu 25.10 | libcrypt-pbkdf2-perl | No fix yet | — |
| Ubuntu 24.04 LTS | libcrypt-pbkdf2-perl | No fix yet | — |
| Ubuntu 22.04 LTS | libcrypt-pbkdf2-perl | No fix yet | — |
Show 3 more (older releases, extended support, other products)Fewer releases
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Ubuntu 20.04 LTS | libcrypt-pbkdf2-perl | No fix yet | — |
| Ubuntu 18.04 LTS | libcrypt-pbkdf2-perl | No fix yet | — |
| Ubuntu 16.04 LTS | libcrypt-pbkdf2-perl | No fix yet | — |
openSUSE
Security tracker ↗| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| openSUSE Tumbleweed | perl-Crypt-PBKDF2 | 0.261630-1.1 | openSUSE-SU-2026:11034-1 |
Amazon Linux
| Release | Package | Fixed in | Advisory |
|---|---|---|---|
| Amazon Linux 2023 | perl-Crypt-PBKDF2 | 0.261630-1.amzn2023.0.1 | ALAS2023-2026-1891 |
Advisories 2
- ALAS2023-2026-1891 Moderate: perl-Crypt-PBKDF2 security update (Amazon Linux 2023) Amazon Linux Security Center (ALAS) · Jun 22, 2026
- openSUSE-SU-2026:11034-1 perl-Crypt-PBKDF2-0.261630-1.1 on GA media SUSE / openSUSE Security Updates · Jun 16, 2026