Monthly report about Debian Long Term Support, May 2026

The Debian LTS Team, funded by Freexian’s Debian LTS offering, is pleased to report its activities for May.

Activity summary

During the month of May, 21 contributors have been paid to work on Debian LTS (links to individual contributor reports are located below).

The team released 56 DLAs fixing 877 CVEs.

May was a much busier month than usual, especially due to the disclosed vulnerabilities on linux regarding Local Privilege Escalation (LPE), that included public proof-of-concept (PoC) exploits. These reports of course impacted Debian as a whole, and the situation warrants a special mention to the Kernel Team, especially Ben Hutching and Salvatore Bonaccorso, who faced the pace and released linux packages on a weekly basis. On the LTS side, the Front Desk team also triaged a significant flow of high severity CVEs.

It is also important to note that Debian 12 (“bookworm”) will be handed over to the LTS Team on June 11th. If you benefit from Debian, especially during the full 5-year lifecycle, please consider subscribing as a sponsor of Debian LTS: https://www.freexian.com/lts/debian/.

Moreover, Debian 11 (“bullseye”) will reach the end of the Debian LTS period on August 31st. After that, Freexian will continue the security support under the Extended LTS offer.

The team published several notable updates:

  • As mentioned above, several exploitable LPE vulnerabilities in linux were published during May. Ben released the following DLAs for the Debian LTS versions:
  • exim update (DLA-4580-1), prepared by Thorsten, to address a vulnerability that may result in remote code execution.
  • gnutls28 update (DLA-4595-1) by Guilhem Moulin, fixes several vulnerabilities that may result in execution of arbitrary code, information leak, authentication bypass, among other impacts.
  • krb5 updates released as DLA-4603-1, fixing two vulnerabilities that may yield to a denial of service. Updated prepared by Emmanuel Arias
  • lemonldap-ng (DLA-4602-1), released by Abhijith PA, fixing multiple vulnerabilities
  • Two imagemagick updates (DLA-4559-1 and DLA-4609-1), prepared by Bastien Roucariès, fixing several vulnerabilities
  • openjdk-11 and openjdk-17 updates (DLA-4566-1 and DLA-4565-1), both prepared by Emilio, to fix seven vulnerabilities.
  • php7.4 update (DLA-4586-1) to fix six vulnerabilities that could result in remote code execution, information disclosure or denial of service. Update prepared by Guilhem Moulin.
  • python3.9 update (DLA-4583-1), prepared by Arnaud Rebillout, addressing multiple vulnerabilities.

Contributions from outside the LTS Team:

We are greatly thankful for the contributions from people outside the LTS Team:

  • Colin Watson prepared an OpenSSH update, that was released by Santiago as DLA-4584-1.
  • Thomas Goirand handled a keystone update, whose advisory was done by Santiago and released as DLA-4611-1.
  • Christopher Obbard kindly prepared a sentry-python update, released as DLA-4612-1.
  • Christoph Goehre made two thunderbird updates (DLA-4562-1 and DLA-4582-1). As is customary, Emilio released the advisories.

The LTS Team has also contributed with updates to the latest Debian releases:

Moreover, thanks to our partnership with Catalyst, it has been possible to extend the support for Samba 4.17, the version shipped with Debian 12. In May, several vulnerabilities were disclosed, and their patches were prepared by Catalyst. For Debian 12, the update was prepared by the Samba maintainer and released as DSA-6297-1.

Individual Debian LTS contributor reports

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