#1002926 firefox-esr: memory corruption since 91.4 ESR

Package:
firefox-esr
Source:
firefox-esr
Description:
Mozilla Firefox web browser - Extended Support Release (ESR)
Submitter:
Martin-Éric Racine
Date:
2026-01-10 11:39:17 UTC
Severity:
important
#1002926#5
Date:
2022-01-01 12:30:34 UTC
From:
To:
As per the attached screenshot, since 91.4 ESR replaced 78.15 ESR in Stable, the content inside Firefox-ESR is randomly corrup.

- -- Addons package information
ii  firefox-esr         91.4.1esr-1~deb11u1 amd64        Mozilla Firefox web browser - Extended Support Release (ESR)
ii  firefox-esr-l10n-fi 91.4.1esr-1~deb11u1 all          Finnish language package for Firefox ESR

- -- System Information:
Debian Release: 11.2
  APT prefers stable-updates
  APT policy: (500, 'stable-updates'), (500, 'stable-security'), (500, 'stable-debug'), (500, 'stable')
Architecture: amd64 (x86_64)

Kernel: Linux 5.10.0-10-amd64 (SMP w/8 CPU threads)
Locale: LANG=fi_FI.utf8, LC_CTYPE=fi_FI.utf8 (charmap=UTF-8), LANGUAGE=fi:en
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages firefox-esr depends on:
ii  debianutils          4.11.2
ii  fontconfig           2.13.1-4.2
ii  libatk1.0-0          2.36.0-2
ii  libc6                2.31-13+deb11u2
ii  libcairo-gobject2    1.16.0-5
ii  libcairo2            1.16.0-5
ii  libdbus-1-3          1.12.20-2
ii  libdbus-glib-1-2     0.110-6
ii  libevent-2.1-7       2.1.12-stable-1
ii  libffi7              3.3-6
ii  libfontconfig1       2.13.1-4.2
ii  libfreetype6         2.10.4+dfsg-1
ii  libgcc-s1            10.2.1-6
ii  libgdk-pixbuf-2.0-0  2.42.2+dfsg-1
ii  libglib2.0-0         2.66.8-1
ii  libgtk-3-0           3.24.24-4
ii  libpango-1.0-0       1.46.2-3
ii  libstdc++6           10.2.1-6
ii  libvpx6              1.9.0-1
ii  libx11-6             2:1.7.2-1
ii  libx11-xcb1          2:1.7.2-1
ii  libxcb-shm0          1.14-3
ii  libxcb1              1.14-3
ii  libxcomposite1       1:0.4.5-1
ii  libxdamage1          1:1.1.5-2
ii  libxext6             2:1.3.3-1.1
ii  libxfixes3           1:5.0.3-2
ii  libxrender1          1:0.9.10-1
ii  procps               2:3.3.17-5
ii  zlib1g               1:1.2.11.dfsg-2

Versions of packages firefox-esr recommends:
ii  libavcodec58  7:4.3.3-0+deb11u1

Versions of packages firefox-esr suggests:
pn  fonts-lmodern          <none>
pn  fonts-stix | otf-stix  <none>
ii  libcanberra0           0.30-7
ii  libgssapi-krb5-2       1.18.3-6+deb11u1
ii  pulseaudio             14.2-2

- -- no debconf information
-----BEGIN PGP SIGNATURE-----
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=UiV4
-----END PGP SIGNATURE-----

#1002926#10
Date:
2026-01-10 10:08:08 UTC
From:
To:
Es gibt eine Familienspende in Höhe von 1.850.000,00 USD von Cheng Charlie
Saephan. Bitte antworten Sie für weitere Informationen. Denken Sie daran,
Ihrer Familie und den Bedürftigen in Ihrer Umgebung Gutes zu tun.

Dies ist bereits der zweite Versuch, Sie zu erreichen. Bitte antworten Sie
für weitere Details.