CVE-2026-7323 (GCVE-0-2026-7323)

Vulnerability from cvelistv5 – Published: 2026-04-28 13:49 – Updated: 2026-06-30 12:10
VLAI
Title
Memory safety bugs fixed in Thunderbird ESR 140.10.1 and Thunderbird 150.0.1
Summary
Memory safety bugs present in Thunderbird ESR 140.10.0 and Thunderbird 150.0.0. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability was fixed in Firefox 150.0.1, Firefox ESR 140.10.1, Thunderbird 150.0.1, and Thunderbird 140.10.1.
Severity
7.3 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-119 - Improper Restriction of Operations within the Bounds of a Memory Buffer
  • CWE-787 - Out-of-bounds Write
Assigner
References
URL Tags
https://bugzilla.mozilla.org/buglist.cgi?bug_id=2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://www.mozilla.org/security/advisories/mfsa2…
https://access.redhat.com/security/cve/CVE-2026-7323 vdb-entryx_refsource_REDHAT
https://bugzilla.redhat.com/show_bug.cgi?id=2463481 issue-trackingx_refsource_REDHAT
https://security.access.redhat.com/data/csaf/v2/v… x_sadp-csaf-vex
https://access.redhat.com/errata/RHSA-2026:22708 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22408 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24719 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19157 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19153 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19588 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:20586 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22712 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24718 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24345 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:25014 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22847 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24717 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:21743 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22410 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24844 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22324 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24846 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:22409 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:24721 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19370 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2026:19348 vendor-advisoryx_refsource_REDHAT
Impacted products
Vendor Product Version
Mozilla Firefox Unaffected: 140.10.1 , ≤ 140.* (rpm)
Unaffected: 150.0.1 , ≤ * (rpm)
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Mozilla Thunderbird Unaffected: 140.10.1 , ≤ 140.* (rpm)
Unaffected: 150.0.1 , ≤ * (rpm)
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Red Hat Red Hat Enterprise Linux Server (v. 7 ELS)     cpe:/o:redhat:rhel_els:7
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Red Hat Red Hat Enterprise Linux AppStream EUS (v. 10.0)     cpe:/o:redhat:enterprise_linux_eus:10.0
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Red Hat Red Hat Enterprise Linux AppStream (v. 10)     cpe:/o:redhat:enterprise_linux:10.2
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Red Hat Red Hat Enterprise Linux AppStream (v. 8)     cpe:/a:redhat:enterprise_linux:8::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.4)     cpe:/a:redhat:rhel_aus:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.4)     cpe:/a:redhat:rhel_eus_long_life:8.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream AUS (v.8.6)     cpe:/a:redhat:rhel_aus:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS EXTENSION (v.8.6)     cpe:/a:redhat:rhel_eus_long_life:8.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.8.8)     cpe:/a:redhat:rhel_e4s:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream TUS (v.8.8)     cpe:/a:redhat:rhel_tus:8.8::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.0)     cpe:/a:redhat:rhel_e4s:9.0::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.2)     cpe:/a:redhat:rhel_e4s:9.2::appstream
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Red Hat Red Hat Enterprise Linux AppStream E4S (v.9.4)     cpe:/a:redhat:rhel_e4s:9.4::appstream
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Red Hat Red Hat Enterprise Linux AppStream EUS (v.9.6)     cpe:/a:redhat:rhel_eus:9.6::appstream
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Red Hat Red Hat Enterprise Linux AppStream (v. 9)     cpe:/a:redhat:enterprise_linux:9::appstream
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Red Hat Red Hat Enterprise Linux 10     cpe:/o:redhat:enterprise_linux:10
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Red Hat Red Hat Enterprise Linux 6     cpe:/o:redhat:enterprise_linux:6
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Red Hat Red Hat Enterprise Linux 7     cpe:/o:redhat:enterprise_linux:7
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Credits
Ryan Hunt, Steve Fink and the Mozilla Fuzzing Team
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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.