An update for thunderbird is now available for Red Hat Enterprise Linux 8.2
 Advanced Update Support.

Red Hat Product Security has rated this update as having a security impact of
 Important. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Mozilla Thunderbird is a standalone mail and newsgroup client.

Security Fix(es):

* firefox: thunderbird: Memory safety bugs fixed in Firefox 135, Thunderbird
 135, Firefox ESR 128.7, and Thunderbird 128.7 (CVE-2025-1017)

* firefox: thunderbird: Use-after-free in Custom Highlight (CVE-2025-1010)

* firefox: thunderbird: Memory safety bugs fixed in Firefox 135, Thunderbird
 135, Firefox ESR 115.20, Firefox ESR 128.7, Thunderbird 115.20, and Thunderbird 128.7 (CVE-2025-1016)

* firefox: thunderbird: Potential opening of private browsing tabs in normal
 browsing windows (CVE-2025-1013)

* firefox: thunderbird: A bug in WebAssembly code generation could result in a
 crash (CVE-2025-1011)

* thunderbird: Unsanitized address book fields (CVE-2025-1015)

* firefox: thunderbird: Use-after-free in XSLT (CVE-2025-1009)

* thunderbird: Address of e-mail sender can be spoofed by malicious email
 (CVE-2025-0510)

* firefox: thunderbird: Certificate length was not properly checked
 (CVE-2025-1014)

* firefox: thunderbird: Use-after-free during concurrent delazification
 (CVE-2025-1012)

For more details about the security issue(s), including the impact, a CVSS
 score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

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CVE-2025-0510: User Interface (UI) Misrepresentation of Critical Information
 (CWE-451)
CVE-2025-1009: Use After Free (CWE-416)
CVE-2025-1010: Use After Free (CWE-416)
CVE-2025-1011: Improper Restriction of Operations within the Bounds of a Memory
 Buffer (CWE-119)
CVE-2025-1012: Use After Free (CWE-416)
CVE-2025-1013: Concurrent Execution using Shared Resource with Improper
 Synchronization ('Race Condition') (CWE-362)
CVE-2025-1014: Improper Validation of Specified Quantity in Input (CWE-1284)
CVE-2025-1015: URL Redirection to Untrusted Site ('Open Redirect')
 (CWE-601)
CVE-2025-1016: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)
CVE-2025-1017: Buffer Copy without Checking Size of Input ('Classic Buffer
 Overflow') (CWE-120)