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CVSS: 10.0EPSS: 0%CPEs: 34EXPL: 0

04 Mar 2025 — Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. 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 affects Firefox < 136 and Firefox ESR < 128.8. Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs showed evidence of memory corruption and we presume that with eno... • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1922889%2C1935004%2C1943586%2C1943912%2C1948111 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-787: Out-of-bounds Write •

CVSS: 10.0EPSS: 0%CPEs: 34EXPL: 0

04 Mar 2025 — Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. 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 affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8. Memory safety bugs present in Firefox 135, Thunderbird 135, Firefox ESR 115.20, Firefox ESR 128.7, and Thunderbird 128.7. Some of these bugs sh... • https://bugzilla.mozilla.org/buglist.cgi?bug_id=1938471%2C1940716 • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') CWE-1260: Improper Handling of Overlap Between Protected Memory Ranges •

CVSS: 5.0EPSS: 0%CPEs: 34EXPL: 0

04 Mar 2025 — A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136 and Firefox ESR < 128.8. A web page could trick a user into setting that site as the default handler for a custom URL protocol. This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8. Multiple security issues were discovered in Firefox. • https://bugzilla.mozilla.org/show_bug.cgi?id=1866661 • CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

CVSS: 7.8EPSS: 0%CPEs: 34EXPL: 0

04 Mar 2025 — It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability affects Firefox < 136 and Firefox ESR < 128.8. It was possible to interrupt the processing of a RegExp bailout and run additional JavaScript, potentially triggering garbage collection when the engine was not expecting it. This vulnerability affects Firefox < 136, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbir... • https://bugzilla.mozilla.org/show_bug.cgi?id=1942881 • CWE-460: Improper Cleanup on Thrown Exception •

CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 0

04 Mar 2025 — A select option could partially obscure the confirmation prompt shown before launching external apps. This could be used to trick a user in to launching an external app unexpectedly. *This issue only affects Android versions of Firefox.* This vulnerability affects Firefox < 136. • https://bugzilla.mozilla.org/show_bug.cgi?id=1908488 • CWE-1021: Improper Restriction of Rendered UI Layers or Frames •

CVSS: 9.0EPSS: 0%CPEs: 34EXPL: 0

04 Mar 2025 — On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8. On 64-bit CPUs, when the JIT compiles WASM i32 return values they can pick up bits from left over memory. This can potentially cause them to be treated as a different type. • https://bugzilla.mozilla.org/show_bug.cgi?id=1946004 • CWE-843: Access of Resource Using Incompatible Type ('Type Confusion') •

CVSS: 9.0EPSS: 0%CPEs: 34EXPL: 0

04 Mar 2025 — It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, and Firefox ESR < 128.8. It was possible to cause a use-after-free in the content process side of a WebTransport connection, leading to a potentially exploitable crash. This vulnerability affects Firefox < 136, Firefox ESR < 115.21, Firefox ESR < 128.8, Thunderbird < 136, and Thunderbird < 128.8. Multip... • https://bugzilla.mozilla.org/show_bug.cgi?id=1944126 • CWE-416: Use After Free •

CVSS: 7.5EPSS: 0%CPEs: 3EXPL: 0

04 Mar 2025 — Android apps can load web pages using the Custom Tabs feature. This feature supports a transition animation that could have been used to trick a user into granting sensitive permissions by hiding what the user was actually clicking. This vulnerability affects Firefox < 136. • https://bugzilla.mozilla.org/show_bug.cgi?id=1928334 • CWE-359: Exposure of Private Personal Information to an Unauthorized Actor •

CVSS: 7.8EPSS: 0%CPEs: 35EXPL: 0

25 Feb 2025 — A use-after-free flaw was found in X.Org and Xwayland. When changing an alarm, the values of the change mask are evaluated one after the other, changing the trigger values as requested, and eventually, SyncInitTrigger() is called. If one of the changes triggers an error, the function will return early, not adding the new sync object, possibly causing a use-after-free when the alarm eventually triggers. This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server... • https://access.redhat.com/security/cve/CVE-2025-26601 • CWE-416: Use After Free •

CVSS: 7.8EPSS: 0%CPEs: 35EXPL: 0

25 Feb 2025 — A use-after-free flaw was found in X.Org and Xwayland. When a device is removed while still frozen, the events queued for that device remain while the device is freed. Replaying the events will cause a use-after-free. This vulnerability allows local attackers to escalate privileges on affected installations of X.Org Server. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability. The specific flaw exists within the handling of devi... • https://access.redhat.com/security/cve/CVE-2025-26600 • CWE-416: Use After Free •