An update for firefox is now available for openEuler-24.03-LTS Security Advisory openeuler-security@openeuler.org openEuler security committee openEuler-SA-2026-2394 Final 1.0 1.0 2026-05-22 Initial 2026-05-22 2026-05-22 openEuler SA Tool V1.0 2026-05-22 firefox security update An update for firefox is now available for openEuler-24.03-LTS Mozilla Firefox is an open-source web browser, designed for standards compliance, performance and portability. %if 0 %global moz_debug_prefix /lib/debug %global moz_debug_dir /lib/debug/ %global uname_m %(uname -m) %global symbols_file_name -.en-US.-%(uname.crashreporter-symbols.zip %global symbols_file_path /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip %global _find_debuginfo_opts -p /lib/debug//-.en-US.-%(uname.crashreporter-symbols.zip -o debugcrashreporter.list %global crashreporter_pkg_name mozilla-crashreporter--debuginfo Security Fix(es): A critical vulnerability has been discovered in Mozilla Firefox browser versions up to 150.0.2, classified as CWE-119 buffer error. The vulnerability allows the product to read from or write to memory locations outside the intended boundary of the buffer when performing operations on a memory buffer. This vulnerability affects confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8388) A vulnerability was found in Mozilla Firefox up to 150.0.2 (Web Browser). It has been declared as critical. As an impact it is known to affect confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability.(CVE-2026-8391) A sandbox escape vulnerability exists in the Profile Backup component of Mozilla Firefox. This vulnerability affects Firefox versions up to 150.0.2 and was fixed in version 150.0.3. An attacker could potentially exploit this vulnerability to bypass sandbox protections, impacting the confidentiality, integrity, and availability of the system.(CVE-2026-8401) Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8946) Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8947) Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8949) Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8950) Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8953) Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8954) Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8955) Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8956) Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8957) Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8958) Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8959) Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8961) Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.(CVE-2026-8962) Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8968) Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11.(CVE-2026-8970) Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. 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 151 and Firefox ESR 140.11.(CVE-2026-8974) Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. 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 151, Firefox ESR 115.36, and Firefox ESR 140.11.(CVE-2026-8975) An update for firefox is now available for master/openEuler-20.03-LTS-SP4/openEuler-22.03-LTS-SP4/openEuler-24.03-LTS/openEuler-24.03-LTS-Next/openEuler-24.03-LTS-SP1/openEuler-24.03-LTS-SP3/openEuler-24.03-LTS-SP4. openEuler Security has rated this update as having a security impact of critical. A Common Vunlnerability Scoring System(CVSS)base score,which gives a detailed severity rating, is available for each vulnerability from the CVElink(s) in the References section. Critical firefox https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8388 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8391 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8401 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8946 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8947 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8949 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8950 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8953 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8954 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8955 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8956 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8957 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8958 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8959 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8961 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8962 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8968 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8970 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8974 https://www.openeuler.org/en/security/cve/detail/?cveId=CVE-2026-8975 https://nvd.nist.gov/vuln/detail/CVE-2026-8388 https://nvd.nist.gov/vuln/detail/CVE-2026-8391 https://nvd.nist.gov/vuln/detail/CVE-2026-8401 https://nvd.nist.gov/vuln/detail/CVE-2026-8946 https://nvd.nist.gov/vuln/detail/CVE-2026-8947 https://nvd.nist.gov/vuln/detail/CVE-2026-8949 https://nvd.nist.gov/vuln/detail/CVE-2026-8950 https://nvd.nist.gov/vuln/detail/CVE-2026-8953 https://nvd.nist.gov/vuln/detail/CVE-2026-8954 https://nvd.nist.gov/vuln/detail/CVE-2026-8955 https://nvd.nist.gov/vuln/detail/CVE-2026-8956 https://nvd.nist.gov/vuln/detail/CVE-2026-8957 https://nvd.nist.gov/vuln/detail/CVE-2026-8958 https://nvd.nist.gov/vuln/detail/CVE-2026-8959 https://nvd.nist.gov/vuln/detail/CVE-2026-8961 https://nvd.nist.gov/vuln/detail/CVE-2026-8962 https://nvd.nist.gov/vuln/detail/CVE-2026-8968 https://nvd.nist.gov/vuln/detail/CVE-2026-8970 https://nvd.nist.gov/vuln/detail/CVE-2026-8974 https://nvd.nist.gov/vuln/detail/CVE-2026-8975 openEuler-24.03-LTS firefox-140.11.0-1.oe2403.aarch64.rpm firefox-debuginfo-140.11.0-1.oe2403.aarch64.rpm firefox-debugsource-140.11.0-1.oe2403.aarch64.rpm firefox-140.11.0-1.oe2403.src.rpm firefox-140.11.0-1.oe2403.x86_64.rpm firefox-debuginfo-140.11.0-1.oe2403.x86_64.rpm firefox-debugsource-140.11.0-1.oe2403.x86_64.rpm A critical vulnerability has been discovered in Mozilla Firefox browser versions up to 150.0.2, classified as CWE-119 buffer error. The vulnerability allows the product to read from or write to memory locations outside the intended boundary of the buffer when performing operations on a memory buffer. This vulnerability affects confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability. 2026-05-22 CVE-2026-8388 openEuler-24.03-LTS Medium 6.5 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 A vulnerability was found in Mozilla Firefox up to 150.0.2 (Web Browser). It has been declared as critical. As an impact it is known to affect confidentiality, integrity, and availability. Upgrading to version 150.0.3 eliminates this vulnerability. 2026-05-22 CVE-2026-8391 openEuler-24.03-LTS Medium 5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 A sandbox escape vulnerability exists in the Profile Backup component of Mozilla Firefox. This vulnerability affects Firefox versions up to 150.0.2 and was fixed in version 150.0.3. An attacker could potentially exploit this vulnerability to bypass sandbox protections, impacting the confidentiality, integrity, and availability of the system. 2026-05-22 CVE-2026-8401 openEuler-24.03-LTS Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. 2026-05-22 CVE-2026-8946 openEuler-24.03-LTS High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Use-after-free in the DOM: Bindings (WebIDL) component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. 2026-05-22 CVE-2026-8947 openEuler-24.03-LTS High 7.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Integer overflow in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8949 openEuler-24.03-LTS High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Same-origin policy bypass in the Networking: HTTP component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8950 openEuler-24.03-LTS Critical 9.3 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Sandbox escape due to use-after-free in the Disability Access APIs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, and Firefox ESR 140.11. 2026-05-22 CVE-2026-8953 openEuler-24.03-LTS Critical 9.6 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Incorrect boundary conditions, integer overflow in the Audio/Video component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8954 openEuler-24.03-LTS High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8955 openEuler-24.03-LTS Medium 6.5 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Integer overflow in the Networking: JAR component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8956 openEuler-24.03-LTS Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Privilege escalation in the Enterprise Policies component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8957 openEuler-24.03-LTS Medium 6.5 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8958 openEuler-24.03-LTS High 8.6 AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Sandbox escape due to incorrect boundary conditions in the Widget: Win32 component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8959 openEuler-24.03-LTS Critical 9.6 AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Spoofing issue in the Form Autofill component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. 2026-05-22 CVE-2026-8961 openEuler-24.03-LTS Medium 6.5 AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11. 2026-05-22 CVE-2026-8962 openEuler-24.03-LTS Medium 5.4 AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8968 openEuler-24.03-LTS High 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Privilege escalation in the Security component. This vulnerability was fixed in Firefox 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8970 openEuler-24.03-LTS High 7.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. 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 151 and Firefox ESR 140.11. 2026-05-22 CVE-2026-8974 openEuler-24.03-LTS Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394 Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150. 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 151, Firefox ESR 115.36, and Firefox ESR 140.11. 2026-05-22 CVE-2026-8975 openEuler-24.03-LTS Critical 9.8 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H firefox security update 2026-05-22 https://www.openeuler.org/zh/security/security-bulletins/detail/?id=openEuler-SA-2026-2394