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Critical/high still unreviewed, or CISA KEV listed
Memory safety bug fixed in Thunderbird ESR 140.12. This vulnerability was fixed in Firefox ESR 140.12 and Thunderbird 140.12. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7. Will not fix / out of support: Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Memory safety bugs present in Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird ESR 140.11, Firefox 151 and Thunderbird 151. 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. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825. Affected Red Hat products: Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 10.0 Extended Update Support; Red Hat Enterprise Linux 7 Extended Lifecycle Support; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support; Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On; Red Hat Enterprise Linux 8.8 Telecommunications Update Service; Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions; Red Hat Enterprise Linux 9; Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions; Red Hat Enterprise Linux 9.6 Extended Update Support; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7.
Memory safety bugs present in Firefox 151 and Thunderbird 151. 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 152 and Thunderbird 152. Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory. Red Hat severity: Important — CVSS 7.5 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H). Weakness: CWE-825. Red Hat lists Red Hat Enterprise Linux 10; Red Hat Enterprise Linux 6; Red Hat Enterprise Linux 7; Red Hat Enterprise Linux 8; Red Hat Enterprise Linux 9 as not affected.
JIT miscompilation in the DOM: Core & HTML component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-733. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Memory safety bug fixed in Firefox ESR 140.12. Red Hat rates this important (CVSS 7.5). Weakness: CWE-843. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Sandbox escape due to incorrect boundary conditions in the Networking component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-653. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Sandbox escape in the Security: Process Sandboxing component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-403. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Sandbox escape in the DOM: Navigation component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-653. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Sandbox escape in the DOM: Workers component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-266. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Use-after-free in the Graphics: WebGPU component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
Incorrect boundary conditions in the Web Audio component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-787. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Use-after-free in the Networking: HTTP component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-825. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Memory safety bug fixed in Thunderbird ESR 140.12. Red Hat rates this important (CVSS 7.5). Weakness: CWE-823. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
Privilege escalation in the Graphics: WebRender component. Red Hat rates this important (CVSS 7.5). Weakness: CWE-266. Affected package(s): firefox, thunderbird. Resolved in Red Hat advisory RHSA-2026:29940 — update the affected packages (`sudo dnf update`).
A stack-based buffer overflow vulnerability in the CGI program of Zyxel GS1900-48HPv2 firmware versions through 2.90(ABTQ.1)C0 could allow a LAN-based, unauthenticated attacker to exploit the flaw and potentially execute OS commands via a crafted HTTP request.
Denial of Service via integer overflow in remote message decompression. Red Hat rates this important (CVSS 8.6). Weakness: CWE-190. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
integer overflow in VIOSockSelect leads to heap-based buffer overflow. Red Hat rates this important (CVSS 7.8). Weakness: CWE-190. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
local privilege escalation via forged cifs.spnego key description in cifs.upcall. Red Hat rates this important (CVSS 7.8). Weakness: CWE-250. Affected package(s): cifs-utils. Resolved in Red Hat advisory RHSA-2026:32990 — update the affected packages (`sudo dnf update`).
elixir-grpc grpc: Remote Code Execution and Denial of Service via Deserialization of Untrusted Data. Red Hat rates this critical (CVSS 9.8). Weakness: CWE-502. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.
Crypt::DSA: Crypt::DSA: Private-key recovery via nonce reuse across signatures. Red Hat rates this important (CVSS 7.1). Weakness: CWE-323. No fix erratum has been published yet; monitor the Red Hat CVE page and apply the RHSA when released.