Local privilege escalation in the Linux kernel's POSIX CPU timers subsystem stems from a time-of-check/time-of-use race between handle_posix_cpu_timers() and posix_cpu_timer_del() when an exiting non-autoreaping task is reaped by its parent or debugger mid-teardown. This condition is confirmed actively exploited (CISA KEV) with publicly available exploit code, and while the CVSS 3.1 base score is 7.8 (local, low-complexity, low-privilege), EPSS estimates a modest 1.34% probability (69th percentile). An attacker with local code execution can trigger the race to corrupt timer state and escalate privileges on kernels built without CONFIG_POSIX_CPU_TIMERS_TASK_WORK=y.
Memory corruption in Mozilla Firefox 140 and Thunderbird 140 (including ESR versions) allows remote code execution when users interact with malicious web content. Affected versions include Firefox ESR 140.0, Firefox 140, Thunderbird ESR 140.0, and Thunderbird 140. With CVSS 8.8 and requiring only user interaction (no authentication), this represents a significant threat to enterprise and consumer users. No public exploit identified at time of analysis, though Mozilla confirmed memory corruption evidence suggesting exploitability with sufficient attacker effort. Vendor-released patches available in Firefox 141, Firefox ESR 140.1, Thunderbird 141, and Thunderbird 140.1.
Remote code execution in Mozilla Firefox (ESR 128.12, 140.0, Firefox 140) and Thunderbird (ESR 128.12, 140.0, Thunderbird 140) allows unauthenticated remote attackers to execute arbitrary code via memory corruption vulnerabilities classified as buffer overflow (CWE-119). User interaction is required. Mozilla has released patches for all affected products (Firefox 141, ESR 128.13, ESR 140.1, Thunderbird 141, 128.13, 140.1). No public exploit identified at time of analysis, though CVSS score of 8.8 reflects high severity with complete compromise potential.
Remote code execution in Mozilla Firefox (ESR 115.x through 115.25, 128.x through 128.12, 140.0, regular 140) and Thunderbird (ESR 128.12, 140.0, regular 140) via memory safety bugs (CWE-119 buffer overflow). Attackers can execute arbitrary code by delivering crafted web content that triggers memory corruption when a user interacts with malicious pages or emails. CVSS 8.8 (High) reflects network-based attack requiring user interaction but no authentication. Vendor-released patches available: Firefox 141, Firefox ESR 115.26/128.13/140.1, Thunderbird 141/128.13/140.1. EPSS data not provided; no public exploit identified at time of analysis, though Mozilla notes evidence of memory corruption suggesting exploitability with effort.
Search term leakage in Mozilla Firefox and Thunderbird URL bars exposes sensitive user queries to unauthorized parties when URLs are shared or logged. Firefox versions prior to 141 (regular) and 140.1 (ESR), and Thunderbird versions prior to 141 (regular) and 140.1 (ESR) fail to properly clear search parameters from the URL bar after navigation, enabling information disclosure through shoulder surfing, screenshot sharing, browser history exports, or URL-based tracking. No public exploit identified at time of analysis, though the attack requires only user interaction (EPSS data not provided). CVSS 8.1 reflects high confidentiality and integrity impact despite requiring user interaction.
DNS rebinding attacks can bypass Cross-Origin Resource Sharing (CORS) protections in Mozilla Firefox and Thunderbird due to improper cache invalidation of CORS preflight responses when target IP addresses change. Remote attackers can exploit this via malicious websites to access confidential cross-origin data without user authentication (CVSS: PR:N, UI:R). No public exploit identified at time of analysis, though CERT VU#652514 provides technical disclosure. EPSS data not provided, but the combination of network-accessible attack vector, low complexity, and no required privileges warrants attention for organizations using affected Mozilla products.
Content Security Policy bypass in Mozilla Firefox and Thunderbird allows remote attackers to circumvent CSP protections via maliciously crafted XSLT documents. The flaw affects Firefox versions prior to 141 and Firefox ESR prior to 128.13/140.1, as well as Thunderbird versions prior to 141 and Thunderbird ESR prior to 128.13/140.1. Attack requires user interaction (visiting a malicious site or opening a malicious email) but no authentication. With CVSS 8.1 (High severity) and documented in six separate Mozilla security advisories, this CSP bypass enables high-impact confidentiality and integrity violations, though no public exploit or active exploitation has been identified at time of analysis.
Firefox and Thunderbird's 'Copy as cURL' feature improperly escapes shell metacharacters, allowing remote attackers to trick users into executing arbitrary commands when pasting copied network requests into a terminal. Affects Firefox <141, Firefox ESR <128.13/140.1, and Thunderbird <141, <128.13/140.1. Vendor-released patches available across all affected branches. CVSS 8.1 with network attack vector requiring user interaction; no public exploit identified at time of analysis. EPSS data not provided but social engineering dependency limits automated exploitation risk.
Mozilla Firefox and Thunderbird execute JavaScript via crafted object/embed tags, enabling remote attackers to achieve high-impact XSS without authentication. Affects Firefox <141, Firefox ESR <128.13/<140.1, and Thunderbird <141/128.13/140.1. Users must visit a malicious page (UI:R), but attack complexity is low (AC:L) and no privileges required (PR:N). Vendor-released patches available across all affected product lines. No public exploit identified at time of analysis, though the attack surface is broad given browser/email client ubiquity.