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timing side channel

About this tag
Timing side channels are a class of cryptographic vulnerability where an attacker can infer secret information by measuring the time a system takes to respond. On WindowsForum.com, discussions cover CVEs such as CVE-2026-47783 in Memcached affecting Azure Linux, CVE-2025-13912 and CVE-2025-11932 in wolfSSL, and CVE-2025-12888 for Xtensa ESP32 X25519. These threads highlight how non-constant-time code, often introduced by compiler optimizations, can leak sensitive data. For IT professionals managing hybrid Microsoft estates, understanding timing side channels is crucial for securing cloud base images, embedded systems, and cryptographic libraries. The tag covers patching strategies, constant-time programming, and the operational risks of overlooked dependencies.
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    CVE-2026-47783 Memcached Timing Flaw: Patch Azure Linux Before It Leaks Users

    Microsoft published CVE-2026-47783 on May 21, 2026, for a memcached timing side-channel flaw fixed upstream in version 1.6.42 and reflected in Microsoft’s Azure Linux 3.0 package update from azl3 memcached 1.6.27-4 to 1.6.27-5. The bug is not a Windows desktop crisis, and that is precisely why...
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    • azure linux cve-2026-47783 memcached timing side channel
    • Replies: 0
    • Forum: Security Alerts
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    CVE-2025-13912: WolfSSL Timing Side Channel Fixed in 5.8.4

    CVE-2025-13912 is a timing‑side‑channel concern in wolfSSL where compiler optimizations (notably from Clang/LLVM toolchains) can transform carefully written constant‑time C code into binaries whose runtime varies with secret data — a behavior that undermines cryptographic assumptions and was...
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    • constant time embedded security timing side channel wolfssl
    • Replies: 0
    • Forum: Security Alerts
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    CVE-2025-11932: WolfSSL TLS 1.3 PSK Binder Timing Fix in 5.8.4

    The TLS 1.3 pre-shared key (PSK) binder verification in wolfSSL contained a timing side‑channel: a non‑constant‑time comparison allowed tiny timing differences during binder verification that could, in theory, leak information about a PSK binder. The issue was assigned CVE‑2025‑11932, publicly...
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    • cve 2025 11932 timing side channel tls 1.3 psk binder wolfssl 5 8 4
    • Replies: 0
    • Forum: Security Alerts
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    CVE-2025-12888 Timing Fix for Xtensa ESP32 X25519 in WolfSSL

    A subtle timing weakness in X25519 implementations that affects Xtensa-based ESP32 chips has been logged as CVE-2025-12888, and wolfSSL—one of the mainstream embedded crypto libraries—has already shipped a targeted mitigation that changes build defaults for Xtensa targets to safer, low‑memory...
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    • constant time embedded cryptography timing side channel xtensa esp32
    • Replies: 0
    • Forum: Security Alerts
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