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linux kernel vulnerability

About this tag
The linux kernel vulnerability tag covers several CVEs affecting the Linux kernel, including issues in KVM AMD nested virtualization (CVE-2026-45987), Reliable Datagram Sockets (RDS) double free (CVE-2026-43494) and off-by-one (CVE-2024-23849), and Qualcomm ASoC buffer overflow (CVE-2025-37979). These vulnerabilities range from denial-of-service to local privilege escalation risks. Microsoft has confirmed Azure Linux as affected by some of these bugs, and the WSL2 kernel may also be relevant. Discussions include mitigation strategies, exposure verification, and the operational impact on virtualization, networking, and audio subsystems.
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    CVE-2026-45987: KVM AMD Nested Virtualization Interrupt-Shadow Hang After Restore

    CVE-2026-45987 is a newly published Linux kernel KVM vulnerability, disclosed by kernel.org and listed by NVD on May 27, 2026, involving AMD nested virtualization state handling that can cause an L2 virtual machine to hang after restore or migration. The bug is not a flashy remote-code-execution...
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    • amd nested virtualization kvm security linux kernel vulnerability vm migration
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    • Forum: Security Alerts
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    CVE-2026-43494 Linux RDS Double Free: PinTheft LPE Risk and Mitigations

    CVE-2026-43494 is a newly published Linux kernel vulnerability, disclosed through NVD on May 21, 2026, in the Reliable Datagram Sockets networking code, where a failed zero-copy page-pin operation can leave stale accounting state and trigger a later double free. The bug is narrow in the way only...
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    • linux kernel vulnerability local privilege escalation rds zero-copy zero-copy page pinning
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    • Forum: Security Alerts
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    Understanding CVE-2024-23849 Linux RDS kernel off-by-one DoS

    The Linux kernel flaw tracked as CVE-2024-23849 is a classic off-by-one bounds-check error in the RDS receive path that can produce an out‑of‑bounds memory access and a denial‑of‑service (system crash) on affected kernels up to and including 6.7.1. Background / Overview Reliable Datagram Sockets...
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    • cve 2024 23849 denial of service linux kernel vulnerability rds receive path
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    • Forum: Security Alerts
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    CVE-2025-38115: Azure Linux Attestation and Microsoft Kernel Risk

    The short answer is: Microsoft has publicly confirmed Azure Linux as a carrier of the upstream code path implicated by CVE‑2025‑38115, but that attestation is product‑scoped — it is not a technical guarantee that no other Microsoft product could include the same vulnerable kernel code. Treat...
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    • azure linux cve 2025 38115 linux kernel vulnerability wsl2 kernel
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    • Forum: Security Alerts
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    CVE-2025-37979 Explainer: Azure Linux Attestation and Qualcomm ASoC Buffer Overflow

    A buffer‑overflow bug in the Linux kernel’s Qualcomm ASoC (audio) support — tracked as CVE‑2025‑37979 — has prompted Microsoft to map the upstream component to its Azure Linux distribution and to advise customers that Azure Linux “includes this open‑source library and is therefore potentially...
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    • azure linux attestation cve 2025 37979 linux kernel vulnerability qualcomm asoc
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    • Forum: Security Alerts
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