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kasan

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KASAN, the Kernel Address Sanitizer, is a dynamic memory error detector built into the Linux kernel. Discussions on WindowsForum.com cover KASAN-related vulnerabilities and fixes, including CVE-2026-43292 addressing RCU stalls during vmalloc cleanup, CVE-2025-68378 fixing a BPF stackmap out-of-bounds write, CVE-2025-38029 resolving a sleep-in-atomic-context bug, and CVE-2025-37750 for an SMB multichannel use-after-free. These threads highlight KASAN's role in detecting slab overflows, use-after-frees, and other memory safety issues, often discovered via Syzkaller fuzzing. Administrators running Linux guests, WSL, Hyper-V, or Azure Linux should monitor KASAN-related patches to maintain system stability and security.
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    CVE-2026-43292: Linux Kernel RCU Stall Fix for KASAN vmalloc Cleanup

    CVE-2026-43292 is a Linux kernel availability vulnerability published by NVD on May 8, 2026, after a kernel.org fix for RCU stalls in kasan_release_vmalloc_node, where vmalloc cleanup could monopolize CPU time when CONFIG_PAGE_OWNER and KASAN shadow-page freeing collided. The bug is not a...
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    CVE-2025-68378: Linux BPF Stackmap Overflow Fixed and Mitigations

    A newly recorded Linux kernel vulnerability, tracked as CVE-2025-68378, fixes a dangerous boundary-check omission in the BPF stackmap handling that could produce a KASAN-detected slab out‑of‑bounds write when copying stack trace entries into a stackmap bucket. The flaw was reported by the...
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    • bpf stackmap cve 2025 68378 kasan linux kernel
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    • Forum: Security Alerts
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    CVE-2025-38029 Linux KASAN Sleep in Atomic Context Fixed Azure Linux Patch

    A recently assigned Linux-kernel vulnerability, CVE-2025-38029 — described as “kasan: avoid sleepable page allocation from atomic context” — has prompted an upstream kernel patch that removes a sleep-prone allocation in a KASAN-related path and has raised questions about which Microsoft...
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    Linux SMB Multichannel UAF CVE-2025-37750: Fixes and Mitigations

    A recently disclosed Linux-kernel vulnerability, tracked as CVE-2025-37750, fixes a kernel use‑after‑free (UAF) that can be triggered when SMB multichannel is used with encrypted transfers; the bug arises from reusing crypto AEAD state across channels and manifests as KASAN-detected slab UAFs...
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    • kasan linux kernel memory safety smb multichannel
    • Replies: 0
    • Forum: Security Alerts
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    Linux Kernel UDF Patch Defends Against Out-of-Bounds Reads (CVE-2025-40044)

    The Linux kernel received a targeted fix for an out‑of‑bounds read in the UDF filesystem parser — a small defensive change that closes a KASAN‑reported use‑after‑free triggered by malformed Allocation Extent Descriptors and prevents crc_itu_t from being invoked on memory outside the descriptor...
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    • disk image security kasan linux kernel udf memory safety
    • Replies: 0
    • Forum: Security Alerts
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