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ocfs2

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OCFS2 (Oracle Cluster File System version 2) is a clustered filesystem for Linux that allows multiple nodes to share block storage. Recent discussions on WindowsForum.com focus on several CVEs affecting OCFS2, including CVE-2024-42077, which involves a journal credit exhaustion bug in the Direct I/O path that can cause filesystem aborts and kernel panics. Other vulnerabilities like CVE-2025-40233 address stale extent map caches after defragmentation, while CVE-2025-40055 fixes a double-free memory corruption in the user cluster connect/disconnect path. Additionally, CVE-2025-22079 highlights that Azure Linux includes the vulnerable OCFS2 code, making it a remediation priority. These threads emphasize the importance of patching OCFS2 for stability and availability in clustered environments.
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    OCFS2 CVE-2024-42077 Fix Prevents Journal Credit Exhaustion and Availability Loss

    A subtle accounting error inside the OCFS2 filesystem’s Direct I/O path has been fixed as CVE-2024-42077 — a bug that could exhaust journaling transaction credits during large or heavily fragmented DIO writes and force the filesystem to abort, producing kernel panics and a complete loss of...
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    • availability risk cluster storage kernel security ocfs2
    • Replies: 0
    • Forum: Security Alerts
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    CVE-2025-22079: Azure Linux Patch Priority and Attestation Limits

    The short, practical answer is: Microsoft’s public advisory for CVE-2025-22079 names Azure Linux as the Microsoft product that has been inspected and confirmed to include the vulnerable OCFS2 code, but that attestation is a product‑scoped inventory statement — it is not proof that other...
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    • azure linux cve 2025 22079 kernel security ocfs2
    • Replies: 0
    • Forum: Security Alerts
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    OCFS2 Kernel Bug Relaxation to ocfs2_error with Cache Invalidation

    A newly reported OCFS2 filesystem vulnerability described as "relax BUG to ocfs2_error in __ocfs2_move_extent" highlights a recurring class of Linux kernel filesystem defects where aggressive kernel assertions escalate recoverable metadata inconsistencies into host‑crashing kernel BUGs...
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    • availabilityimpact filesystem vulnerability kernel patch ocfs2
    • Replies: 0
    • Forum: Security Alerts
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    OCFS2 Cache Invalidation Bug CVE-2025-40233: Fix After Extent Moves

    A subtle caching bug in the OCFS2 kernel code — tracked as CVE-2025-40233 — can leave the filesystem’s extent map cache stale after extent moves or defragmentation, allowing later I/O to observe outdated extent flags and triggering a kernel BUG; maintainers fixed the issue by explicitly clearing...
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    CVE-2025-40055: OCFS2 Double Free Fix and Rapid Kernel Backports

    A small change in the OCFS2 kernel code — setting a freed pointer to NULL — resolved a formally assigned CVE but highlights a perennial class of Linux kernel risks: double‑free memory corruption that can destabilize hosts, complicate multi‑tenant environments, and, in some cases, provide a local...
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    • kernel security memory issues ocfs2 stable backport
    • Replies: 0
    • Forum: Security Alerts
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