The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - ocfs2: handle invalid dinode in ocfs2_group_extend [BUG] kernel BUG at fs/ocfs2/resize.c:308! Oops:
    invalid opcode: 0000 [#1] SMP KASAN NOPTI RIP: 0010:ocfs2_group_extend+0x10aa/0x1ae0 fs/ocfs2/resize.c:308     Code: 8b8520ff ffff83f8 860f8580 030000e8 5cc3c1fe Call Trace: ... ocfs2_ioctl+0x175/0x6e0     fs/ocfs2/ioctl.c:869 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline]
    __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x197/0x1e0 fs/ioctl.c:583     x64_sys_call+0x1144/0x26a0 arch/x86/include/generated/asm/syscalls_64.h:17 do_syscall_x64     arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x93/0xf80 arch/x86/entry/syscall_64.c:94     entry_SYSCALL_64_after_hwframe+0x76/0x7e ... [CAUSE] ocfs2_group_extend() assumes that the global bitmap     inode block returned from ocfs2_inode_lock() has already been validated and BUG_ONs when the signature is     not a dinode. That assumption is too strong for crafted filesystems because the JBD2-managed buffer path     can bypass structural validation and return an invalid dinode to the resize ioctl. [FIX] Validate the     dinode explicitly in ocfs2_group_extend(). If the global bitmap buffer does not contain a valid dinode,     report filesystem corruption with ocfs2_error() and fail the resize operation instead of crashing the     kernel. (CVE-2026-31596)

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Linux Distros Unpatched Vulnerability : CVE-2026-31596

medium Nessus Plugin ID 310306

Version 1.6