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

  - ext4: check dir entry fits before reading the hash trailer in ext4_search_dir() For casefolded encrypted     directories ext4 stores an 8-byte hash trailer after the name (EXT4_DIRENT_HASHES()), at an offset derived     from de->name_len. On the sb_no_casefold_compat_fallback() path ext4_match() reads that trailer, but     ext4_search_dir()'s by-hand pre-check only tests de->name + de->name_len <= dlimit, which proves the name     fits, not the rounded trailer. A crafted entry whose name ends at the block boundary passes the check     while EXT4_DIRENT_HASHES(de) lands past the block end, so ext4_match() reads out of bounds on an ordinary     lookup. KASAN reports it as a use-after-free when the page after the directory block holds a freed object:
    BUG: KASAN: use-after-free in ext4_match (fs/ext4/namei.c:1435) Read of size 4 at addr ffff888010458000 by     task exploit Call Trace: ext4_match (fs/ext4/namei.c:1435) ext4_search_dir (fs/ext4/namei.c:1470)
    __ext4_find_entry (fs/ext4/namei.c:1268 fs/ext4/namei.c:1632) ext4_lookup (fs/ext4/namei.c:1703     fs/ext4/namei.c:1769) ... filename_lookup (fs/namei.c:2842) vfs_statx (fs/stat.c:353) __do_sys_newfstatat     (fs/stat.c:538) do_syscall_64 (arch/x86/entry/syscall_64.c:94) entry_SYSCALL_64_after_hwframe     (arch/x86/entry/entry_64.S:121) Require, for hash-in-dirent directories, that the whole entry including     the rounded trailer fits before calling ext4_match(). This is the same bound ext4_check_dir_entry()     already enforces via ext4_dir_rec_len(), so no well-formed entry is rejected. The other caller,     ext4_find_dest_de(), runs ext4_check_dir_entry() first and is unaffected. (CVE-2026-89787)

Note that Nessus relies on the presence of the package as reported by the vendor.

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Linux Distros Unpatched Vulnerability : CVE-2026-89787

high Nessus Plugin ID 349316

Version 1.5

Version 1.4

Version 1.3

Version 1.5 Oct 18, 2026, 5:28 AM CVSS metrics ("CVSSv2 score" set to 5.6) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:P/I:N/A:C") Detection (updated detection logic) Plugin metadata Plugin Feed: 202610180528
Version 1.4 Oct 13, 2026, 2:52 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202610130252
Version 1.3 Sep 30, 2026, 6:31 AM Detection (updated detection logic) Plugin metadata Plugin Feed: 202609300631