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

  - In the Linux kernel, the following vulnerability has been resolved: netfs: Fix NULL pointer dereference in     netfs_unbuffered_write() on retry When a write subrequest is marked NETFS_SREQ_NEED_RETRY, the retry path     in netfs_unbuffered_write() unconditionally calls stream->prepare_write() without checking if it is NULL.
    Filesystems such as 9P do not set the prepare_write operation, so stream->prepare_write remains NULL. When     get_user_pages() fails with -EFAULT and the subrequest is flagged for retry, this results in a NULL     pointer dereference at fs/netfs/direct_write.c:189. Fix this by mirroring the pattern already used in     write_retry.c: if stream->prepare_write is NULL, skip renegotiation and directly reissue the subrequest     via netfs_reissue_write(), which handles iterator reset, IN_PROGRESS flag, stats update and reissue     internally. (CVE-2026-31437)

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

Detections

Analytics

Linux Distros Unpatched Vulnerability : CVE-2026-31437

medium Nessus Plugin ID 309727

Version 1.5

Version 1.4

Version 1.3

Version 1.2

Version 1.1

Version 1.5 May 20, 2026, 10:33 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202605202233
Version 1.4 May 20, 2026, 3:58 PM CVSS metrics ("CVSSv2 score" set to 4.6) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:S/C:N/I:N/A:C") Plugin Feed: 202605201558
Version 1.3 Apr 29, 2026, 12:50 PM Detection (updated detection logic) Plugin metadata Plugin Feed: 202604291250
Version 1.2 Apr 28, 2026, 8:33 AM CVSS metrics ("CVSSv2 score" set to 4.9) CVSS metrics ("CVSSv2 vector" set to "CVSS2#AV:L/AC:L/Au:N/C:N/I:N/A:C") CVSS metrics ("CVSSv3 score" set to 5.5) CVSS metrics ("CVSSv3 vector" set to "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H") CVSSv2 severity (based on CVE-2026-31437, severity decreased from "High" to "Medium") Detection (updated detection logic) Plugin metadata Plugin Feed: 202604280833
Version 1.1 Apr 23, 2026, 4:31 AM New Plugin Feed: 202604230431