An update of the linux package has been released.

The remote Debian 11 host has packages installed that are affected by multiple vulnerabilities as referenced in the dla-4700 advisory.

    -------------------------------------------------------------------------     Debian LTS Advisory DLA-4700-1                debian-lts@lists.debian.org     https://www.debian.org/lts/security/                        Ben Hutchings     July 26, 2026                                 https://wiki.debian.org/LTS
    -------------------------------------------------------------------------

    Package        : linux-6.1     Version        : 6.1.177-1~deb11u1     CVE ID         : CVE-2025-23131 CVE-2026-23272 CVE-2026-23278 CVE-2026-23302                      CVE-2026-31451 CVE-2026-46252 CVE-2026-52928 CVE-2026-53138                      CVE-2026-53139 CVE-2026-53157 CVE-2026-53158 CVE-2026-53163                      CVE-2026-53167 CVE-2026-53325 CVE-2026-53327 CVE-2026-53359                      CVE-2026-53362 CVE-2026-53366 CVE-2026-53381 CVE-2026-53382                      CVE-2026-53383 CVE-2026-53384 CVE-2026-53385 CVE-2026-53388                      CVE-2026-53390 CVE-2026-53391 CVE-2026-53397 CVE-2026-53398                      CVE-2026-53403 CVE-2026-63794 CVE-2026-63795 CVE-2026-63796                      CVE-2026-63798 CVE-2026-63800 CVE-2026-63801 CVE-2026-63803                      CVE-2026-63807 CVE-2026-63808 CVE-2026-63809 CVE-2026-63814                      CVE-2026-63817 CVE-2026-63822 CVE-2026-63823 CVE-2026-63824                      CVE-2026-63827 CVE-2026-63828 CVE-2026-63830 CVE-2026-63831                      CVE-2026-63833 CVE-2026-63834 CVE-2026-63835 CVE-2026-63836                      CVE-2026-64188 CVE-2026-64191 CVE-2026-64246 CVE-2026-64249                      CVE-2026-64252 CVE-2026-64254 CVE-2026-64529     Debian Bug     : 1130365

    Several vulnerabilities have been discovered in the Linux kernel that     may lead to a privilege escalation, denial of service or information     leaks.

    For Debian 11 bullseye, these problems have been fixed in version     6.1.177-1~deb11u1.  This version additionally updates the Microsoft     Azure Network Adapter (mana) driver, and includes many more bug fixes     from stable update 6.1.177.

    We recommend that you upgrade your linux-6.1 packages.

    For the detailed security status of linux-6.1 please refer to     its security tracker page at:
    https://security-tracker.debian.org/tracker/linux-6.1

    Further information about Debian LTS security advisories, how to apply     these updates to your system and frequently asked questions can be     found at: https://wiki.debian.org/LTS     Attachment:
    signature.asc     Description: PGP signature

Tenable has extracted the preceding description block directly from the Debian security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

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

  - ksmbd: fix out-of-bounds read in smb_check_perm_dacl() The permission-check ACE walk in     smb_check_perm_dacl() validates the ACE header size and caps sid.num_subauth at SID_MAX_SUB_AUTHORITIES,     but it never checks that ace->size is actually large enough to contain num_subauth sub-authorities before     compare_sids() dereferences them. CIFS_SID_BASE_SIZE covers the SID header up to but excluding the     sub_auth[] array, and offsetof(struct smb_ace, sid) is the ACE header, so the existing guards only     guarantee the 8-byte SID base, i.e. zero sub-authorities. compare_sids() then reads ace->sid.sub_auth[i]     for i < min(local_sid->num_subauth, ace->sid.num_subauth). The local comparison SIDs (sid_everyone,     sid_unix_NFS_mode, and the id_to_sid() result) always have at least one sub-authority, and an attacker     controls the ACE revision and authority bytes (which lie within the in-bounds SID base), so they can match     one of those SIDs and force the sub_auth read. A crafted ACE with size == 16 and num_subauth >= 1 placed     at the tail of the security descriptor therefore causes a heap out-of-bounds read of up to     SID_MAX_SUB_AUTHORITIES * sizeof(__le32) bytes past the pntsd allocation. The security descriptor is     loaded by ksmbd_vfs_get_sd_xattr() into a buffer sized exactly to the on-disk data (kzalloc(sd_size) in     ndr_decode_v4_ntacl()), so the read lands past the allocation. The malformed descriptor can be stored     verbatim via SMB2_SET_INFO (the DACL is not normalised before being written to the security.NTACL xattr)     and the read fires on a subsequent SMB2_CREATE access check, making this reachable by an authenticated     client on a share that uses ACL xattrs. Add the missing num_subauth-versus-ace_size check, mirroring the     identical guards already present in the sibling parsers parse_dacl() and smb_inherit_dacl().
    (CVE-2026-53390)

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

ID	Name	Product	Family	Published	Updated	Severity
326038	Photon OS 5.0: Linux PHSA-2026-5.0-0916	Nessus	PhotonOS Local Security Checks	7/9/2026	8/1/2026	high
329326	Photon OS 5.0: Linux PHSA-2026-5.0-0926	Nessus	PhotonOS Local Security Checks	7/24/2026	7/28/2026	high
330014	Debian dla-4700 : linux-config-6.1 - security update	Nessus	Debian Local Security Checks	7/26/2026	7/26/2026	high
328185	Linux Distros Unpatched Vulnerability : CVE-2026-53390	Nessus	Misc.	7/20/2026	7/25/2026	high

Detections

Analytics

Plugins Search

high

high

high

high