In the Linux kernel, the following vulnerability has been resolved: thunderbolt: property: Reject u32 wrap in tb_property_entry_valid() entry->value is u32 and entry->length is u16; the sum is performed in u32 and wraps. A malicious XDomain peer can pick value = 0xffffff00, length = 0x100 so the sum 0x100000000 wraps to 0 and passes the > block_len check. tb_property_parse() then passes entry->value to parse_dwdata() as a dword offset into the property block, reading attacker-directed memory far past the allocation. For TEXT-typed entries with the "deviceid" or "vendorid" keys this lands in xd->device_name / xd->vendor_name and is readable back via the per-XDomain device_name / vendor_name sysfs attributes; the leak is NUL-bounded (kstrdup() stops at the first zero byte) and untargeted (the attacker picks a delta, not an absolute address). DATA-typed entries are parsed into property->value.data but not generically surfaced to userspace. Use check_add_overflow() so a wrapped sum is rejected.

suse_linux SUSE-SU-2026:3595-1: SUSE SLES15 : Security update for the Linux Kernel (Important) (SUSE-SU-2026:3595-1)

suse_linux SUSE-SU-2026:3594-1: SUSE SLES12 : Security update for the Linux Kernel (Important) (SUSE-SU-2026:3594-1)

suse_linux SUSE-SU-2026:3593-1: SUSE SLES15 : Security update for the Linux Kernel (Important) (SUSE-SU-2026:3593-1)

opensuse openSUSE-SU-2026:21555-1: openSUSE 16 : Security update for the Linux Kernel (Important) (openSUSE-SU-2026:21555-1)

An update of the linux package has been released.

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

  - thunderbolt: property: Reject u32 wrap in tb_property_entry_valid() entry->value is u32 and entry->length     is u16; the sum is performed in u32 and wraps. A malicious XDomain peer can pick value = 0xffffff00,     length = 0x100 so the sum 0x100000000 wraps to 0 and passes the > block_len check. tb_property_parse()     then passes entry->value to parse_dwdata() as a dword offset into the property block, reading attacker-     directed memory far past the allocation. For TEXT-typed entries with the deviceid or vendorid keys     this lands in xd->device_name / xd->vendor_name and is readable back via the per-XDomain device_name /     vendor_name sysfs attributes; the leak is NUL-bounded (kstrdup() stops at the first zero byte) and     untargeted (the attacker picks a delta, not an absolute address). DATA-typed entries are parsed into     property->value.data but not generically surfaced to userspace. Use check_add_overflow() so a wrapped sum     is rejected. (CVE-2026-63893)

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

ID	Name	Product	Family	Type	Severity
333941	Photon OS 5.0: Linux PHSA-2026-5.0-92-0926	Nessus	PhotonOS Local Security Checks	Local	high
333762	Photon OS 5.0: Linux PHSA-2026-5.0-92-0895	Nessus	PhotonOS Local Security Checks	Local	high
329326	Photon OS 5.0: Linux PHSA-2026-5.0-0926	Nessus	PhotonOS Local Security Checks	Local	high
328156	Linux Distros Unpatched Vulnerability : CVE-2026-63893	Nessus	Misc.	Local	high
322944	Photon OS 5.0: Linux PHSA-2026-5.0-0895	Nessus	PhotonOS Local Security Checks	Local	high

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