In the Linux kernel, the following vulnerability has been resolved: s390/zcrypt: Fix buffer over-read in cca_cipher2protkey Add validation of both the actual key buffer size and token length fields in all the cca_check_sec*token() functions. Additionally check in cca_gencipherkey() for possible underflow with returned key size. The CCA token structures contain user-controlled len fields that were used in operations without proper validation against both the actual buffer size and minimum token structure size. An attacker could set this field larger than the actual buffer size, leading to reading beyond buffer boundaries. This may result in a kernel crash or exposure of memory via sending this as part of a request down to the crypto card. Also an attacker could have used a very small len value and thus enforce a buffer under-run which may produce similar effects as a over-read. So now a key must - key buf length must be at least sizeof the token struct - the key len field inside the token must fit into the range of sizeof key token struct ... key buf length

The remote Ubuntu 24.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-8886-1 advisory.

    Several security issues were discovered in the Linux kernel. An attacker could possibly use these to     compromise the system. This update corrects flaws in the following subsystems:

    - NVDIMM (Non-Volatile Memory Device) drivers;

    - Handshake API;

    - ARM32 architecture;

    - ARM64 architecture;

    - MIPS architecture;

    - OpenRISC architecture;

    - PowerPC architecture;

    - S390 architecture;

    - x86 architecture;

    - Block layer subsystem;

    - Cryptographic API;

    - Intel NPU Driver;

    - Android drivers;

    - Rados block device (RBD) driver;

    - Bluetooth drivers;

    - Hardware random number generator core;

    - TPM device driver;

    - CPU frequency scaling framework;

    - Hardware crypto device drivers;

    - DMA engine subsystem;

    - FireWire subsystem;

    - Arm Firmware Framework for ARMv8-A(FFA);

    - GPIO subsystem;

    - GPU drivers;

    - HID subsystem;

    - Hardware monitoring drivers;

    - CoreSight HW tracing drivers;

    - I2C subsystem;

    - IIO ADC drivers;

    - IIO subsystem;

    - InfiniBand drivers;

    - Input Device core drivers;

    - Input Device (Mouse) drivers;

    - IOMMU subsystem;

    - Multiple devices driver;

    - Media drivers;

    - Multifunction device drivers;

    - Fastrpc Driver;

    - Amazon Nitro Secure Module driver;

    - MMC subsystem;

    - MTD block device drivers;

    - Ethernet bonding driver;

    - Network drivers;

    - Mellanox network drivers;

    - Texas Instruments network drivers;

    - NTB driver;

    - NVME drivers;

    - NVMEM (Non Volatile Memory) drivers;

    - Parport drivers;

    - Pin controllers subsystem;

    - x86 platform drivers;

    - i.MX PM domains;

    - System reset/shutdown drivers;

    - PTP clock framework;

    - Voltage and Current Regulator drivers;

    - S/390 drivers;

    - SCSI subsystem;

    - SPI subsystem;

    - Realtek RTL8723BS SDIO drivers;

    - VME bus staging drivers;

    - Thermal drivers;

    - Thunderbolt and USB4 drivers;

    - TTY drivers;

    - DesignWare USB2 driver;

    - USB Gadget drivers;

    - USB Host Controller drivers;

    - USB Dual Role (OTG-ready) Controller drivers;

    - USB Serial drivers;

    - USB Type-C Port Controller Manager driver;

    - vDPA drivers;

    - Virtio Host (VHOST) subsystem;

    - Framebuffer layer;

    - Watchdog drivers;

    - 9P distributed file system;

    - AFS file system;

    - File systems infrastructure;

    - BTRFS file system;

    - Ceph distributed file system;

    - EROFS file system;

    - exFAT file system;

    - F2FS file system;

    - FUSE (File system in Userspace);

    - Journaling layer for block devices (JBD2);

    - Network file system (NFS) client;

    - Network file system (NFS) server daemon;

    - NTFS3 file system;

    - OCFS2 file system;

    - Proc file system;

    - SMB network file system;

    - Tracing file system;

    - UDF file system;

    - XFS file system;

    - Key management;

    - BPF subsystem;

    - Control group (cgroup);

    - Glob pattern matching library;

    - MAC80211 subsystem;

    - Mellanox drivers;

    - Networking core;

    - Network sockets;

    - IPv6 networking;

    - Bluetooth subsystem;

    - Wireless networking;

    - IPv4 networking;

    - Netfilter;

    - Network traffic control;

    - SCTP protocol;

    - TCP network protocol;

    - XFRM subsystem;

    - RDMA verbs API;

    - io_uring subsystem;

    - IPC subsystem;

    - Audit subsystem;

    - Kernel CPU control infrastructure;

    - Perf events;

    - Kernel exit() syscall;

    - Kernel fork() syscall;

    - Scheduler infrastructure;

    - Signal handling mechanism;

    - Timer subsystem;

    - Tracing infrastructure;

    - Resizable hashtable library;

    - Memory management;

    - 6LoWPAN network protocol;

    - Asynchronous Transfer Mode (ATM) subsystem;

    - B.A.T.M.A.N. meshing protocol;

    - Ethernet bridge;

    - CAN network layer;

    - Ceph Core library;

    - Ethtool driver;

    - HSR network protocol;

    - IEEE802154.4 network protocol;

    - IUCV driver;

    - KCM (Kernel Connection Multiplexor) sockets driver;

    - IEEE 802.15.4 subsystem;

    - Multipath TCP;

    - Open vSwitch;

    - Packet sockets;

    - Phonet protocol;

    - Qualcomm IPC Router (QRTR);

    - RDS protocol;

    - RxRPC session sockets;

    - SMC sockets;

    - Sun RPC protocol;

    - TIPC protocol;

    - TLS protocol;

    - Unix domain sockets;

    - VMware vSockets driver;

    - X.25 network layer;

    - eXpress Data Path;

    - AppArmor security module;

    - Integrity Measurement Architecture(IMA) framework;

    - SELinux security module;

    - ALSA framework;

    - HD-audio driver;

    - QCOM ASoC drivers;

    - Simple audio multiplexer codec driver;

    - Texas InstrumentS Audio (ASoC/HDA) drivers;

    - SoC Audio for Freescale CPUs drivers;

    - Amlogic Meson SoC drivers;

    - SOF drivers;

    - NVIDIA Tegra ASoC drivers;

    - USB sound devices;

    - Perf tools;

    - KVM subsystem; (CVE-2025-37807, CVE-2026-23265, CVE-2026-43022, CVE-2026-46321, CVE-2026-46322,     CVE-2026-52917, CVE-2026-52923, CVE-2026-52927, CVE-2026-52929, CVE-2026-52935, CVE-2026-52942,     CVE-2026-52943, CVE-2026-52947, CVE-2026-52994, CVE-2026-53136, CVE-2026-53137, CVE-2026-53138,     CVE-2026-53143, CVE-2026-53146, CVE-2026-53147, CVE-2026-53149, CVE-2026-53156, CVE-2026-53157,     CVE-2026-53160, CVE-2026-53161, CVE-2026-53184, CVE-2026-53189, CVE-2026-53194, CVE-2026-53195,     CVE-2026-53199, CVE-2026-53202, CVE-2026-53205, CVE-2026-53209, CVE-2026-53223, CVE-2026-53229,     CVE-2026-53253, CVE-2026-53255, CVE-2026-53267, CVE-2026-53268, CVE-2026-53272, CVE-2026-53329,     CVE-2026-53330, CVE-2026-53356, CVE-2026-53362, CVE-2026-53365, CVE-2026-53366, CVE-2026-53381,     CVE-2026-53383, CVE-2026-53387, CVE-2026-53388, CVE-2026-53389, CVE-2026-53390, CVE-2026-53391,     CVE-2026-53392, CVE-2026-53397, CVE-2026-53400, CVE-2026-53401, CVE-2026-53402, CVE-2026-63794,     CVE-2026-63802, CVE-2026-63803, CVE-2026-63805, CVE-2026-63806, CVE-2026-63809, CVE-2026-63812,     CVE-2026-63814, CVE-2026-63816, CVE-2026-63817, CVE-2026-63819, CVE-2026-63823, CVE-2026-63824,     CVE-2026-63827, CVE-2026-63833, CVE-2026-63867, CVE-2026-63869, CVE-2026-63870, CVE-2026-63875,     CVE-2026-63879, CVE-2026-63881, CVE-2026-63884, CVE-2026-63889, CVE-2026-63909, CVE-2026-63913,     CVE-2026-63920, CVE-2026-63925, CVE-2026-63927, CVE-2026-63930, CVE-2026-63942, CVE-2026-63954,     CVE-2026-63968, CVE-2026-63970, CVE-2026-63971, CVE-2026-63985, CVE-2026-64002, CVE-2026-64003,     CVE-2026-64004, CVE-2026-64005, CVE-2026-64009, CVE-2026-64017, CVE-2026-64023, CVE-2026-64026,     CVE-2026-64036, CVE-2026-64095, CVE-2026-64123, CVE-2026-64188, CVE-2026-64189, CVE-2026-64210,     CVE-2026-64222, CVE-2026-64239, CVE-2026-64242, CVE-2026-64243, CVE-2026-64245, CVE-2026-64246,     CVE-2026-64266, CVE-2026-64270, CVE-2026-64271, CVE-2026-64272, CVE-2026-64273, CVE-2026-64274,     CVE-2026-64276, CVE-2026-64277, CVE-2026-64279, CVE-2026-64283, CVE-2026-64286, CVE-2026-64287,     CVE-2026-64296, CVE-2026-64298, CVE-2026-64299, CVE-2026-64304, CVE-2026-64312, CVE-2026-64317,     CVE-2026-64318, CVE-2026-64322, CVE-2026-64323, CVE-2026-64324, CVE-2026-64333, CVE-2026-64368,     CVE-2026-64372, CVE-2026-64374, CVE-2026-64375, CVE-2026-64378, CVE-2026-64379, CVE-2026-64380,     CVE-2026-64388, CVE-2026-64389, CVE-2026-64395, CVE-2026-64398, CVE-2026-64401, CVE-2026-64402,     CVE-2026-64403, CVE-2026-64411, CVE-2026-64412, CVE-2026-64413, CVE-2026-64418, CVE-2026-64420,     CVE-2026-64422, CVE-2026-64423, CVE-2026-64430, CVE-2026-64432, CVE-2026-64435, CVE-2026-64436,     CVE-2026-64440, CVE-2026-64442, CVE-2026-64443, CVE-2026-64444, CVE-2026-64448, CVE-2026-64449,     CVE-2026-64452, CVE-2026-64456, CVE-2026-64463, CVE-2026-64468, CVE-2026-64469, CVE-2026-64481,     CVE-2026-64496, CVE-2026-64524, CVE-2026-64532, CVE-2026-64533, CVE-2026-64536, CVE-2026-64539,     CVE-2026-64540, CVE-2026-64543, CVE-2026-64545, CVE-2026-64546, CVE-2026-64547, CVE-2026-64550,     CVE-2026-64556, CVE-2026-64560, CVE-2026-64563, CVE-2026-64567, CVE-2026-64568, CVE-2026-64570,     CVE-2026-64574, CVE-2026-64576, CVE-2026-64577, CVE-2026-64578, CVE-2026-64580, CVE-2026-64581,     CVE-2026-64582, CVE-2026-64583, CVE-2026-64584, CVE-2026-64585, CVE-2026-64599, CVE-2026-64600,     CVE-2026-68091, CVE-2026-68096, CVE-2026-68097, CVE-2026-68098, CVE-2026-68100, CVE-2026-68104,     CVE-2026-68106, CVE-2026-68107, CVE-2026-68108, CVE-2026-68116, CVE-2026-68118, CVE-2026-68119,     CVE-2026-68121, CVE-2026-68125, CVE-2026-68129, CVE-2026-68131, CVE-2026-68140, CVE-2026-68141,     CVE-2026-68142, CVE-2026-68143, CVE-2026-68145, CVE-2026-68148, CVE-2026-68149, CVE-2026-68153,     CVE-2026-68155, CVE-2026-68157, CVE-2026-68178, CVE-2026-68179, CVE-2026-68189, CVE-2026-68192,     CVE-2026-68196, CVE-2026-68199, CVE-2026-68202, CVE-2026-68204, CVE-2026-68216, CVE-2026-68219,     CVE-2026-68222, CVE-2026-68236, CVE-2026-68245, CVE-2026-68253, CVE-2026-68255, CVE-2026-68258,     CVE-2026-68260, CVE-2026-68262, CVE-2026-68263, CVE-2026-68266, CVE-2026-68273, CVE-2026-68284,     CVE-2026-68287, CVE-2026-68290, CVE-2026-68293, CVE-2026-68294, CVE-2026-68297, CVE-2026-68299,     CVE-2026-68314, CVE-2026-68315, CVE-2026-68320, CVE-2026-68322, CVE-2026-68323, CVE-2026-68326,     CVE-2026-68329, CVE-2026-68335, CVE-2026-68338, CVE-2026-68340, CVE-2026-68348, CVE-2026-68352,     CVE-2026-68353, CVE-2026-68354, CVE-2026-68370, CVE-2026-68371, CVE-2026-68373, CVE-2026-68376,     CVE-2026-68377, CVE-2026-68383, CVE-2026-68389, CVE-2026-68391, CVE-2026-68392, CVE-2026-68397,     CVE-2026-68398, CVE-2026-68399, CVE-2026-68400, CVE-2026-68401, CVE-2026-68402, CVE-2026-68404,     CVE-2026-68408, CVE-2026-68409, CVE-2026-68414, CVE-2026-68417, CVE-2026-68419, CVE-2026-68425,     CVE-2026-68432, CVE-2026-68433, CVE-2026-68442, CVE-2026-68445, CVE-2026-68446, CVE-2026-68447,     CVE-2026-68451, CVE-2026-68452, CVE-2026-68453, CVE-2026-68454, CVE-2026-68466, CVE-2026-68467,     CVE-2026-68471, CVE-2026-68474, CVE-2026-68479, CVE-2026-72005, CVE-2026-72009, CVE-2026-72012,     CVE-2026-72019, CVE-2026-72021, CVE-2026-72024, CVE-2026-72029, CVE-2026-72035, CVE-2026-72036,     CVE-2026-72045, CVE-2026-72049, CVE-2026-72051, CVE-2026-72052, CVE-2026-72053, CVE-2026-72054,     CVE-2026-72055, CVE-2026-72057, CVE-2026-72061, CVE-2026-72066, CVE-2026-72067, CVE-2026-72072,     CVE-2026-72089, CVE-2026-72099, CVE-2026-72102, CVE-2026-72105, CVE-2026-72107, CVE-2026-72108,     CVE-2026-72109, CVE-2026-72110, CVE-2026-72113, CVE-2026-72114, CVE-2026-72115, CVE-2026-72116,     CVE-2026-72117, CVE-2026-72118, CVE-2026-72119, CVE-2026-72120, CVE-2026-72121, CVE-2026-72122,     CVE-2026-72123, CVE-2026-72133, CVE-2026-72135, CVE-2026-72136, CVE-2026-72144, CVE-2026-72146,     CVE-2026-72148, CVE-2026-72149, CVE-2026-72157, CVE-2026-72160, CVE-2026-72162, CVE-2026-72164,     CVE-2026-72165, CVE-2026-72170, CVE-2026-72171, CVE-2026-72172, CVE-2026-72175, CVE-2026-72181,     CVE-2026-72195, CVE-2026-72196, CVE-2026-72197, CVE-2026-72213, CVE-2026-72225, CVE-2026-72227,     CVE-2026-72231, CVE-2026-72232, CVE-2026-72233, CVE-2026-72235, CVE-2026-72242, CVE-2026-72243,     CVE-2026-72244, CVE-2026-72247, CVE-2026-72250, CVE-2026-72252, CVE-2026-72253, CVE-2026-72254,     CVE-2026-72261, CVE-2026-72262, CVE-2026-72282, CVE-2026-72284, CVE-2026-72297, CVE-2026-72298,     CVE-2026-72301, CVE-2026-72302, CVE-2026-72304, CVE-2026-72310, CVE-2026-72312, CVE-2026-72314,     CVE-2026-72330, CVE-2026-72334, CVE-2026-72335, CVE-2026-72338, CVE-2026-72340, CVE-2026-72342,     CVE-2026-72343, CVE-2026-72347, CVE-2026-72350, CVE-2026-72352, CVE-2026-72369, CVE-2026-72371,     CVE-2026-72373, CVE-2026-72374, CVE-2026-72375, CVE-2026-72378, CVE-2026-72382, CVE-2026-72389,     CVE-2026-72390, CVE-2026-72397, CVE-2026-72400, CVE-2026-72404, CVE-2026-72405, CVE-2026-72406,     CVE-2026-72409, CVE-2026-72410, CVE-2026-72416, CVE-2026-72418, CVE-2026-72419, CVE-2026-72420,     CVE-2026-72423, CVE-2026-72425, CVE-2026-72427, CVE-2026-72435, CVE-2026-72438, CVE-2026-72440,     CVE-2026-72444, CVE-2026-72449, CVE-2026-72450, CVE-2026-72459, CVE-2026-72460, CVE-2026-72464,     CVE-2026-72469, CVE-2026-72470, CVE-2026-72476, CVE-2026-72478, CVE-2026-72480, CVE-2026-72483,     CVE-2026-72485, CVE-2026-72492, CVE-2026-72502, CVE-2026-74256, CVE-2026-74257, CVE-2026-74258,     CVE-2026-74262, CVE-2026-74270, CVE-2026-74281, CVE-2026-74282, CVE-2026-74283, CVE-2026-74288,     CVE-2026-74289, CVE-2026-74292, CVE-2026-74293, CVE-2026-74294, CVE-2026-74295, CVE-2026-74296,     CVE-2026-74297, CVE-2026-74300, CVE-2026-74312, CVE-2026-74313, CVE-2026-74314, CVE-2026-74317,     CVE-2026-74321, CVE-2026-74330, CVE-2026-74334, CVE-2026-74338, CVE-2026-74340, CVE-2026-74341,     CVE-2026-74344, CVE-2026-74347, CVE-2026-74349, CVE-2026-74356, CVE-2026-74359, CVE-2026-74363,     CVE-2026-74365, CVE-2026-74374, CVE-2026-74375, CVE-2026-74377, CVE-2026-74378, CVE-2026-74380,     CVE-2026-74385, CVE-2026-74387, CVE-2026-74388, CVE-2026-74390, CVE-2026-74397, CVE-2026-74438,     CVE-2026-74443, CVE-2026-74444, CVE-2026-74446, CVE-2026-74450, CVE-2026-74453, CVE-2026-74454,     CVE-2026-74456, CVE-2026-74461, CVE-2026-74465, CVE-2026-74467, CVE-2026-74469, CVE-2026-74470,     CVE-2026-74471, CVE-2026-74479, CVE-2026-74481, CVE-2026-74482, CVE-2026-74485, CVE-2026-74488,     CVE-2026-74490, CVE-2026-74492, CVE-2026-74496, CVE-2026-74497, CVE-2026-74507, CVE-2026-74508,     CVE-2026-74509, CVE-2026-74510, CVE-2026-74512, CVE-2026-74515, CVE-2026-74516, CVE-2026-74518,     CVE-2026-74519, CVE-2026-74522, CVE-2026-74523, CVE-2026-74527, CVE-2026-74530, CVE-2026-74531,     CVE-2026-74533, CVE-2026-74534, CVE-2026-74535, CVE-2026-74536, CVE-2026-74537, CVE-2026-74540,     CVE-2026-74544, CVE-2026-74548, CVE-2026-74549, CVE-2026-74550, CVE-2026-74551, CVE-2026-74557,     CVE-2026-74563, CVE-2026-74564, CVE-2026-74565, CVE-2026-74567, CVE-2026-74572, CVE-2026-74574,     CVE-2026-74575, CVE-2026-74578, CVE-2026-74579, CVE-2026-74580, CVE-2026-74581, CVE-2026-74582,     CVE-2026-74583, CVE-2026-74584, CVE-2026-74586, CVE-2026-74587, CVE-2026-74588, CVE-2026-74589,     CVE-2026-74590, CVE-2026-74592, CVE-2026-74594, CVE-2026-74595, CVE-2026-74597, CVE-2026-74598,     CVE-2026-74601, CVE-2026-74603, CVE-2026-74604, CVE-2026-74605, CVE-2026-74606, CVE-2026-74607,     CVE-2026-74608, CVE-2026-74609, CVE-2026-74610, CVE-2026-74611, CVE-2026-74612, CVE-2026-74613,     CVE-2026-74614, CVE-2026-74615, CVE-2026-74616, CVE-2026-74621, CVE-2026-74624, CVE-2026-74625,     CVE-2026-74626, CVE-2026-74628, CVE-2026-74630, CVE-2026-74631, CVE-2026-74632, CVE-2026-74634,     CVE-2026-74635, CVE-2026-74637, CVE-2026-74641, CVE-2026-74646, CVE-2026-74647, CVE-2026-74648,     CVE-2026-74649, CVE-2026-74651, CVE-2026-74656, CVE-2026-74660, CVE-2026-74661, CVE-2026-74662,     CVE-2026-74663, CVE-2026-74666, CVE-2026-74667, CVE-2026-74668, CVE-2026-74669, CVE-2026-74670,     CVE-2026-74675, CVE-2026-74678, CVE-2026-74684, CVE-2026-74687, CVE-2026-74688, CVE-2026-74689,     CVE-2026-74690, CVE-2026-74691, CVE-2026-74692, CVE-2026-74695, CVE-2026-74696, CVE-2026-74697,     CVE-2026-74700, CVE-2026-74701, CVE-2026-74704, CVE-2026-74705, CVE-2026-74710, CVE-2026-74711,     CVE-2026-74713, CVE-2026-74714, CVE-2026-74715, CVE-2026-74717, CVE-2026-74720, CVE-2026-74723,     CVE-2026-74724, CVE-2026-74725, CVE-2026-74726, CVE-2026-74730, CVE-2026-74733, CVE-2026-74736,     CVE-2026-74737, CVE-2026-74739, CVE-2026-74743, CVE-2026-74744, CVE-2026-74746, CVE-2026-74747,     CVE-2026-74748, CVE-2026-74752, CVE-2026-80521, CVE-2026-80526, CVE-2026-80527, CVE-2026-80528,     CVE-2026-80536, CVE-2026-80540, CVE-2026-80541, CVE-2026-80547, CVE-2026-80548, CVE-2026-80549,     CVE-2026-80550, CVE-2026-80551, CVE-2026-80552, CVE-2026-80553, CVE-2026-80554, CVE-2026-80555,     CVE-2026-80556, CVE-2026-80557, CVE-2026-80558, CVE-2026-80559, CVE-2026-80560, CVE-2026-80561,     CVE-2026-80565, CVE-2026-80568, CVE-2026-80569, CVE-2026-80570, CVE-2026-80572, CVE-2026-80574,     CVE-2026-80576, CVE-2026-80578, CVE-2026-80579, CVE-2026-80580, CVE-2026-80583, CVE-2026-80584,     CVE-2026-80585, CVE-2026-80586, CVE-2026-80587, CVE-2026-80589, CVE-2026-80721, CVE-2026-80901,     CVE-2026-97509)

Tenable has extracted the preceding description block directly from the Ubuntu 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.

  - s390/zcrypt: Fix buffer over-read in cca_cipher2protkey Add validation of both the actual key buffer size     and token length fields in all the cca_check_sec*token() functions. Additionally check in     cca_gencipherkey() for possible underflow with returned key size. The CCA token structures contain user-     controlled len fields that were used in operations without proper validation against both the actual     buffer size and minimum token structure size. An attacker could set this field larger than the actual     buffer size, leading to reading beyond buffer boundaries. This may result in a kernel crash or exposure of     memory via sending this as part of a request down to the crypto card. Also an attacker could have used a     very small len value and thus enforce a buffer under-run which may produce similar effects as a over-read.
    So now a key must - key buf length must be at least sizeof the token struct - the key len field inside the     token must fit into the range of sizeof key token struct ... key buf length (CVE-2026-68453)

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

ID	Name	Product	Family	Type	Severity
365457	Ubuntu 24.04 LTS : Linux kernel (NVIDIA Tegra) vulnerabilities (USN-8886-1)	Nessus	Ubuntu Local Security Checks	Local	high
335232	Linux Distros Unpatched Vulnerability : CVE-2026-68453	Nessus	Misc.	Local	high

Detections

Analytics

CVE-2026-68453

high

Tenable Plugins

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high