USN-8569-1: Linux kernel (HWE) vulnerabilities

It was discovered that some AMD processors did not properly clear data in the floating point divider unit during speculative execution. A local attacker could use this to expose sensitive information. (CVE-2025-54505) It was discovered that some AMD Zen 2 processors did not properly isolate shared resources in the operation cache. A local attacker could possibly use this issue to corrupt instructions executed at a higher privilege level, resulting in privilege escalation. (CVE-2025-54518) It was discovered that the Linux kernel did not properly handle shared page fragments during socket buffer operations, collectively known as Dirty Frag. A logic flaw existed in the XFRM ESP-in-TCP subsystem and in the RxRPC networking subsystem when processing paged fragments. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43284, CVE-2026-43500, CVE-2026-45998, CVE-2026-46000) It was discovered that a logic flaw existed in the XFRM ESP-in-TCP subsystem in the Linux kernel when handling socket buffer fragments. This flaw is known as Fragnesia. A local attacker could use this to escalate privileges, or possibly escape a container. (CVE-2026-43503, CVE-2026-46300) Qualys discovered that a race condition existed in the ptrace subsystem of the Linux kernel when privileged processes are exiting. An unprivileged local attacker could use this issue to expose sensitive information. (CVE-2026-46333) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a memory leak when handling AppArmor notifications. A local attacker could use this to cause resource exhaustion. (CVE-2026-47326) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contain a NULL pointer dereference when handling AppArmor notifications. A local attacker could use this to cause a kernel oops. (CVE-2026-47327) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an invalid free when handling AppArmor notifications. A local attacker could use this to corrupt kernel memory. (CVE-2026-47328) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained insufficient validation of AppArmor notification responses. A local attacker could use this to allow crafted responses to be processed. (CVE-2026-47329) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 used an uninitialized variable when handling AppArmor notifications. A local attacker could use this to cause incorrect caching of data. (CVE-2026-47330) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained an out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause information disclosure of kernel memory. (CVE-2026-47332) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a out-of-bounds (OOB) read when handling AppArmor notifications. A local attacker could use this to cause kernel memory corruption and, theoretically, influence processing of AppArmor policies. (CVE-2026-47333) Tristan Madani discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained incorrect holding of locks when handling AppArmor notifications. A local attacker could use this to cause a kernel panic or deadlock. (CVE-2026-47334) Tristan Madani and Trevor Lawrence have each independently discovered that Ubuntu Linux kernel 6.8, 6.17 and 7.0 contained a NULL pointer dereference when handling AppArmor network socket mediation. A local attacker could use this to cause a kernel oops. (CVE-2026-47337) 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: - PSP security protocol; - ARM64 architecture; - PowerPC architecture; - RISC-V architecture; - S390 architecture; - User-Mode Linux (UML); - x86 architecture; - Block layer subsystem; - Cryptographic API; - Intel NPU Driver; - DRBD Distributed Replicated Block Device drivers; - Rados block device (RBD) driver; - Ublk userspace block driver; - Compressed RAM block device driver; - Bluetooth drivers; - Bus devices; - Character device driver; - TPM device driver; - Clock framework and drivers; - CPU frequency scaling framework; - Hardware crypto device drivers; - EDAC drivers; - EFI core; - FWCTL subsystem; - GPU drivers; - Greybus drivers; - HID subsystem; - Microsoft Hyper-V drivers; - Hardware monitoring drivers; - I2C subsystem; - I3C subsystem; - IIO subsystem; - InfiniBand drivers; - Input Device core drivers; - IOMMU subsystem; - LED subsystem; - Mailbox framework; - Multiple devices driver; - Media drivers; - NVIDIA Tegra memory controller driver; - IBM Advanced System Management driver; - MTD block device drivers; - Network drivers; - Ethernet bonding driver; - Mellanox network drivers; - Microsoft Azure Network Adapter (MANA) driver; - STMicroelectronics network drivers; - MediaTek network drivers; - NTB driver; - NVME drivers; - Device tree and open firmware driver; - PCI subsystem; - Pin controllers subsystem; - Chrome hardware platform drivers; - ACPI WMI driver; - x86 platform drivers; - Generic PM domains; - MediaTek PM domains; - Power supply drivers; - Remote Processor subsystem; - MPAM driver; - Amlogic Meson reset controller drivers; - S/390 drivers; - SCSI subsystem; - NVIDIA Tegra Control Backbone (CBB) driver; - SPI subsystem; - Greybus lights staging drivers; - Media staging drivers; - Realtek RTL8723BS SDIO drivers; - SM750 framebuffer staging driver; - TCM subsystem; - Thermal drivers; - TTY drivers; - USB Device Class drivers; - ULPI bus; - USB Gadget drivers; - USB Type-C support driver; - TI TPS6598x USB Power Delivery controller driver; - USB over IP driver; - vDPA drivers; - VFIO drivers; - Framebuffer layer; - TSM AMD SEV Guest driver; - Xen hypervisor drivers; - 9P distributed file system; - File systems infrastructure; - AFS file system; - BTRFS file system; - Ceph distributed file system; - EROFS file system; - Ext4 file system; - F2FS file system; - FUSE (File system in Userspace); - GFS2 file system; - HFS+ file system; - HugeTLB file system; - Journaling layer for block devices (JBD2); - Network file system (NFS) server daemon; - NILFS2 file system; - File system notification infrastructure; - NTFS3 file system; - OCFS2 file system; - Overlay file system; - Diskquota system; - SMB network file system; - Tracing file system; - UDF file system; - XFS file system; - DRM TTM subsystem; - Codetag library; - Control group (cgroup); - Kernel CPU control infrastructure; - Memory management; - QorIQ DPAA2 FSL-MC bus driver; - Freescale ENETC Ethernet drivers; - Memory Management; - KVM subsystem; - padata parallel execution mechanism; - PPP protocol drivers and compressors; - Bluetooth subsystem; - Networking core; - Netfilter; - Network traffic control; - Tracing infrastructure; - User-space API (UAPI); - io_uring subsystem; - IPC subsystem; - Audit subsystem; - BPF subsystem; - Kernel exit() syscall; - Kernel fork() syscall; - Kernel futex primitives; - Locking primitives; - Padata parallel execution mechanism; - Scheduler infrastructure; - Timer subsystem; - Cryptographic library; - Scatterlist API; - Heterogeneous memory management; - KASAN memory debugging framework; - 802.1Q VLAN protocol; - B.A.T.M.A.N. meshing protocol; - Ethernet bridge; - CAIF protocol; - CAN network layer; - Ceph Core library; - Distributed Switch Architecture; - IPv4 networking; - IPv6 networking; - MAC80211 subsystem; - Multipath TCP; - NFC subsystem; - Open vSwitch; - Packet sockets; - Phonet protocol; - Qualcomm IPC Router (QRTR); - RDS protocol; - RxRPC session sockets; - SCTP protocol; - SMC sockets; - Stream parser; - TIPC protocol; - TLS protocol; - Unix domain sockets; - VMware vSockets driver; - XFRM subsystem; - Integrity Measurement Architecture(IMA) framework; - Landlock security; - SELinux security module; - ALSA framework; - Generic PCM loopback sound driver; - FireWire sound drivers; - HD-audio driver; - Creative Sound Blaster X-Fi driver; - QCOM ASoC drivers; - SOF drivers; - STI ASoC drivers; - USB sound devices; - Objtool; (CVE-2026-31532, CVE-2026-31574, CVE-2026-31575, CVE-2026-31576, CVE-2026-31577, CVE-2026-31578, CVE-2026-31579, CVE-2026-31580, CVE-2026-31581, CVE-2026-31582, CVE-2026-31583, CVE-2026-31584, CVE-2026-31585, CVE-2026-31586, CVE-2026-31587, CVE-2026-31588, CVE-2026-31589, CVE-2026-31590, CVE-2026-31591, CVE-2026-31592, CVE-2026-31593, CVE-2026-31594, CVE-2026-31595, CVE-2026-31596, CVE-2026-31597, CVE-2026-31598, CVE-2026-31599, CVE-2026-31600, CVE-2026-31601, CVE-2026-31602, CVE-2026-31603, CVE-2026-31604, CVE-2026-31605, CVE-2026-31606, CVE-2026-31607, CVE-2026-31608, CVE-2026-31609, CVE-2026-31610, CVE-2026-31611, CVE-2026-31612, CVE-2026-31613, CVE-2026-31614, CVE-2026-31615, CVE-2026-31616, CVE-2026-31617, CVE-2026-31618, CVE-2026-31619, CVE-2026-31620, CVE-2026-31621, CVE-2026-31622, CVE-2026-31623, CVE-2026-31624, CVE-2026-31625, CVE-2026-31626, CVE-2026-31627, CVE-2026-31628, CVE-2026-31629, CVE-2026-31686, CVE-2026-31694, CVE-2026-31696, CVE-2026-31697, CVE-2026-31698, CVE-2026-31699, CVE-2026-31700, CVE-2026-31701, CVE-2026-31702, CVE-2026-31703, CVE-2026-31704, CVE-2026-31705, CVE-2026-31706, CVE-2026-31707, CVE-2026-31708, CVE-2026-31709, CVE-2026-31710, CVE-2026-31711, CVE-2026-31712, CVE-2026-31713, CVE-2026-31714, CVE-2026-31715, CVE-2026-31716, CVE-2026-31717, CVE-2026-31718, CVE-2026-31719, CVE-2026-43058, CVE-2026-43071, CVE-2026-43072, CVE-2026-43073, CVE-2026-43348, CVE-2026-43349, CVE-2026-43350, CVE-2026-43490, CVE-2026-43491, CVE-2026-43492, CVE-2026-43493, CVE-2026-43494, CVE-2026-43495, CVE-2026-43496, CVE-2026-43497, CVE-2026-43498, CVE-2026-43499, CVE-2026-43501, CVE-2026-43502, CVE-2026-45834, CVE-2026-45835, CVE-2026-45836, CVE-2026-45837, CVE-2026-45838, CVE-2026-45839, CVE-2026-45840, CVE-2026-45841, CVE-2026-45842, CVE-2026-45843, CVE-2026-45844, CVE-2026-45845, CVE-2026-45846, CVE-2026-45986, CVE-2026-45987, CVE-2026-45988, CVE-2026-45989, CVE-2026-45990, CVE-2026-45991, CVE-2026-45994, CVE-2026-45995, CVE-2026-45996, CVE-2026-45997, CVE-2026-45999, CVE-2026-46001, CVE-2026-46002, CVE-2026-46003, CVE-2026-46004, CVE-2026-46005, CVE-2026-46006, CVE-2026-46007, CVE-2026-46008, CVE-2026-46009, CVE-2026-46010, CVE-2026-46011, CVE-2026-46012, CVE-2026-46013, CVE-2026-46014, CVE-2026-46015, CVE-2026-46016, CVE-2026-46018, CVE-2026-46019, CVE-2026-46020, CVE-2026-46021, CVE-2026-46022, CVE-2026-46023, CVE-2026-46024, CVE-2026-46025, CVE-2026-46026, CVE-2026-46027, CVE-2026-46028, CVE-2026-46029, CVE-2026-46030, CVE-2026-46031, CVE-2026-46032, CVE-2026-46033, CVE-2026-46034, CVE-2026-46035, CVE-2026-46036, CVE-2026-46037, CVE-2026-46038, CVE-2026-46039, CVE-2026-46040, CVE-2026-46041, CVE-2026-46042, CVE-2026-46043, CVE-2026-46044, CVE-2026-46045, CVE-2026-46046, CVE-2026-46047, CVE-2026-46049, CVE-2026-46050, CVE-2026-46051, CVE-2026-46052, CVE-2026-46053, CVE-2026-46054, CVE-2026-46056, CVE-2026-46057, CVE-2026-46058, CVE-2026-46059, CVE-2026-46060, CVE-2026-46061, CVE-2026-46062, CVE-2026-46063, CVE-2026-46064, CVE-2026-46065, CVE-2026-46066, CVE-2026-46067, CVE-2026-46068, CVE-2026-46069, CVE-2026-46070, CVE-2026-46071, CVE-2026-46072, CVE-2026-46073, CVE-2026-46074, CVE-2026-46075, CVE-2026-46076, CVE-2026-46077, CVE-2026-46078, CVE-2026-46079, CVE-2026-46080, CVE-2026-46081, CVE-2026-46082, CVE-2026-46083, CVE-2026-46084, CVE-2026-46085, CVE-2026-46086, CVE-2026-46087, CVE-2026-46088, CVE-2026-46089, CVE-2026-46090, CVE-2026-46091, CVE-2026-46092, CVE-2026-46093, CVE-2026-46094, CVE-2026-46095, CVE-2026-46096, CVE-2026-46097, CVE-2026-46098, CVE-2026-46099, CVE-2026-46100, CVE-2026-46101, CVE-2026-46102, CVE-2026-46103, CVE-2026-46104, CVE-2026-46105, CVE-2026-46106, CVE-2026-46107, CVE-2026-46108, CVE-2026-46109, CVE-2026-46110, CVE-2026-46111, CVE-2026-46112, CVE-2026-46113, CVE-2026-46114, CVE-2026-46115, CVE-2026-46116, CVE-2026-46117, CVE-2026-46118, CVE-2026-46119, CVE-2026-46120, CVE-2026-46121, CVE-2026-46122, CVE-2026-46123, CVE-2026-46124, CVE-2026-46125, CVE-2026-46126, CVE-2026-46127, CVE-2026-46128, CVE-2026-46129, CVE-2026-46130, CVE-2026-46131, CVE-2026-46132, CVE-2026-46133, CVE-2026-46134, CVE-2026-46135, CVE-2026-46136, CVE-2026-46137, CVE-2026-46138, CVE-2026-46139, CVE-2026-46140, CVE-2026-46141, CVE-2026-46142, CVE-2026-46143, CVE-2026-46144, CVE-2026-46145, CVE-2026-46146, CVE-2026-46147, CVE-2026-46148, CVE-2026-46149, CVE-2026-46150, CVE-2026-46151, CVE-2026-46152, CVE-2026-46153, CVE-2026-46154, CVE-2026-46155, CVE-2026-46156, CVE-2026-46157, CVE-2026-46158, CVE-2026-46159, CVE-2026-46160, CVE-2026-46161, CVE-2026-46162, CVE-2026-46163, CVE-2026-46164, CVE-2026-46165, CVE-2026-46166, CVE-2026-46167, CVE-2026-46168, CVE-2026-46169, CVE-2026-46170, CVE-2026-46171, CVE-2026-46172, CVE-2026-46173, CVE-2026-46174, CVE-2026-46175, CVE-2026-46176, CVE-2026-46177, CVE-2026-46178, CVE-2026-46179, CVE-2026-46180, CVE-2026-46181, CVE-2026-46182, CVE-2026-46183, CVE-2026-46184, CVE-2026-46185, CVE-2026-46186, CVE-2026-46187, CVE-2026-46188, CVE-2026-46189, CVE-2026-46190, CVE-2026-46191, CVE-2026-46192, CVE-2026-46193, CVE-2026-46194, CVE-2026-46195, CVE-2026-46196, CVE-2026-46197, CVE-2026-46198, CVE-2026-46199, CVE-2026-46200, CVE-2026-46201, CVE-2026-46202, CVE-2026-46203, CVE-2026-46204, CVE-2026-46205, CVE-2026-46206, CVE-2026-46207, CVE-2026-46208, CVE-2026-46209, CVE-2026-46210, CVE-2026-46211, CVE-2026-46212, CVE-2026-46213, CVE-2026-46214, CVE-2026-46215, CVE-2026-46216, CVE-2026-46218, CVE-2026-46219, CVE-2026-46220, CVE-2026-46221, CVE-2026-46222, CVE-2026-46223, CVE-2026-46224, CVE-2026-46225, CVE-2026-46226, CVE-2026-46227, CVE-2026-46228, CVE-2026-46229, CVE-2026-46230, CVE-2026-46231, CVE-2026-46232, CVE-2026-46233, CVE-2026-46234, CVE-2026-46235, CVE-2026-46236, CVE-2026-46238, CVE-2026-46239, CVE-2026-46240, CVE-2026-46241, CVE-2026-46242, CVE-2026-46243, CVE-2026-46244, CVE-2026-46273, CVE-2026-46274, CVE-2026-46275, CVE-2026-46276, CVE-2026-46277, CVE-2026-46278, CVE-2026-46279, CVE-2026-46280, CVE-2026-46281, CVE-2026-46282, CVE-2026-46283, CVE-2026-46284, CVE-2026-46285, CVE-2026-46286, CVE-2026-46287, CVE-2026-46288, CVE-2026-46289, CVE-2026-46290, CVE-2026-46291, CVE-2026-46292, CVE-2026-46293, CVE-2026-46294, CVE-2026-46295, CVE-2026-46296, CVE-2026-46297, CVE-2026-46298, CVE-2026-46299, CVE-2026-46301, CVE-2026-46302, CVE-2026-46303, CVE-2026-46304, CVE-2026-46305, CVE-2026-46306, CVE-2026-46307, CVE-2026-46308, CVE-2026-46309, CVE-2026-46310, CVE-2026-46311, CVE-2026-46312, CVE-2026-46313, CVE-2026-46314, CVE-2026-46315, CVE-2026-46316, CVE-2026-46317, CVE-2026-46318, CVE-2026-46319, CVE-2026-46320, CVE-2026-46321, CVE-2026-46322, CVE-2026-46323, CVE-2026-46324, CVE-2026-46332, CVE-2026-52904, CVE-2026-52905, CVE-2026-52906, CVE-2026-52907, CVE-2026-52911, CVE-2026-52912, CVE-2026-52913, CVE-2026-52914, CVE-2026-52915, CVE-2026-52916, CVE-2026-52918, CVE-2026-52919, CVE-2026-52920, CVE-2026-52921, CVE-2026-52922, CVE-2026-52923, CVE-2026-52925, CVE-2026-52926, CVE-2026-52927, CVE-2026-52928, CVE-2026-52931, CVE-2026-52932, CVE-2026-52933, CVE-2026-52934, CVE-2026-52936, CVE-2026-52937, CVE-2026-52941, CVE-2026-52943, CVE-2026-52944, CVE-2026-52949, CVE-2026-52950, CVE-2026-52951, CVE-2026-52952, CVE-2026-52953, CVE-2026-52954, CVE-2026-52955, CVE-2026-52956, CVE-2026-52957, CVE-2026-52958, CVE-2026-52959, CVE-2026-52960, CVE-2026-52961, CVE-2026-52962, CVE-2026-52963, CVE-2026-52964, CVE-2026-52965, CVE-2026-52967, CVE-2026-52968, CVE-2026-52969, CVE-2026-52970, CVE-2026-52971, CVE-2026-52973, CVE-2026-52974, CVE-2026-52975, CVE-2026-52976, CVE-2026-52977, CVE-2026-52978, CVE-2026-52979, CVE-2026-52980, CVE-2026-52981, CVE-2026-52982, CVE-2026-52983, CVE-2026-52984, CVE-2026-52985, CVE-2026-52986, CVE-2026-52987, CVE-2026-52988, CVE-2026-52989, CVE-2026-52990, CVE-2026-52991, CVE-2026-52992, CVE-2026-52993, CVE-2026-52994, CVE-2026-52995, CVE-2026-52996, CVE-2026-52997, CVE-2026-52998, CVE-2026-52999, CVE-2026-53000, CVE-2026-53001, CVE-2026-53002, CVE-2026-53003, CVE-2026-53004, CVE-2026-53005, CVE-2026-53006, CVE-2026-53007, CVE-2026-53008, CVE-2026-53009, CVE-2026-53010, CVE-2026-53011, CVE-2026-53012, CVE-2026-53013, CVE-2026-53014, CVE-2026-53015, CVE-2026-53016, CVE-2026-53017, CVE-2026-53018, CVE-2026-53019, CVE-2026-53020, CVE-2026-53021, CVE-2026-53022, CVE-2026-53023, CVE-2026-53024, CVE-2026-53025, CVE-2026-53026, CVE-2026-53027, CVE-2026-53028, CVE-2026-53029, CVE-2026-53030, CVE-2026-53031, CVE-2026-53032, CVE-2026-53033, CVE-2026-53034, CVE-2026-53035, CVE-2026-53036, CVE-2026-53037, CVE-2026-53038, CVE-2026-53039, CVE-2026-53040, CVE-2026-53041, CVE-2026-53042, CVE-2026-53043, CVE-2026-53044, CVE-2026-53045, CVE-2026-53046, CVE-2026-53047, CVE-2026-53048, CVE-2026-53049, CVE-2026-53050, CVE-2026-53051, CVE-2026-53052, CVE-2026-53053, CVE-2026-53054, CVE-2026-53055, CVE-2026-53056, CVE-2026-53057, CVE-2026-53058, CVE-2026-53059, CVE-2026-53060, CVE-2026-53061, CVE-2026-53062, CVE-2026-53063, CVE-2026-53064, CVE-2026-53065, CVE-2026-53066, CVE-2026-53067, CVE-2026-53068, CVE-2026-53069, CVE-2026-53070, CVE-2026-53071, CVE-2026-53072, CVE-2026-53073, CVE-2026-53074, CVE-2026-53075, CVE-2026-53076, CVE-2026-53077, CVE-2026-53078, CVE-2026-53079, CVE-2026-53080, CVE-2026-53081, CVE-2026-53082, CVE-2026-53083, CVE-2026-53084, CVE-2026-53085, CVE-2026-53086, CVE-2026-53087, CVE-2026-53088, CVE-2026-53089, CVE-2026-53090, CVE-2026-53091, CVE-2026-53092, CVE-2026-53093, CVE-2026-53094, CVE-2026-53095, CVE-2026-53096, CVE-2026-53097, CVE-2026-53098, CVE-2026-53099, CVE-2026-53100, CVE-2026-53101, CVE-2026-53102, CVE-2026-53103, CVE-2026-53104, CVE-2026-53105, CVE-2026-53106, CVE-2026-53107, CVE-2026-53108, CVE-2026-53109, CVE-2026-53110, CVE-2026-53111, CVE-2026-53112, CVE-2026-53113, CVE-2026-53114, CVE-2026-53115, CVE-2026-53116, CVE-2026-53117, CVE-2026-53118, CVE-2026-53119, CVE-2026-53120, CVE-2026-53121, CVE-2026-53122, CVE-2026-53123, CVE-2026-53124, CVE-2026-53125, CVE-2026-53126, CVE-2026-53127, CVE-2026-53128, CVE-2026-53129, CVE-2026-53130, CVE-2026-53174, CVE-2026-53277, CVE-2026-53278, CVE-2026-53279, CVE-2026-53280, CVE-2026-53281, CVE-2026-53282, CVE-2026-53283, CVE-2026-53284, CVE-2026-53285, CVE-2026-53286, CVE-2026-53287, CVE-2026-53288, CVE-2026-53289, CVE-2026-53290, CVE-2026-53291, CVE-2026-53292, CVE-2026-53293, CVE-2026-53294, CVE-2026-53295, CVE-2026-53296, CVE-2026-53297, CVE-2026-53298, CVE-2026-53299, CVE-2026-53300, CVE-2026-53301, CVE-2026-53302, CVE-2026-53303, CVE-2026-53304, CVE-2026-53305, CVE-2026-53306, CVE-2026-53307, CVE-2026-53308, CVE-2026-53309, CVE-2026-53310, CVE-2026-53311, CVE-2026-53312, CVE-2026-53313, CVE-2026-53314, CVE-2026-53315, CVE-2026-53316, CVE-2026-53317, CVE-2026-53318, CVE-2026-53319, CVE-2026-53320, CVE-2026-53321, CVE-2026-53322, CVE-2026-53323, CVE-2026-53324, CVE-2026-53357, CVE-2026-53358, CVE-2026-53360, CVE-2026-53364, CVE-2026-53365)