In the Linux kernel, the following vulnerability has been resolved: KVM: x86: Mark target gfn of emulated atomic instruction as dirty When emulating an atomic access on behalf of the guest, mark the target gfn dirty if the CMPXCHG by KVM is attempted and doesn't fault. This fixes a bug where KVM effectively corrupts guest memory during live migration by writing to guest memory without informing userspace that the page is dirty. Marking the page dirty got unintentionally dropped when KVM's emulated CMPXCHG was converted to do a user access. Before that, KVM explicitly mapped the guest page into kernel memory, and marked the page dirty during the unmap phase. Mark the page dirty even if the CMPXCHG fails, as the old data is written back on failure, i.e. the page is still written. The value written is guaranteed to be the same because the operation is atomic, but KVM's ABI is that all writes are dirty logged regardless of the value written. And more importantly, that's what KVM did before the buggy commit. Huge kudos to the folks on the Cc list (and many others), who did all the actual work of triaging and debugging. base-commit: 6769ea8da8a93ed4630f1ce64df6aafcaabfce64

The remote Ubuntu 20.04 LTS / 22.04 LTS host has a package installed that is affected by multiple vulnerabilities as referenced in the USN-6898-1 advisory.

    Ziming Zhang discovered that the DRM driver for VMware Virtual GPU did not properly handle certain error     conditions, leading to a NULL pointer dereference. A local attacker could possibly trigger this     vulnerability to cause a denial of service. (CVE-2022-38096)

    Gui-Dong Han discovered that the software RAID driver in the Linux kernel contained a race condition,     leading to an integer overflow vulnerability. A privileged attacker could possibly use this to cause a     denial of service (system crash). (CVE-2024-23307)

    It was discovered that a race condition existed in the Bluetooth subsystem in the Linux kernel when     modifying certain settings values through debugfs. A privileged local attacker could use this to cause a     denial of service. (CVE-2024-24857, CVE-2024-24858, CVE-2024-24859)

    Bai Jiaju discovered that the Xceive XC4000 silicon tuner device driver in the Linux kernel contained a     race condition, leading to an integer overflow vulnerability. An attacker could possibly use this to cause     a denial of service (system crash). (CVE-2024-24861)

    Chenyuan Yang discovered that the Unsorted Block Images (UBI) flash device volume management subsystem did     not properly validate logical eraseblock sizes in certain situations. An attacker could possibly use this     to cause a denial of service (system crash). (CVE-2024-25739)

    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:

    - ARM64 architecture;

    - RISC-V architecture;

    - x86 architecture;

    - Block layer subsystem;

    - Accessibility subsystem;

    - Android drivers;

    - Bluetooth drivers;

    - Clock framework and drivers;

    - Data acquisition framework and drivers;

    - Cryptographic API;

    - DMA engine subsystem;

    - GPU drivers;

    - HID subsystem;

    - I2C subsystem;

    - IRQ chip drivers;

    - Multiple devices driver;

    - VMware VMCI Driver;

    - MMC subsystem;

    - Network drivers;

    - Microsoft Azure Network Adapter (MANA) driver;

    - Device tree and open firmware driver;

    - PCI subsystem;

    - S/390 drivers;

    - SCSI drivers;

    - Freescale SoC drivers;

    - Trusted Execution Environment drivers;

    - TTY drivers;

    - USB subsystem;

    - VFIO drivers;

    - Framebuffer layer;

    - Xen hypervisor drivers;

    - File systems infrastructure;

    - BTRFS file system;

    - Ext4 file system;

    - FAT file system;

    - Network file system client;

    - Network file system server daemon;

    - NILFS2 file system;

    - Pstore file system;

    - SMB network file system;

    - UBI file system;

    - Netfilter;

    - BPF subsystem;

    - Core kernel;

    - PCI iomap interfaces;

    - Memory management;

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

    - Bluetooth subsystem;

    - Ethernet bridge;

    - Networking core;

    - IPv4 networking;

    - IPv6 networking;

    - MAC80211 subsystem;

    - IEEE 802.15.4 subsystem;

    - NFC subsystem;

    - Open vSwitch;

    - RDS protocol;

    - Network traffic control;

    - SMC sockets;

    - Unix domain sockets;

    - eXpress Data Path;

    - Key management;

    - ALSA SH drivers;

    - KVM core; (CVE-2024-35944, CVE-2024-35789, CVE-2024-35819, CVE-2024-35796, CVE-2024-35817,     CVE-2024-35950, CVE-2024-35851, CVE-2024-35918, CVE-2024-26961, CVE-2024-35990, CVE-2024-26629,     CVE-2024-35823, CVE-2024-35922, CVE-2024-26969, CVE-2024-36007, CVE-2024-35989, CVE-2024-35822,     CVE-2024-26654, CVE-2024-35879, CVE-2024-27395, CVE-2024-35855, CVE-2024-27008, CVE-2024-26988,     CVE-2024-35912, CVE-2024-35900, CVE-2024-26956, CVE-2024-27018, CVE-2024-26922, CVE-2024-26950,     CVE-2024-35849, CVE-2024-26999, CVE-2024-36006, CVE-2024-26970, CVE-2024-26937, CVE-2024-35821,     CVE-2024-35982, CVE-2024-35907, CVE-2024-35884, CVE-2024-26929, CVE-2024-35905, CVE-2024-35915,     CVE-2024-35910, CVE-2024-35886, CVE-2024-35930, CVE-2024-36008, CVE-2024-27004, CVE-2024-26984,     CVE-2024-35877, CVE-2024-35958, CVE-2024-35895, CVE-2024-26981, CVE-2024-27393, CVE-2024-35973,     CVE-2024-36029, CVE-2024-26931, CVE-2024-35934, CVE-2024-35902, CVE-2024-27013, CVE-2024-26951,     CVE-2024-35901, CVE-2024-35938, CVE-2024-35936, CVE-2024-26958, CVE-2024-27059, CVE-2024-27001,     CVE-2024-35825, CVE-2024-35925, CVE-2024-36004, CVE-2024-26960, CVE-2024-26923, CVE-2024-35927,     CVE-2024-27009, CVE-2024-35847, CVE-2024-35871, CVE-2024-27020, CVE-2024-26811, CVE-2024-35897,     CVE-2024-26994, CVE-2024-35935, CVE-2024-35978, CVE-2024-26934, CVE-2024-26828, CVE-2023-52699,     CVE-2024-26810, CVE-2024-35890, CVE-2024-35955, CVE-2024-35899, CVE-2024-35885, CVE-2024-36020,     CVE-2024-26813, CVE-2024-26814, CVE-2024-27016, CVE-2024-35852, CVE-2024-27437, CVE-2024-35933,     CVE-2024-35857, CVE-2024-26973, CVE-2024-35813, CVE-2024-27015, CVE-2024-35791, CVE-2024-26687,     CVE-2024-35976, CVE-2024-35853, CVE-2024-35969, CVE-2024-35940, CVE-2024-35809, CVE-2024-35888,     CVE-2023-52488, CVE-2024-26926, CVE-2024-36005, CVE-2024-26996, CVE-2024-27000, CVE-2024-26957,     CVE-2024-26974, CVE-2024-26977, CVE-2024-36031, CVE-2024-26966, CVE-2024-35815, CVE-2024-35960,     CVE-2024-35806, CVE-2024-26642, CVE-2023-52880, CVE-2024-26925, CVE-2024-26989, CVE-2024-26965,     CVE-2024-35997, CVE-2024-26993, CVE-2024-26955, CVE-2024-35872, CVE-2024-35893, CVE-2024-35896,     CVE-2024-35805, CVE-2024-27019, CVE-2024-35898, CVE-2024-35970, CVE-2024-35988, CVE-2024-35854,     CVE-2024-26976, CVE-2024-35984, CVE-2024-35804, CVE-2024-35807, CVE-2024-26964, CVE-2024-36025,     CVE-2024-27396, CVE-2024-26935, CVE-2024-35785, CVE-2024-26812, CVE-2024-26817)

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.

ID	Name	Product	Family	Severity
202404	Ubuntu 20.04 LTS / 22.04 LTS : Linux kernel vulnerabilities (USN-6898-1)	Nessus	Ubuntu Local Security Checks	high
201009	SUSE SLED15 / SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:2190-1)	Nessus	SuSE Local Security Checks	critical
200853	SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:2135-1)	Nessus	SuSE Local Security Checks	high
200508	SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:2019-1)	Nessus	SuSE Local Security Checks	critical
200462	SUSE SLES15 / openSUSE 15 Security Update : kernel (SUSE-SU-2024:2008-1)	Nessus	SuSE Local Security Checks	critical

Detections

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CVE-2024-35804

medium

Tenable Plugins

high

critical

high

critical

critical