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CVE-2024-53097 — mm: krealloc: Fix MTE false alarm in __do_krealloc

Affected: Linux

In the Linux kernel, the following vulnerability has been resolved:

mm: krealloc: Fix MTE false alarm in __do_krealloc

This patch addresses an issue introduced by commit 1a83a716ec233 ("mm: krealloc: consider spare memory for __GFP_ZERO") which causes MTE (Memory Tagging Extension) to falsely report a slab-out-of-bounds error.

The problem occurs when zeroing out spare memory in __do_krealloc. The original code only considered software-based KASAN and did not account for MTE. It does not reset the KASAN tag before calling memset, leading to a mismatch between the pointer tag and the memory tag, resulting in a false positive.

Example of the error: ================================================================== swapper/0: BUG: KASAN: slab-out-of-bounds in __memset+0x84/0x188 swapper/0: Write at addr f4ffff8005f0fdf0 by task swapper/0/1 swapper/0: Pointer tag: [f4], memory tag: [fe] swapper/0: swapper/0: CPU: 4 UID: 0 PID: 1 Comm: swapper/0 Not tainted 6.12. swapper/0: Hardware name: MT6991(ENG) (DT) swapper/0: Call trace: swapper/0: dump_backtrace+0xfc/0x17c swapper/0: show_stack+0x18/0x28 swapper/0: dump_stack_lvl+0x40/0xa0 swapper/0: print_report+0x1b8/0x71c swapper/0: kasan_report+0xec/0x14c swapper/0: __do_kernel_fault+0x60/0x29c swapper/0: do_bad_area+0x30/0xdc swapper/0: do_tag_check_fault+0x20/0x34 swapper/0: do_mem_abort+0x58/0x104 swapper/0: el1_abort+0x3c/0x5c swapper/0: el1h_64_sync_handler+0x80/0xcc swapper/0: el1h_64_sync+0x68/0x6c swapper/0: __…

USN-7288-1 — linux, linux-lowlatency vulnerabilities

Affected: Ubuntu:22.04:LTS: linux, Ubuntu:22.04:LTS: linux-lowlatency

Attila Szász discovered that the HFS+ file system implementation in the Linux Kernel contained a heap overflow vulnerability. An attacker could use a specially crafted file system image that, when mounted, could cause a denial of service (system crash) or possibly execute arbitrary code. (CVE-2025-0927)

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; - x86 architecture; - Block layer subsystem; - ACPI drivers; - GPU drivers; - HID subsystem; - I2C subsystem; - IIO ADC drivers; - IIO subsystem; - InfiniBand drivers; - IOMMU subsystem; - IRQ chip drivers; - Multiple devices driver; - Media drivers; - Network drivers; - STMicroelectronics network drivers; - Parport drivers; - Pin controllers subsystem; - Direct Digital Synthesis drivers; - TCM subsystem; - TTY drivers; - USB Dual Role (OTG-ready) Controller drivers; - USB Serial drivers; - USB Type-C support driver; - USB Type-C Connector System Software Interface driver; - BTRFS file system; - File systems infrastructure; - Network file system (NFS) client; - NILFS2 file system; - NTFS3 file system; - SMB network file system; - User-space API (UAPI); - io_uring subsystem; - BPF subsystem; - Timer substystem drivers; - Tracing infrastructure; - Closures library; - Memory management; - Amateur Radio…