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CVE-2026-23085: Linux, грешка в паметта

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Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: irqchip/gic-v3-its: Avoid truncating memory addresses On 32-bit machines with CONFIG_ARM_LPAE, it is possible for lowmem allocations to be backed by addresses physical memory above the 32-bit address limit, as found while experimenting with larger VMSPLIT configurations. This caused the qemu virt model to crash in the GICv3 driver, which allocates the 'itt' object using GFP_KERNEL. Since all memory below the 4GB physical address limit is in ZONE_DMA in this configuration, kmalloc() defaults to higher addresses for ZONE_NORMAL, and the ITS driver stores the physical address in a 32-bit 'unsigned long' variable. Change the itt_addr variable to the correct phys_addr_t type instead, along with all other variables in this driver that hold a physical address. The gicv5 driver correctly uses u64 variables, while all other irqchip drivers don't call virt_to_phys or similar interfaces. It's expected that other device drivers have similar issues, but fixing this one is sufficient for booting a virtio based guest.

Засегнати продукти

  • Linux Linux: cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e преди e332b3b69e5b3acf07204a4b185071bab15c2b88; cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e преди e2f9c751f73a2d5bb62d94ab030aec118a811f27; cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e преди 85215d633983233809f7d4dad163b953331b8238; cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e преди 1b323391560354d8c515de8658b057a1daa82adb; cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e преди 084ba3b99f2dfd991ce7e84fb17117319ec3cd9f; cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e преди 03faa61eb4b9ca9aa09bd91d4c3773d8e7b1ac98; cc2d3216f53c9fff0030eb71cacc4ce5f39d1d7e преди 8d76a7d89c12d08382b66e2f21f20d0627d14859
  • Linux Linux: 3.19; преди 3.19; 5.10.249 до 5.10.*; 5.15.199 до 5.15.*; 6.1.162 до 6.1.*; 6.6.122 до 6.6.*; 6.12.68 до 6.12.*; 6.18.8 до 6.18.*; от 6.19 нататък

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История

  • 4 февруари 2026 Публикувано

Други уязвимости в Linux Linux

Първоизточници

CVE-2026-23085: Linux, грешка в паметта | freedomonline.bg