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CVE-2026-53401: Linux

7.8

CVSS 3.1

Няма данни

Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

Няма потвърждение

Атакува се

Няма данни

Време до експлоатация

Атакува се локално, без особени условия, с обикновен потребителски вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: fbdev: omap2: fix use-after-free in omapfb_mmap omapfb_mmap() has a race condition with OMAPFB_SETUP_PLANE ioctl that can lead to use-after-free: The fb_mmap() entry point holds mm_lock but not lock (fb_info->lock), while ioctl handlers like OMAPFB_SETUP_PLANE hold lock but not mm_lock. This allows concurrent execution. In omapfb_mmap(): 1. rg = omapfb_get_mem_region(ofbi->region); // Get old region ref 2. start = omapfb_get_region_paddr(ofbi); // Read from NEW region 3. len = fix->smem_len; // Read from NEW region 4. vm_iomap_memory(vma, start, len); // Map NEW region memory 5. atomic_inc(&rg->map_count); // Increment OLD region! Concurrently, OMAPFB_SETUP_PLANE can: - Reassign ofbi->region = new_rg - Update fix->smem_len - OMAPFB_SETUP_MEM then checks NEW region's map_count (0!) and frees it This leaves userspace with a mapping to freed physical memory. The fix is to read all required values (start, len) from the same region reference (rg) that will have its map_count incremented, preventing the region from being freed while still mapped.

    Засегнати продукти

    • Linux Linux: 078ff546a806b2c2ab74c25c8edd4c6d4680656a преди a1a00f664a409b3412f9e1408c12890cffe50362; 078ff546a806b2c2ab74c25c8edd4c6d4680656a преди 5e10b1747547c3815e90d28166e92144835e065f; 078ff546a806b2c2ab74c25c8edd4c6d4680656a преди 986d5fafb73b8b866651399934b66d690f49135a; 078ff546a806b2c2ab74c25c8edd4c6d4680656a преди 8363c219d88e78daaee5665117a0380442989338; 078ff546a806b2c2ab74c25c8edd4c6d4680656a преди 6eb6ebcc8590007ad59ddccc8b5f9201655b33f8; 078ff546a806b2c2ab74c25c8edd4c6d4680656a преди 7958e67375aa111522086286bba13cfc0816ce8d
    • Linux Linux: 2.6.36; преди 2.6.36; 6.1.191 до 6.1.*; 6.6.160 до 6.6.*; 6.12.114 до 6.12.*; 6.18.57 до 6.18.*; 7.1.3 до 7.1.*; 7.2 до *

    История

    • 19 юли 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53401: Linux | freedomonline.bg