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CVE-2026-72369: 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: minix: avoid overflow in bitmap block count calculation minix_check_superblock() uses minix_blocks_needed() to verify that the on-disk imap and zmap block counts are large enough for the advertised inode and zone counts. The helper currently performs DIV_ROUND_UP() in unsigned int arithmetic. A Minix v3 image can set s_ninodes or s_zones near UINT_MAX so the addition inside DIV_ROUND_UP() wraps to zero. That makes a zero imap/zmap block count look valid, after which minix_fill_super() can dereference s_imap[0] or s_zmap[0] even though no bitmap buffers were allocated. Impact: mounting a crafted Minix v3 image whose s_ninodes or s_zones is near UINT_MAX makes minix_check_superblock() accept a zero bitmap-block count and minix_fill_super() dereference s_imap[0]/s_zmap[0], panicking the kernel. The divisor is the bitmap capacity in bits, blocksize * 8, which is always a power of two: minix_fill_super() obtains the block size through sb_set_blocksize(), and blk_validate_block_size() rejects any size that is not a power of two. Use DIV_ROUND_UP_POW2(), which divides before adding the round-up term and so cannot overflow for a power-of-two divisor.

    Засегнати продукти

    • Linux Linux: 2bb588cede1c1969e49c0a2822c8cb8b346b7682 преди a11ebaab50d27d6c4c78506f84ff36452e0b901d; f57ccd4657c7f082dc47e5b9e18a883bb5f9118f преди 959c95340a9e19cd333b4c18935fdeecbb2f319d; 31fefc18096cdc5549cfa54964d90e0b3229aedc преди abe3536a4bedcc43de80b6d4d7e3d57e9ba382a5; 8c97a6ddc95690a938ded44b4e3202f03f15078c преди 8a29e60e2176b02e04f8737c8b32b696230eb0c5; 8c97a6ddc95690a938ded44b4e3202f03f15078c преди fb3e566cafc38fe3ba35e6843a2d529a3748870c; a051ecf5c5b0387840dc210413ed3bc7fbdaa69c; d791c544efd6b9c944b43cf7f502e5bcb02fb941; 66c7c239c65341f99ae388d4d53dc9df2bcb9925; 1efc128ee4adbc23e082715425ff895449d233bc; 6.6.128 преди 6.6.145; 6.12.75 преди 6.12.97; 6.18.16 преди 6.18.40; 5.10.252 преди 5.11; 5.15.202 преди 5.16; 6.1.165 преди 6.2; 6.19.6 преди 6.20
    • Linux Linux: 7.0; преди 7.0; 6.6.145 до 6.6.*; 6.12.97 до 6.12.*; 6.18.40 до 6.18.*; 7.1.5 до 7.1.*; 7.2 до *

    История

    • 15 август 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-72369: Linux | freedomonline.bg