Към съдържанието
Търсене

CVE-2026-53059: Linux, грешка в паметта

6.3

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, при специфични условия, с обикновен потребителски вход и без действие от потребителя.

CVE радар: още уязвимости от този вид

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: dm log: fix out-of-bounds write due to region_count overflow The local variable region_count in create_log_context() is declared as unsigned int (32-bit), but dm_sector_div_up() returns sector_t (64-bit). When a device-mapper target has a sufficiently large ti->len with a small region_size, the division result can exceed UINT_MAX. The truncated value is then used to calculate bitset_size, causing clean_bits, sync_bits, and recovering_bits to be allocated far smaller than needed for the actual number of regions. Subsequent log operations (log_set_bit, log_clear_bit, log_test_bit) use region indices derived from the full untruncated region space, causing out-of-bounds writes to kernel heap memory allocated by vmalloc. This can be reproduced by creating a mirror target whose region_count overflows 32 bits: dmsetup create bigzero --table '0 8589934594 zero' dmsetup create mymirror --table '0 8589934594 mirror \ core 2 2 nosync 2 /dev/mapper/bigzero 0 \ /dev/mapper/bigzero 0' The status output confirms the truncation (sync_count=1 instead of 4294967297, because 0x100000001 was truncated to 1): $ dmsetup status mymirror 0 8589934594 mirror 2 254:1 254:1 1/4294967297 ... This leads to a kernel crash in core_in_sync: BUG: scheduling while atomic: (udev-worker)/9150/0x00000000 RIP: 0010:core_in_sync+0x14/0x30 [dm_log] CR2: 0000000000000008 Fixing recursive fault but reboot is needed! Fix by widening the local region_count to sector_t and adding an explicit overflow check before the value is assigned to lc->region_count.

    Засегнати продукти

    • Linux Linux: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 44ab8875ae4a2842bde2d756bed195d375e0debb; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди defe483e47173768c227532694dc78cb65db5f09; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 3ec74da927b4e171a6fc0e77b1188ba4d019af51; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди d4ac87567f86a55c3c92e9a5144dcd943a9772a1; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 12bd5b88e91a02785244ff1d20fb157e96e9cdc8; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди b455903eed4558982be0811f5b7f44f6bbc4ff57; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди 4ec8323b9f0764a14d532b1ae9b87f8a9fecb867; 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 преди c20e36b7631d83e7535877f08af8b0af72c44b1a
    • Linux Linux: 2.6.12; преди 2.6.12; 5.10.258 до 5.10.*; 5.15.209 до 5.15.*; 6.1.175 до 6.1.*; 6.6.141 до 6.6.*; 6.12.91 до 6.12.*; 6.18.33 до 6.18.*; 7.0.10 до 7.0.*; от 7.1 нататък
    • Red Hat: още 14 продукта, добавени от Red Hat

      Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 10.0 Extended Update Support, Red Hat Enterprise Linux 7 Extended Lifecycle Support, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.4 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.6 Advanced Mission Critical Update Support, Red Hat Enterprise Linux 8.6 Extended Update Support Long-Life Add-On, Red Hat Enterprise Linux 8.8 Telecommunications Update Service, Red Hat Enterprise Linux 8.8 Update Services for SAP Solutions, Red Hat Enterprise Linux 9, Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions, Red Hat Enterprise Linux 9.6 Extended Update Support, Red Hat Enterprise Linux 6

    Вид слабост

    История

    • 24 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53059: Linux, грешка в паметта | freedomonline.bg