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CVE-2026-53043: Linux

9.1

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 по мрежата, без особени условия, без вход и без действие от потребителя.

    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: ocfs2/dlm: validate qr_numregions in dlm_match_regions() Patch series "ocfs2/dlm: fix two bugs in dlm_match_regions()". In dlm_match_regions(), the qr_numregions field from a DLM_QUERY_REGION network message is used to drive loops over the qr_regions buffer without sufficient validation. This series fixes two issues: - Patch 1 adds a bounds check to reject messages where qr_numregions exceeds O2NM_MAX_REGIONS. The o2net layer only validates message byte length; it does not constrain field values, so a crafted message can set qr_numregions up to 255 and trigger out-of-bounds reads past the 1024-byte qr_regions buffer. - Patch 2 fixes an off-by-one in the local-vs-remote comparison loop, which uses '<=' instead of '<', reading one entry past the valid range even when qr_numregions is within bounds. This patch (of 2): The qr_numregions field from a DLM_QUERY_REGION network message is used directly as loop bounds in dlm_match_regions() without checking against O2NM_MAX_REGIONS. Since qr_regions is sized for at most O2NM_MAX_REGIONS (32) entries, a crafted message with qr_numregions > 32 causes out-of-bounds reads past the qr_regions buffer. Add a bounds check for qr_numregions before entering the loops.

    Засегнати продукти

    • Linux Linux: ea2034416b54700e30371f2ad6517cbb94674083 преди d3d5efade0c79dac1cac98c0cb1115432f804439; ea2034416b54700e30371f2ad6517cbb94674083 преди f69551139caf6d24242a0ad049ee46b264e3aee0; ea2034416b54700e30371f2ad6517cbb94674083 преди 1f8b91275912cd428289c1fb424bebd7ff5302bd; ea2034416b54700e30371f2ad6517cbb94674083 преди f37de46149db49abd2b24f4f0c5a88cf4dfb5f47; ea2034416b54700e30371f2ad6517cbb94674083 преди 6c6e8fc3c007319981647b410c29bb5775048551; ea2034416b54700e30371f2ad6517cbb94674083 преди 3f474c33ebc2e2ca3fcb587d7de4375348f13373; ea2034416b54700e30371f2ad6517cbb94674083 преди 3c2d0de23ae4be22b6c18e8f0915be74d3b5fb21; ea2034416b54700e30371f2ad6517cbb94674083 преди 7ab3fbb01bc6d79091bc375e5235d360cd9b78be
    • Linux Linux: 2.6.37; преди 2.6.37; 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

    История

    • 24 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53043: Linux | freedomonline.bg