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CVE-2026-43238: Linux

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CVSS

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Вероятност да бъде експлоатирана в следващите 30 дни (EPSS)

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    Описание

    Оригинално описание

    In the Linux kernel, the following vulnerability has been resolved: net/sched: act_skbedit: fix divide-by-zero in tcf_skbedit_hash() Commit 38a6f0865796 ("net: sched: support hash selecting tx queue") added SKBEDIT_F_TXQ_SKBHASH support. The inclusive range size is computed as: mapping_mod = queue_mapping_max - queue_mapping + 1; The range size can be 65536 when the requested range covers all possible u16 queue IDs (e.g. queue_mapping=0 and queue_mapping_max=U16_MAX). That value cannot be represented in a u16 and previously wrapped to 0, so tcf_skbedit_hash() could trigger a divide-by-zero: queue_mapping += skb_get_hash(skb) % params->mapping_mod; Compute mapping_mod in a wider type and reject ranges larger than U16_MAX to prevent params->mapping_mod from becoming 0 and avoid the crash.

    Засегнати продукти

    • Linux Linux: 38a6f0865796e26fc38fff4858f681d9ae76fa0f преди 59809fda4da7730cfe84a948033f47eb45db073d; 38a6f0865796e26fc38fff4858f681d9ae76fa0f преди 9c735a7d98c982a786b0db71eb6566ee00aaa04f; 38a6f0865796e26fc38fff4858f681d9ae76fa0f преди 015cebdfcb97b5347fb7f598ea712a281cb35840; 38a6f0865796e26fc38fff4858f681d9ae76fa0f преди 4ece5eb4836f8ff03b9004dc2430a7169f282851; 38a6f0865796e26fc38fff4858f681d9ae76fa0f преди 3c2b95b26860bd6f8e2310d31ea1200d3f8f173e; 38a6f0865796e26fc38fff4858f681d9ae76fa0f преди be054cc66f739a9ba615dba9012a07fab8e7dd6f
    • Linux Linux: 5.19; преди 5.19; 6.1.165 до 6.1.*; 6.6.128 до 6.6.*; 6.12.75 до 6.12.*; 6.18.16 до 6.18.*; 6.19.6 до 6.19.*; от 7.0 нататък

    История

    • 6 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-43238: Linux | freedomonline.bg