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CVE-2026-74719: 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/smc: fix qentry overwrite for CONFIRM_LINK and ADD_LINK_CONT in smc_llc_event_handler() The SMC_LLC_CONFIRM_LINK / SMC_LLC_ADD_LINK_CONT branch in smc_llc_event_handler() stores an incoming qentry into the local LLC flow without first checking whether a qentry is already pending. If a malicious or buggy peer sends a second CONFIRM_LINK or ADD_LINK_CONT request while a flow is active and flow->qentry is already set, smc_llc_flow_qentry_set() overwrites the pointer without freeing the previous allocation, leaking one kmalloc-96 object per spurious message. The sibling SMC_LLC_DELETE_LINK branch already has the correct !flow->qentry guard. Apply the same guard to the CONFIRM_LINK/ADD_LINK_CONT branch so that a duplicate message when qentry is already occupied falls through to break and is freed by the kfree(qentry) at the out: label, rather than silently leaking the existing allocation. The response direction (smc_llc_rx_response()) is unaffected: it already guards with flow->qentry at the equivalent site and drops duplicate responses correctly.

    Засегнати продукти

    • Linux Linux: 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди e384f3cba6ea709f5b2272b1770db4ce14047f78; 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди a1e980d7a9e7ee6faf4f5fd7b450413b969af26d; 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди e0eb87677c76b157cdf8eb7c1f19e56227165a33; 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди 06734dfeaeba886aab1bf147249195b888ac3e4d; 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди c23c409228629107203d3c3e95fff1473173f1a6; 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди 10cb31b2b74cb664c6c95cf72364d7d5c483ab82; 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди bfc336a9fbbf09805f3dfe25c195a4db90af2846; 0fb0b02bd6fd26cba38002be4a6bbcae2228fd44 преди 976245094925bab9bc39366b2e9ab44ffcde61d0
    • Linux Linux: 5.8; преди 5.8; 5.10.265 до 5.10.*; 5.15.216 до 5.15.*; 6.1.183 до 6.1.*; 6.6.152 до 6.6.*; 6.12.104 до 6.12.*; 6.18.45 до 6.18.*; 7.1.9 до 7.1.*; от 7.2 нататък

    История

    • 22 август 2026 Публикувано

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    CVE-2026-74719: Linux | freedomonline.bg