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CVE-2026-23279: Linux

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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: wifi: mac80211: fix NULL pointer dereference in mesh_rx_csa_frame() In mesh_rx_csa_frame(), elems->mesh_chansw_params_ie is dereferenced at lines 1638 and 1642 without a prior NULL check: ifmsh->chsw_ttl = elems->mesh_chansw_params_ie->mesh_ttl; ... pre_value = le16_to_cpu(elems->mesh_chansw_params_ie->mesh_pre_value); The mesh_matches_local() check above only validates the Mesh ID, Mesh Configuration, and Supported Rates IEs. It does not verify the presence of the Mesh Channel Switch Parameters IE (element ID 118). When a received CSA action frame omits that IE, ieee802_11_parse_elems() leaves elems->mesh_chansw_params_ie as NULL, and the unconditional dereference causes a kernel NULL pointer dereference. A remote mesh peer with an established peer link (PLINK_ESTAB) can trigger this by sending a crafted SPECTRUM_MGMT/CHL_SWITCH action frame that includes a matching Mesh ID and Mesh Configuration IE but omits the Mesh Channel Switch Parameters IE. No authentication beyond the default open mesh peering is required. Crash confirmed on kernel 6.17.0-5-generic via mac80211_hwsim: BUG: kernel NULL pointer dereference, address: 0000000000000000 Oops: Oops: 0000 [#1] SMP NOPTI RIP: 0010:ieee80211_mesh_rx_queued_mgmt+0x143/0x2a0 [mac80211] CR2: 0000000000000000 Fix by adding a NULL check for mesh_chansw_params_ie after mesh_matches_local() returns, consistent with how other optional IEs are guarded throughout the mesh code. The bug has been present since v3.13 (released 2014-01-19).

    Засегнати продукти

    • Linux Linux: 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди 753ad20dcbe36b67088c7770d8fc357d7cc43e08; 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди f061336f072ab03fd29270ae61fede46bf8fd69d; 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди 2b5f282b1b7241ef624c3399a1cdff0bb1a3eeab; 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди 22a9adea7e26d236406edc0ea00b54351dd56b9c; 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди f5d8af683410a8c82e48b51291915bd612523d9a; 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди cc6d5a3c0a854aeae00915fc5386570c86029c60; 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди be8b82c567fda86f2cbb43b7208825125bb31421; 8f2535b92d685c68db4bc699dd78462a646f6ef9 преди 017c1792525064a723971f0216e6ef86a8c7af11
    • Linux Linux: 3.13; преди 3.13; 5.10.253 до 5.10.*; 5.15.203 до 5.15.*; 6.1.167 до 6.1.*; 6.6.130 до 6.6.*; 6.12.77 до 6.12.*; 6.18.17 до 6.18.*; 6.19.7 до 6.19.*; от 7.0 нататък
    • Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: всички версии

    История

    • 25 март 2026 Публикувано

    Други уязвимости в Linux Linux

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    CVE-2026-23279: Linux | freedomonline.bg