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CVE-2026-31427: 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: netfilter: nf_conntrack_sip: fix use of uninitialized rtp_addr in process_sdp process_sdp() declares union nf_inet_addr rtp_addr on the stack and passes it to the nf_nat_sip sdp_session hook after walking the SDP media descriptions. However rtp_addr is only initialized inside the media loop when a recognized media type with a non-zero port is found. If the SDP body contains no m= lines, only inactive media sections (m=audio 0 ...) or only unrecognized media types, rtp_addr is never assigned. Despite that, the function still calls hooks->sdp_session() with &rtp_addr, causing nf_nat_sdp_session() to format the stale stack value as an IP address and rewrite the SDP session owner and connection lines with it. With CONFIG_INIT_STACK_ALL_ZERO (default on most distributions) this results in the session-level o= and c= addresses being rewritten to 0.0.0.0 for inactive SDP sessions. Without stack auto-init the rewritten address is whatever happened to be on the stack. Fix this by pre-initializing rtp_addr from the session-level connection address (caddr) when available, and tracking via a have_rtp_addr flag whether any valid address was established. Skip the sdp_session hook entirely when no valid address exists.

    Засегнати продукти

    • Linux Linux: 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди faa6ea32797a1847790514ff0da1be1d09771580; 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди 82baeb871e8f04906bc886273fdf0209e1754eb3; 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди 6e5e3c87b7e6212f1d8414fc2e4d158b01e12025; 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди fe463e76c9b4b0b43b5ee8961b4c500231f1a3f6; 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди 7edca70751b9bdb5b83eed53cde21eccf3c86147; 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди 01f34a80ac23ae90b1909b94b4ed05343a62f646; 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди 52fdda318ef2362fc5936385bcb8b3d0328ee629; 4ab9e64e5e3c0516577818804aaf13a630d67bc9 преди 6a2b724460cb67caed500c508c2ae5cf012e4db4
    • Linux Linux: 2.6.26; преди 2.6.26; 5.10.253 до 5.10.*; 5.15.203 до 5.15.*; 6.1.168 до 6.1.*; 6.6.131 до 6.6.*; 6.12.80 до 6.12.*; 6.18.21 до 6.18.*; 6.19.11 до 6.19.*; от 7.0 нататък
    • Siemens: още 3 продукта, добавени от Siemens

      SIMATIC S7-1500 CPU 1518-4 PN/DP MFP, SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP, SIPLUS S7-1500 CPU 1518-4 PN/DP MFP

    История

    • 13 април 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-31427: Linux | freedomonline.bg