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CVE-2026-53134: 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: nft_fib: fix stale stack leak via the OIFNAME register For NFT_FIB_RESULT_OIFNAME the destination register is declared with len = IFNAMSIZ (four 32-bit registers), but on the lookup-fail, RTN_LOCAL and oif-mismatch paths nft_fib{4,6}_eval() only writes one register via "*dest = 0". The remaining three registers are left as whatever was on the stack in nft_do_chain()'s struct nft_regs, and a downstream expression that loads the register span can leak that uninitialised kernel stack to userspace. The NFTA_FIB_F_PRESENT existence check has the same shape: it is only meaningful for NFT_FIB_RESULT_OIF, yet it was accepted for any result type while the eval stores a single byte via nft_reg_store8(), leaving the rest of the declared span stale. Fix both: - replace the bare "*dest = 0" in the eval with nft_fib_store_result(), which strscpy_pad()s the whole IFNAMSIZ for OIFNAME (and is already used on the other early-return path), and - restrict NFTA_FIB_F_PRESENT to NFT_FIB_RESULT_OIF and declare its destination as a single u8, so the marked span matches the one byte the eval writes.

    Засегнати продукти

    • Linux Linux: f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди 6744e49fe51bfba26522acc2d0e9703cb41d8e50; f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди eca18feed38b3377a2ec5d1f22af1170c55d0171; f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди d19ddef8c327a4773ff81f8e51027d1e0b4cf069; f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди eb8a8124484dbc3c2b543e207da39bbccb703d31; f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди 8c84885e9790823828bb8084736ea15769b1ac16; f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди 84d8f58cf28a0415413f43ba7148f7bacd4c1b6e; f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди 3544210609f6d1db282bbdeca639104ef624c393; f6d0cbcf09c506b9b022df8f9d7693a7cec3c732 преди ab185e0c4fb82dfba6fb86f8271e06f931d9c64c
    • Linux Linux: 4.10; преди 4.10; 5.10.259 до 5.10.*; 5.15.210 до 5.15.*; 6.1.176 до 6.1.*; 6.6.143 до 6.6.*; 6.12.94 до 6.12.*; 6.18.36 до 6.18.*; 7.0.13 до 7.0.*; от 7.1 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

    • 25 юни 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-53134: Linux | freedomonline.bg