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CVE-2026-43026: 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: ctnetlink: zero expect NAT fields when CTA_EXPECT_NAT absent ctnetlink_alloc_expect() allocates expectations from a non-zeroing slab cache via nf_ct_expect_alloc(). When CTA_EXPECT_NAT is not present in the netlink message, saved_addr and saved_proto are never initialized. Stale data from a previous slab occupant can then be dumped to userspace by ctnetlink_exp_dump_expect(), which checks these fields to decide whether to emit CTA_EXPECT_NAT. The safe sibling nf_ct_expect_init(), used by the packet path, explicitly zeroes these fields. Zero saved_addr, saved_proto and dir in the else branch, guarded by IS_ENABLED(CONFIG_NF_NAT) since these fields only exist when NAT is enabled. Confirmed by priming the expect slab with NAT-bearing expectations, freeing them, creating a new expectation without CTA_EXPECT_NAT, and observing that the ctnetlink dump emits a spurious CTA_EXPECT_NAT containing stale data from the prior allocation.

    Засегнати продукти

    • Linux Linux: 076a0ca02644657b13e4af363f487ced2942e9cb преди a5a89db6981a1ddf2314bf50cb49db5a3146185f; 076a0ca02644657b13e4af363f487ced2942e9cb преди 1c2ebdeff8d088a2e47ae25d7b38447249adace2; 076a0ca02644657b13e4af363f487ced2942e9cb преди a64b7bf84b4d5ea54218c5d374ec87fff9000f43; 076a0ca02644657b13e4af363f487ced2942e9cb преди 2898080c054ea4d6ddfaaf21bbedbc229a9a8376; 076a0ca02644657b13e4af363f487ced2942e9cb преди fd002ff2ea030cbfb0188a11b3c60ce7f84485f4; 076a0ca02644657b13e4af363f487ced2942e9cb преди 929f7a9a7aad9404a5867216c3f8738232355b38; 076a0ca02644657b13e4af363f487ced2942e9cb преди bff0f4f06f12d6d9bc565a3e1378abd4f6f5ce36; 076a0ca02644657b13e4af363f487ced2942e9cb преди 35177c6877134a21315f37d57a5577846225623e
    • Linux Linux: 3.4; преди 3.4; 5.10.253 до 5.10.*; 5.15.203 до 5.15.*; 6.1.168 до 6.1.*; 6.6.134 до 6.6.*; 6.12.81 до 6.12.*; 6.18.22 до 6.18.*; 6.19.12 до 6.19.*; 7.0 до *
    • Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *
    • Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: V3.1.6 преди *
    • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *

    История

    • 1 май 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-43026: Linux | freedomonline.bg