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CVE-2026-23304: 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: ipv6: fix NULL pointer deref in ip6_rt_get_dev_rcu() l3mdev_master_dev_rcu() can return NULL when the slave device is being un-slaved from a VRF. All other callers deal with this, but we lost the fallback to loopback in ip6_rt_pcpu_alloc() -> ip6_rt_get_dev_rcu() with commit 4832c30d5458 ("net: ipv6: put host and anycast routes on device with address"). KASAN: null-ptr-deref in range [0x0000000000000108-0x000000000000010f] RIP: 0010:ip6_rt_pcpu_alloc (net/ipv6/route.c:1418) Call Trace: ip6_pol_route (net/ipv6/route.c:2318) fib6_rule_lookup (net/ipv6/fib6_rules.c:115) ip6_route_output_flags (net/ipv6/route.c:2607) vrf_process_v6_outbound (drivers/net/vrf.c:437) I was tempted to rework the un-slaving code to clear the flag first and insert synchronize_rcu() before we remove the upper. But looks like the explicit fallback to loopback_dev is an established pattern. And I guess avoiding the synchronize_rcu() is nice, too.

    Засегнати продукти

    • Linux Linux: 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди d542e2ac7f9e288d49735be0775611547ca4e0ee; 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди a73fe9f4ae84a239d5b2686f47a58c158aee2eb4; 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди 4a48fe59f29f673a3d042d679f26629a9c3e29d4; 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди 581800298313c9fd75e94985e6d37d21b7e35d34; 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди 3310fc11fc47387d1dd4759b0bc961643ea11c7f; 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди 0b5a7826020706057cc5a9d9009e667027f221ee; 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди ae88c8256547b63980770a9ea7be73a15900d27e; 4832c30d5458387ff2533ff66fbde26ad8bb5a2d преди 2ffb4f5c2ccb2fa1c049dd11899aee7967deef5a
    • Linux Linux: 4.14; преди 4.14; 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.*; 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 SIMATIC S7-1500 TM MFP - GNU/Linux subsystem: преди *
    • Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: V3.1.6 преди *

    История

    • 25 март 2026 Публикувано

    Други уязвимости в Linux Linux

    Първоизточници

    CVE-2026-23304: Linux | freedomonline.bg