CVE-2026-64576

CVE CVE-2026-64576EUVD EUVD-2026-53270Published 2026-08-05T08:09:32.000ZLast changed 2026-08-08T15:13:13.000ZCVSS 7.1

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: nexthop: initialize extack in nh_res_bucket_migrate() nh_res_bucket_migrate() passes an uninitialized netlink_ext_ack to call_nexthop_res_bucket_notifiers(). When nh_notifier_res_bucket_info_init() fails (e.g. the kzalloc returns -ENOMEM), the error is propagated back before any notifier sets extack._msg, and the error path formats the stale pointer with pr_err_ratelimited("%s\n", extack._msg). With CONFIG_INIT_STACK_NONE this dereferences uninitialized stack memory: Oops: general protection fault, probably for non-canonical address ... KASAN: maybe wild-memory-access in range [...] RIP: 0010:string (lib/vsprintf.c:730) vsnprintf (lib/vsprintf.c:2945) _printk (kernel/printk/printk.c:2504) nh_res_bucket_migrate (net/ipv4/nexthop.c:1816) nh_res_table_upkeep (net/ipv4/nexthop.c:1866) rtm_new_nexthop (net/ipv4/nexthop.c:3323) rtnetlink_rcv_msg (net/core/rtnetlink.c:7076) netlink_sendmsg (net/netlink/af_netlink.c:1900) Kernel panic - not syncing: Fatal exception Zero-initialize extack so _msg is NULL on error paths that never set it.

Source: EUVD (ENISA), in the words of the advisory.

Products the advisory names

These come from the advisory itself, not from any check we performed.

Linux — Linux patch: 0; patch: 6.18.42; patch: 7.2-rc5; patch: 7.1.6; patch: 6.12.101; 7c37c7e00411b3d1e0c5292368317aca69d1f324 <6347c5314cee49f364aaf2e40ff15415a57a116e; 7c37c7e00411b3d1e0c5292368317aca69d1f324 <18506d7263768d76ac8e057ba55a4d9da50aad66; 7c37c7e00411b3d1e0c5292368317aca69d1f324 <d536bf205c71f700f6de2086038c3e1d77724715; 5.13; 7c37c7e00411b3d1e0c5292368317aca69d1f324 <3081702ea5aca0aeed9c1ade8eadf6cde8db6b7d; 7c37c7e00411b3d1e0c5292368317aca69d1f324 <c0936c131a71657afc635d0db2ab096d15d473e1; patch: 6.6.148

The versions shown are the advisory's own. Patchlage compares no version numbers and derives no judgement from them — which version is installed is something a person has to look up.

Carried in the product catalogue

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Linux — Linux

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