CVE-2026-53013: Linux

Описание

Оригинално описание

In the Linux kernel, the following vulnerability has been resolved: macvlan: fix macvlan_get_size() not reserving space for IFLA_MACVLAN_BC_CUTOFF macvlan_get_size() does not account for IFLA_MACVLAN_BC_CUTOFF, but macvlan_fill_info() conditionally includes it when port->bc_cutoff != 1. This causes nla_put_s32() to fail with -EMSGSIZE when the netlink skb runs out of space, triggering a WARN_ON in rtnetlink and preventing the interface from being dumped. The bug can be reproduced with: ip link add macvlan0 link eth0 type macvlan mode bridge ip link set macvlan0 type macvlan bc_cutoff 0 ip -d link show macvlan0 # fails with -EMSGSIZE The bc_cutoff feature was added in commit 954d1fa1ac93 ("macvlan: Add netlink attribute for broadcast cutoff"), which added the nla_put_s32() call in macvlan_fill_info() but missed adding the corresponding nla_total_size(4) in macvlan_get_size(). A follow-up commit 55cef78c244d ("macvlan: add forgotten nla_policy for IFLA_MACVLAN_BC_CUTOFF") fixed the missing nla_policy entry but still did not fix the size calculation.

Засегнати продукти

• Linux Linux: 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 преди 4979252758387b338ca968ba7e0515b0ae2257e3; 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 преди 77ecfa4e27f282d224215895ddfbeb916fc75e24; 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 преди b6b7154e9f5d75b608ceb2d05b376de8c638c40e; 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 преди 1c004f14ccdc11585625c168bb9a7c5e1b8afb0c; 954d1fa1ac93aa8a66f7d9a9ba545cf7f020d348 преди fa92a77b0ed4d5f11a71665a232ac5a54a4b055d
• Linux Linux: 6.4; преди 6.4; 6.6.141 до 6.6.*; 6.12.91 до 6.12.*; 6.18.33 до 6.18.*; 7.0.10 до 7.0.*; 7.1 до *

История

Други уязвимости в Linux Linux

• 8.1CVE-2026-99270
• 7.8CVE-2026-99269
• CVE-2026-99268
• CVE-2026-99266
• CVE-2026-99267

Първоизточници

• https://www.cve.org/CVERecord?id=CVE-2026-53013
• https://nvd.nist.gov/vuln/detail/CVE-2026-53013
• https://git.kernel.org/stable/c/4979252758387b338ca968ba7e0515b0ae2257e3
• https://git.kernel.org/stable/c/77ecfa4e27f282d224215895ddfbeb916fc75e24
• https://git.kernel.org/stable/c/b6b7154e9f5d75b608ceb2d05b376de8c638c40e
• https://git.kernel.org/stable/c/1c004f14ccdc11585625c168bb9a7c5e1b8afb0c
• https://git.kernel.org/stable/c/fa92a77b0ed4d5f11a71665a232ac5a54a4b055d