CVE-2026-90077

CVE CVE-2026-90077EUVD EUVD-2026-81938Published 2026-09-17T16:05:56.000Z

What the advisory describes

In the Linux kernel, the following vulnerability has been resolved: net: fix a resource leak in copy_net_ns() error handling path Currently, preinit_net() does two things: (1) call ns_common_init() which might fail (2) initialize resources which does not fail However, preinit_net() is returning early when (1) fails, and copy_net_ns() is jumping to the dec_ucounts: label. As a result, resources allocated by net_alloc() are leaking. We need to call key_remove_domain() and net_passive_dec() in order to release resources allocated by net_alloc(). We cannot simply jump to the put_userns: label when preinit_net() failed, for (2) is not yet done. But we can reorder (1) and (2), for there is no dependency between (1) and (2). Therefore, this patch decouples (1) from preinit_net() and changes preinit_net() back to a void function, and calls ns_common_init() after preinit_net() succeeded. Then, we can jump to immediately after ns_common_free() of the put_userns: label.

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 08027f6b790be1e444e4182fb4dc53faa6539d16 <3220b62fbb8a55feebd2a826d5ead0f49f09ed5a; 08027f6b790be1e444e4182fb4dc53faa6539d16 <76c847e80d2b6be047707d58e8e05eedbe2593ad; patch: 7.2.6; 08027f6b790be1e444e4182fb4dc53faa6539d16 <e69bde4eb566aea8fa97cbb93e0bab608964f1a5; patch: 0; patch: 6.18.52; patch: 7.3-rc1; 6.18

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

An estate covering these products can be recorded in Patchlage. An advisory about them appears in the next morning's situation report.

• Linux — Linux

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