Answer in brief
CVE-2026-90077 records a Unknown severity vulnerability in net: fix a resource leak in copy_net_ns() error handling path. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=08027f6b790be1e444e4182fb4dc53faa6539d16 <76c847e80d2b6be047707d58e8e05eedbe2593ad || >=08027f6b790be1e444e4182fb4dc53faa6539d16 <e69bde4eb566aea8fa97cbb93e0bab608964f1a5 || >=08027f6b790be1e444e4182fb4dc53faa6539d16 <3220b62fbb8a55feebd2a826d5ead0f49f09ed5a | 76c847e80d2b6be047707d58e8e05eedbe2593ad, e69bde4eb566aea8fa97cbb93e0bab608964f1a5, 3220b62fbb8a55feebd2a826d5ead0f49f09ed5a |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
Sep 17, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 17, 2026
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.
Quoted source text, attributed separately from HOL analysis.