CVE-2026-72438

HIGH

MEDIUM Priority: 0.04 BB Relevance: 75/100

Published: 2026-08-15 Modified: 2026-10-30 First seen: 2026-10-30 Status: active

Attack Surface

Network Low Complexity No Auth No Interaction

CVSS Vector Breakdown

AV: Network

AC: Low

PR: None

UI: None

S: Unchanged

C: None

I: None

A: High

Description

In the Linux kernel, the following vulnerability has been resolved: md/raid10: fix writes_pending and barrier reference leaks on discard failures raid10_make_request() acquires a writes_pending reference with md_write_start() before calling raid10_handle_discard(). Several failure paths in raid10_handle_discard() complete the bio and return without releasing the corresponding reference, causing md_write_end() to be skipped. Call md_write_end() before returning from these failure paths to keep writes_pending accounting balanced. Additionally, discard split allocation failures can occur after wait_barrier() succeeds. Those paths return without calling allow_barrier(), leaking the associated barrier reference. Release the barrier before returning from those paths.

Affected Software (9)

Vendor	Product	Version
Linux	Linux	c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 2d264c00beadcc67f16d683ab27eed28c047ba2e
Linux	Linux	c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 80ac31cce55432034a9eb98262c92ace7866e494
Linux	Linux	c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < fea33968592559a55a3f5a96a6386bebcaf988a8
Linux	Linux	c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 11b35d1906a7277a3d64afe34224133b44327328
Linux	Linux	c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < d1324b41dabd26787559efaeb430643c627c1eb0
Linux	Linux	c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 393d687131d8aa8c7e4de2cb494438e145d20fc2
Linux	Linux	39db562b3fedb93978a7e42dd216b306740959f8
Linux	Linux	5.15.111 < 5.16
Linux	Linux	5.17