CVE-2026-72438
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < d1324b41dabd26787559efaeb430643c627c1eb0 | affected |
| Linux | Linux | c9aa889b035fca4598ae985a0f0c76ebbb547ad2 < 393d687131d8aa8c7e4de2cb494438e145d20fc2 | affected |
| Linux | Linux | 39db562b3fedb93978a7e42dd216b306740959f8 | affected |
| Linux | Linux | 5.15.111 < 5.16 | affected |
| Linux | Linux | 5.17 | affected |
| Linux | Linux | 0 < 5.17 | unaffected |
| Linux | Linux | 7.1.5 <= 7.1.* | unaffected |
| Linux | Linux | 7.2 <= * | unaffected |
Weaknesses
References
- https://git.kernel.org/stable/c/d1324b41dabd26787559efaeb430643c627c1eb0
- https://git.kernel.org/stable/c/393d687131d8aa8c7e4de2cb494438e145d20fc2
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