CVE-2026-72437
md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry
Description
In the Linux kernel, the following vulnerability has been resolved: md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry When a read is retried, raid1_read_request() may be called with a pre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT read, the bio is completed and the function returns immediately. In this case the existing r1_bio is leaked. This fixes a leak of pre-allocated r1_bio structures for retried reads.
INFO
Published Date :
Aug. 15, 2026, 6:22 a.m.
Last Modified :
Aug. 15, 2026, 6:22 a.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-72437
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
No affected product recoded yet
Solution
- Update the Linux kernel.
- Apply the specific patch for raid1.
- Ensure proper resource management in raid1.
- Test for bio structure leaks after update.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-72437.
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-72437 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-72437
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-72437 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-72437 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67
Aug. 15, 2026
Action Type Old Value New Value Added Affected [{'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5aa705039c4fca84575539bfa2b8a28454a3d2ca', 'lessThan': 'd1eda529a4bf6b866d02755723ee0eb1f037a5ed', 'versionType': 'git'}, {'status': 'affected', 'version': '5aa705039c4fca84575539bfa2b8a28454a3d2ca', 'lessThan': 'c66ed3e6371f5dba8f5d8ab810d6683ddc99201e', 'versionType': 'git'}, {'status': 'affected', 'version': '5aa705039c4fca84575539bfa2b8a28454a3d2ca', 'lessThan': 'db58075bc9c2ad2731f9c063859b47104bc2e7ef', 'versionType': 'git'}, {'status': 'affected', 'version': '5aa705039c4fca84575539bfa2b8a28454a3d2ca', 'lessThan': '6d92dbd73d19a0622f60352ce9d9379f7a760112', 'versionType': 'git'}, {'status': 'affected', 'version': '5aa705039c4fca84575539bfa2b8a28454a3d2ca', 'lessThan': 'c6e6354295845698d2fdfa20b71fc404786f7e93', 'versionType': 'git'}, {'status': 'affected', 'version': '5aa705039c4fca84575539bfa2b8a28454a3d2ca', 'lessThan': '69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12', 'versionType': 'git'}], 'programFiles': ['drivers/md/raid1.c'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '5.17'}, {'status': 'unaffected', 'version': '0', 'lessThan': '5.17', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '6.1.178', 'versionType': 'semver', 'lessThanOrEqual': '6.1.*'}, {'status': 'unaffected', 'version': '6.6.145', 'versionType': 'semver', 'lessThanOrEqual': '6.6.*'}, {'status': 'unaffected', 'version': '6.12.97', 'versionType': 'semver', 'lessThanOrEqual': '6.12.*'}, {'status': 'unaffected', 'version': '6.18.40', 'versionType': 'semver', 'lessThanOrEqual': '6.18.*'}, {'status': 'unaffected', 'version': '7.1.5', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc1', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['drivers/md/raid1.c'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: md/raid1: free r1_bio when REQ_NOWAIT is set and read would block on retry When a read is retried, raid1_read_request() may be called with a pre-allocated r1_bio. If wait_read_barrier() fails for a REQ_NOWAIT read, the bio is completed and the function returns immediately. In this case the existing r1_bio is leaked. This fixes a leak of pre-allocated r1_bio structures for retried reads. Added Reference https://git.kernel.org/stable/c/69ad6ce47f9bf2b9fe0ed69b042db993d33bbf12 Added Reference https://git.kernel.org/stable/c/6d92dbd73d19a0622f60352ce9d9379f7a760112 Added Reference https://git.kernel.org/stable/c/c66ed3e6371f5dba8f5d8ab810d6683ddc99201e Added Reference https://git.kernel.org/stable/c/c6e6354295845698d2fdfa20b71fc404786f7e93 Added Reference https://git.kernel.org/stable/c/d1eda529a4bf6b866d02755723ee0eb1f037a5ed Added Reference https://git.kernel.org/stable/c/db58075bc9c2ad2731f9c063859b47104bc2e7ef