CVE-2026-74542
netfs: Fix folio_queue ENOMEM in writeback by adding a mempool
Description
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix folio_queue ENOMEM in writeback by adding a mempool Fix the handling of folio_queue allocation failure in writeback by adding a mempool and passing in gfp_t flags to the rolling buffer functions that allocate memory, using the mempool if gfp != GFP_KERNEL. This is then extended upwards and the gfp to be used for a request is stored in the netfs_io_request struct and is then used for both requests and subrequests, eliminating the sleeping loops there. The failure caused: folio != NULL WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919
INFO
Published Date :
Aug. 15, 2026, 1:17 p.m.
Last Modified :
Aug. 15, 2026, 1:17 p.m.
Remotely Exploit :
No
Source :
416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products
The following products are affected by CVE-2026-74542
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 to include the fix for folio_queue ENOMEM.
- Ensure correct GFP flags are used for memory allocation.
- Utilize the mempool for memory allocation when GFP is not GFP_KERNEL.
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-2026-74542.
| URL | Resource |
|---|---|
| https://git.kernel.org/stable/c/1d78d56c43ef3768183e8370e7367b162700e049 | |
| https://git.kernel.org/stable/c/3f6d7f8a5416d852648d15a05e895f1195ee8a85 |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-74542 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-2026-74542
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-2026-74542 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-74542 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.
-
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': 'cd0277ed0c188dd40e7744e89299af7b78831ca4', 'lessThan': '3f6d7f8a5416d852648d15a05e895f1195ee8a85', 'versionType': 'git'}, {'status': 'affected', 'version': 'cd0277ed0c188dd40e7744e89299af7b78831ca4', 'lessThan': '1d78d56c43ef3768183e8370e7367b162700e049', 'versionType': 'git'}], 'programFiles': ['fs/netfs/buffered_read.c', 'fs/netfs/internal.h', 'fs/netfs/main.c', 'fs/netfs/objects.c', 'fs/netfs/read_pgpriv2.c', 'fs/netfs/rolling_buffer.c', 'fs/netfs/write_issue.c', 'include/linux/netfs.h', 'include/linux/rolling_buffer.h'], 'defaultStatus': 'unaffected'}, {'repo': 'https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git', 'vendor': 'Linux', 'product': 'Linux', 'versions': [{'status': 'affected', 'version': '6.12'}, {'status': 'unaffected', 'version': '0', 'lessThan': '6.12', 'versionType': 'semver'}, {'status': 'unaffected', 'version': '7.1.8', 'versionType': 'semver', 'lessThanOrEqual': '7.1.*'}, {'status': 'unaffected', 'version': '7.2-rc6', 'versionType': 'original_commit_for_fix', 'lessThanOrEqual': '*'}], 'programFiles': ['fs/netfs/buffered_read.c', 'fs/netfs/internal.h', 'fs/netfs/main.c', 'fs/netfs/objects.c', 'fs/netfs/read_pgpriv2.c', 'fs/netfs/rolling_buffer.c', 'fs/netfs/write_issue.c', 'include/linux/netfs.h', 'include/linux/rolling_buffer.h'], 'defaultStatus': 'affected'}] Added Description In the Linux kernel, the following vulnerability has been resolved: netfs: Fix folio_queue ENOMEM in writeback by adding a mempool Fix the handling of folio_queue allocation failure in writeback by adding a mempool and passing in gfp_t flags to the rolling buffer functions that allocate memory, using the mempool if gfp != GFP_KERNEL. This is then extended upwards and the gfp to be used for a request is stored in the netfs_io_request struct and is then used for both requests and subrequests, eliminating the sleeping loops there. The failure caused: folio != NULL WARNING: fs/netfs/write_issue.c:603 at netfs_writepages+0x883/0xa10 fs/netfs/write_issue.c:603, CPU#3: syz.0.17/5919 Added Reference https://git.kernel.org/stable/c/1d78d56c43ef3768183e8370e7367b162700e049 Added Reference https://git.kernel.org/stable/c/3f6d7f8a5416d852648d15a05e895f1195ee8a85