CVE-2026-74542
Received Received - Intake

BaseFortify

Publication date: 2026-08-15

Last updated on: 2026-08-15

Assigner: kernel.org

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

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-08-15
Last Modified
2026-08-15
Generated
2026-08-15
AI Q&A
2026-08-15
EPSS Evaluated
N/A
NVD
CVE-2026-74542
EUVD
EUVD-2026-59735

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
linux linux_kernel *

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-UNKNOWN

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a Linux kernel vulnerability where writeback operations could fail due to ENOMEM errors when allocating memory for folio_queue. The fix introduces a mempool to handle allocation failures and passes gfp_t flags to memory allocation functions, preventing system hangs or crashes during writeback operations.

Detection Guidance

This vulnerability is specific to the Linux kernel's netfs component and may manifest as a WARNING in kernel logs during writeback operations. Check kernel logs for messages from fs/netfs/write_issue.c, particularly around netfs_writepages. Use commands like dmesg | grep netfs or journalctl -k | grep netfs to search for related errors.

Impact Analysis

If exploited, this could cause system instability during file write operations, leading to crashes or data corruption. Users might experience application hangs or unexpected system behavior when writing files to disk.

Mitigation Strategies

Apply the latest Linux kernel update that includes the fix for this issue. If immediate patching is not possible, monitor system performance and kernel logs for signs of the ENOMEM condition during writeback operations. Consider reducing I/O load temporarily as a workaround.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-74542. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart