CVE-2026-74542
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
Affected versions
Linux kernel versions
6.12
and later are affected. Fixed in
7.1.8,
7.2
and their respective stable series.
References
2 totalFrequently asked questions
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What is CVE-2026-74542?
CVE-2026-74542 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.12 onward and has been patched in 7.1.8 and 7.2. CVE-2026-74542 has not been confirmed as actively exploited and is not listed in the CISA KEV catalog.
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Is there a patch available for CVE-2026-74542?
Yes. CVE-2026-74542 has been patched. Fixed versions include 7.1.8 and 7.2. If you are running Linux kernel 6.12 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-74542 actively exploited?
No. CVE-2026-74542 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.