CVE-2026-97610
In the Linux kernel, the following vulnerability has been resolved: netfs: Fix uninitialized return value in netfs_unbuffered_write() If preparation of the first subrequest fails, netfs_unbuffered_write() exits its loop before ret is initialized. The empty-iterator check can do the same. For synchronous writes, netfs_unbuffered_write_iter_locked() may then return an unrelated error instead of wreq->error. This is reachable through CIFS if cifs_prepare_write() fails to reopen the file or obtain credits. Initialize ret to 0 so the caller returns wreq->error if no data was written, or the number of bytes already written otherwise. Found with Clang's -Wconditional-uninitialized.
Affected versions
Linux kernel versions
6.18.17,
6.19.7,
7.0
and later are affected. Fixed in
6.18.53,
7.2.7,
7.3-rc3
and their respective stable series.
References
3 totalFrequently asked questions
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What is CVE-2026-97610?
CVE-2026-97610 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 6.18.17 onward and has been patched in 6.18.53, 7.2.7 and 7.3-rc3. CVE-2026-97610 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-2026-97610?
Yes. CVE-2026-97610 has been patched. Fixed versions include 6.18.53, 7.2.7 and 7.3-rc3. If you are running Linux kernel 6.18.17 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-97610 actively exploited?
No. CVE-2026-97610 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.