CVE-2026-53388
In the Linux kernel, the following vulnerability has been resolved: fuse: re-lock request before replacing page cache folio fuse_try_move_folio() unlocks the request on entry but does not re-lock it on the success path. This means fuse_chan_abort() can end the request and free the fuse_io_args (eg fuse_readpages_end()) while the subsequent copy chain logic after fuse_try_move_folio() accesses the fuse_io_args, leading to use-after-free issues. Fix this by calling lock_request() before replace_page_cache_folio(). This ensures the request is locked on the success path which will prevent the fuse_io_args from being freed while the later copying logic runs, and also ensures that the ap->folios[i]->mapping is never null since ap->folios[i] will always point to the newfolio after replace_page_cache_folio().
Affected versions
Linux kernel versions
2.6.35
and later are affected. Fixed in
5.15.211,
6.1.177,
6.6.144,
6.12.95,
6.18.37,
7.0.14,
7.1.2,
7.2-rc1
and their respective stable series.
References
8 totalFrequently asked questions
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What is CVE-2026-53388?
CVE-2026-53388 is a unscored severity Linux kernel vulnerability . It affects Linux kernel versions from 2.6.35 onward and has been patched in 5.15.211, 6.1.177, 6.6.144 and others. CVE-2026-53388 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-2026-53388?
Yes — CVE-2026-53388 has been patched. Fixed versions include 5.15.211, 6.1.177, 6.6.144 and others. If you are running Linux kernel 2.6.35 or later up to the fix versions, apply the relevant patch for your kernel branch.
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Is CVE-2026-53388 actively exploited?
No — CVE-2026-53388 has not been confirmed as actively exploited. It is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.