CVE-2026-53381virtiofs: fix UAF on submount umount
Updated under an hour ago ()
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No exploitation reported and no EPSS estimate yet.
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In the Linux kernel, the following vulnerability has been resolved: virtiofs: fix UAF on submount umount iput() called from fuse_release_end() can Oops if the super block has already been destroyed. Normally this is prevented by waiting for num_waiting to go down to zero before commencing with super block shutdown. This only works, however, for the last submount instance, as the wait counter is per connection, not per superblock. Revert to using synchronous release requests for the auto_submounts case, which is virtiofs only at this time.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Analyzed
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | from 548e1f2bac1d4df91a6138f26bb4ab00323fd948 before 607a1d4c42f649e6197567c0448fd9ebb316cd42; from cfd1aa3e2b71f3327cb373c45a897c9028c62b35 before 1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e; 83b375c6efef69b1066ad2d79601221e7892745a builds before 0b809199ff87c44487e516a725dd4be2185712ce; from bfd17b6138df0122a95989457d8e18ce0b86165e before 2181a09ba980f142650fb053666350ead4471cfe; from b26923512dbe57ae4917bafd31396d22a9d1691a before 97c4691653d145dcc699eca5d3aba3219a520f1f; 26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 builds before 2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9; from 26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 before 39a2b95e008665c14f84e50ed411d898df7cd11b; from 26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 before e09412a714bcd49375198427bb4aa005037a9d6f; and 8 more ranges | CNA record |
linux linux_kernel linux:linux_kernel | from 5.10.246 before 5.10.260; from 5.15.196 before 5.15.211; from 6.1.158 before 6.1.177; from 6.6.115 before 6.6.144; from 6.12.54 before 6.12.95; from 6.17.4 before 6.18.37; from 6.19 before 7.0.14; from 7.1 before 7.1.2 | NVD |
References
- https://git.kernel.org/stable/c/607a1d4c42f649e6197567c0448fd9ebb316cd42patch
- https://git.kernel.org/stable/c/1cc0e3a0c6499aaaa2f21a4fcbba388486afb25epatch
- https://git.kernel.org/stable/c/0b809199ff87c44487e516a725dd4be2185712cepatch
- https://git.kernel.org/stable/c/2181a09ba980f142650fb053666350ead4471cfepatch
- https://git.kernel.org/stable/c/97c4691653d145dcc699eca5d3aba3219a520f1fpatch
- https://git.kernel.org/stable/c/2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9patch
- https://git.kernel.org/stable/c/39a2b95e008665c14f84e50ed411d898df7cd11bpatch
- https://git.kernel.org/stable/c/e09412a714bcd49375198427bb4aa005037a9d6fpatch
- https://git.kernel.org/stable/c/06b41351779e9289e8785694ade9042ae85e41eapatch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.