CVE-2026-53381 | In the Linux kernel, the following vulnerability has been re… | CVSS 7.8 HIGH

Description

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.

Metadata

CVE ID: CVE-2026-53381
State: PUBLISHED
Assigner: Linux
Reserved: 2026-06-09 07:44 UTC
Published: 2026-07-19 11:59 UTC
Last updated: 2026-07-20 13:39 UTC
Vendor / Product: Linux / Linux
Sources: cve.org · NVD

Severity & Metrics

7.8 HIGH CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Affected products (2)

Vendor	Product	Platform	Versions
Linux	Linux	—	548e1f2bac1d4df91a6138f26bb4ab00323fd948 < 607a1d4c42f649e6197567c0448fd9ebb316cd42, cfd1aa3e2b71f3327cb373c45a897c9028c62b35 < 1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e, 83b375c6efef69b1066ad2d79601221e7892745a < 0b809199ff87c44487e516a725dd4be2185712ce, bfd17b6138df0122a95989457d8e18ce0b86165e < 2181a09ba980f142650fb053666350ead4471cfe …
Linux	Linux	—	6.18, 0 < 6.18, 5.10.260 ≤ 5.10., 5.15.211 ≤ 5.15. …

CVSS scores (1)

Score	Severity	Version	Source	Vector
7.8	HIGH	3.1	cna	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

References (9)