Answer in brief
CVE-2026-53381 records a Unknown severity vulnerability in virtiofs: fix UAF on submount umount. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
Answer in brief
CVE-2026-53381 records a Unknown severity vulnerability in virtiofs: fix UAF on submount umount. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=548e1f2bac1d4df91a6138f26bb4ab00323fd948 <607a1d4c42f649e6197567c0448fd9ebb316cd42 || >=cfd1aa3e2b71f3327cb373c45a897c9028c62b35 <1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e || >=83b375c6efef69b1066ad2d79601221e7892745a <0b809199ff87c44487e516a725dd4be2185712ce || >=bfd17b6138df0122a95989457d8e18ce0b86165e <2181a09ba980f142650fb053666350ead4471cfe || >=b26923512dbe57ae4917bafd31396d22a9d1691a <97c4691653d145dcc699eca5d3aba3219a520f1f || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9 || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <39a2b95e008665c14f84e50ed411d898df7cd11b || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <e09412a714bcd49375198427bb4aa005037a9d6f || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <06b41351779e9289e8785694ade9042ae85e41ea || f19a1390af448d9e193c08e28ea5f727bf3c3049 || >=5.10.246 <5.10.260 || >=5.15.196 <5.15.211 || >=6.1.158 <6.1.177 || >=6.6.115 <6.6.144 || >=6.12.54 <6.12.95 || >=6.17.4 <6.18 | 607a1d4c42f649e6197567c0448fd9ebb316cd42, 1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e, 0b809199ff87c44487e516a725dd4be2185712ce, 2181a09ba980f142650fb053666350ead4471cfe, 97c4691653d145dcc699eca5d3aba3219a520f1f, 2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9, 39a2b95e008665c14f84e50ed411d898df7cd11b, e09412a714bcd49375198427bb4aa005037a9d6f, 06b41351779e9289e8785694ade9042ae85e41ea, 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18 |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.
A CVSS score is not reported in the current record. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Linux/Linuxgeneric | >=548e1f2bac1d4df91a6138f26bb4ab00323fd948 <607a1d4c42f649e6197567c0448fd9ebb316cd42 || >=cfd1aa3e2b71f3327cb373c45a897c9028c62b35 <1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e || >=83b375c6efef69b1066ad2d79601221e7892745a <0b809199ff87c44487e516a725dd4be2185712ce || >=bfd17b6138df0122a95989457d8e18ce0b86165e <2181a09ba980f142650fb053666350ead4471cfe || >=b26923512dbe57ae4917bafd31396d22a9d1691a <97c4691653d145dcc699eca5d3aba3219a520f1f || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9 || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <39a2b95e008665c14f84e50ed411d898df7cd11b || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <e09412a714bcd49375198427bb4aa005037a9d6f || >=26e5c67deb2e1f42a951f022fdf5b9f7eb747b01 <06b41351779e9289e8785694ade9042ae85e41ea || f19a1390af448d9e193c08e28ea5f727bf3c3049 || >=5.10.246 <5.10.260 || >=5.15.196 <5.15.211 || >=6.1.158 <6.1.177 || >=6.6.115 <6.6.144 || >=6.12.54 <6.12.95 || >=6.17.4 <6.18 | 607a1d4c42f649e6197567c0448fd9ebb316cd42, 1cc0e3a0c6499aaaa2f21a4fcbba388486afb25e, 0b809199ff87c44487e516a725dd4be2185712ce, 2181a09ba980f142650fb053666350ead4471cfe, 97c4691653d145dcc699eca5d3aba3219a520f1f, 2abfd3ffbd9452f72535d96ff3982b3ab1f8f2f9, 39a2b95e008665c14f84e50ed411d898df7cd11b, e09412a714bcd49375198427bb4aa005037a9d6f, 06b41351779e9289e8785694ade9042ae85e41ea, 5.10.260, 5.15.211, 6.1.177, 6.6.144, 6.12.95, 6.18 |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
Jul 19, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 5, 2026
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.
Quoted source text, attributed separately from HOL analysis.