Answer in brief
CVE-2026-53026 records a High severity (CVSS 7.5) vulnerability in NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg. 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.
CVSS is 7.5. 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 | >=c07dc84ed67c5a182273171639bacbbb87c12175 <4584229395d0d65bd517780afe97ffea07cb2c3d || >=8072e34e1387d03102b788677d491e2bcceef6f5 <b81572b073441dfd32213e41857676d0dbff4665 || >=8072e34e1387d03102b788677d491e2bcceef6f5 <b48f44f36e6607b2f818560f19deb86b4a9c717b || >=6.18.4 <6.18.33 | 4584229395d0d65bd517780afe97ffea07cb2c3d, b81572b073441dfd32213e41857676d0dbff4665, b48f44f36e6607b2f818560f19deb86b4a9c717b, 6.18.33 |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count since that was already done by the thread that added READ access to the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed. When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on __kmem_cache_shutdown. This problem can be reproduced by running the Git project's test suite over NFS.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-53026 records a High severity (CVSS 7.5) vulnerability in NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg. 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.
CVSS is 7.5. 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 | >=c07dc84ed67c5a182273171639bacbbb87c12175 <4584229395d0d65bd517780afe97ffea07cb2c3d || >=8072e34e1387d03102b788677d491e2bcceef6f5 <b81572b073441dfd32213e41857676d0dbff4665 || >=8072e34e1387d03102b788677d491e2bcceef6f5 <b48f44f36e6607b2f818560f19deb86b4a9c717b || >=6.18.4 <6.18.33 | 4584229395d0d65bd517780afe97ffea07cb2c3d, b81572b073441dfd32213e41857676d0dbff4665, b48f44f36e6607b2f818560f19deb86b4a9c717b, 6.18.33 |
| Linux/Linuxgeneric | 6.19 | Not reported |
Published upstream
Jun 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 5, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 24, 2026
In the Linux kernel, the following vulnerability has been resolved: NFSD: fix nfs4_file access extra count in nfsd4_add_rdaccess_to_wrdeleg In nfsd4_add_rdaccess_to_wrdeleg, if fp->fi_fds[O_RDONLY] is already set by another thread, __nfs4_file_get_access should not be called to increment the nfs4_file access count since that was already done by the thread that added READ access to the file. The extra fi_access count in nfs4_file can prevent the corresponding nfsd_file from being freed. When stopping nfs-server service, these extra access counts trigger a BUG in kmem_cache_destroy() that shows nfsd_file object remaining on __kmem_cache_shutdown. This problem can be reproduced by running the Git project's test suite over NFS.
Quoted source text, attributed separately from HOL analysis.