Answer in brief
CVE-2026-72217 records a Unknown severity vulnerability in SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing. 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 | >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <4a1148f2739d5089c3ca8ae2e9d1053e219ab5df || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <6029e711a818bf34d6c4b90cafee24f3afffa110 || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <69e18135e2a004a79505451dbef07314ea16e1eb || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <98414b42530af65cb984ffc12685096a3b5e179a || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <42f5b80dda6b86e424054baf1475df686c403d5c | 4a1148f2739d5089c3ca8ae2e9d1053e219ab5df, 6029e711a818bf34d6c4b90cafee24f3afffa110, 69e18135e2a004a79505451dbef07314ea16e1eb, 98414b42530af65cb984ffc12685096a3b5e179a, 42f5b80dda6b86e424054baf1475df686c403d5c |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing xdr_buf_to_bvec() writes a bio_vec into the caller's array before testing whether that slot is in range, and the head branch performs the store with no check at all. When the caller's budget is exactly used up, the next store lands one element past the end of the array. The overflow label returns count - 1, which masks the surplus store but cannot undo it. rq_bvec, the array passed by nfsd_vfs_write(), is allocated to exactly rq_maxpages entries with no slack. The OOB store can land in adjacent slab memory; the bv_len and bv_offset fields written there are derived from client-supplied RPC payload sizes. Move the in-range check ahead of the store in the head, page-loop, and tail branches. With the check at the top of each sequence, count is incremented only after a successful store, so the overflow label can return count directly.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-72217 records a Unknown severity vulnerability in SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing. 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 | >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <4a1148f2739d5089c3ca8ae2e9d1053e219ab5df || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <6029e711a818bf34d6c4b90cafee24f3afffa110 || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <69e18135e2a004a79505451dbef07314ea16e1eb || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <98414b42530af65cb984ffc12685096a3b5e179a || >=2eb2b93581813b74c7174961126f6ec38eadb5a7 <42f5b80dda6b86e424054baf1475df686c403d5c | 4a1148f2739d5089c3ca8ae2e9d1053e219ab5df, 6029e711a818bf34d6c4b90cafee24f3afffa110, 69e18135e2a004a79505451dbef07314ea16e1eb, 98414b42530af65cb984ffc12685096a3b5e179a, 42f5b80dda6b86e424054baf1475df686c403d5c |
| Linux/Linuxgeneric | 6.6 | Not reported |
Published upstream
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 15, 2026
In the Linux kernel, the following vulnerability has been resolved: SUNRPC: Bound-check xdr_buf_to_bvec() stores before writing xdr_buf_to_bvec() writes a bio_vec into the caller's array before testing whether that slot is in range, and the head branch performs the store with no check at all. When the caller's budget is exactly used up, the next store lands one element past the end of the array. The overflow label returns count - 1, which masks the surplus store but cannot undo it. rq_bvec, the array passed by nfsd_vfs_write(), is allocated to exactly rq_maxpages entries with no slack. The OOB store can land in adjacent slab memory; the bv_len and bv_offset fields written there are derived from client-supplied RPC payload sizes. Move the in-range check ahead of the store in the head, page-loop, and tail branches. With the check at the top of each sequence, count is incremented only after a successful store, so the overflow label can return count directly.
Quoted source text, attributed separately from HOL analysis.