Answer in brief
CVE-2026-64074 records a Unknown severity vulnerability in fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap. 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 | >=37c4a9590e1efcae7749682239fc22a330d2d325 <e37ea2c6f17f273813ea4e8e94c102591d598ce1 || >=37c4a9590e1efcae7749682239fc22a330d2d325 <93614949dc86f068e3c32c32cf1ee2a2323177a7 || >=37c4a9590e1efcae7749682239fc22a330d2d325 <a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78 | e37ea2c6f17f273813ea4e8e94c102591d598ce1, 93614949dc86f068e3c32c32cf1ee2a2323177a7, a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78 |
| Linux/Linuxgeneric | 6.15 | 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: fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap statmount_mnt_idmap() writes one mapping with seq_printf() and then manually advances seq->count to include the NUL separator. If seq_printf() overflows, seq_set_overflow() sets seq->count to seq->size. The manual seq->count++ changes this to seq->size + 1. seq_has_overflowed() then no longer detects the overflow. The corrupted count returns to statmount_string(), which later executes: seq->buf[seq->count++] = '\0'; This causes a 1-byte NULL out-of-bounds write on the dynamically allocated seq buffer. Fix this by checking for overflow immediately after seq_printf().
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-64074 records a Unknown severity vulnerability in fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap. 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 | >=37c4a9590e1efcae7749682239fc22a330d2d325 <e37ea2c6f17f273813ea4e8e94c102591d598ce1 || >=37c4a9590e1efcae7749682239fc22a330d2d325 <93614949dc86f068e3c32c32cf1ee2a2323177a7 || >=37c4a9590e1efcae7749682239fc22a330d2d325 <a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78 | e37ea2c6f17f273813ea4e8e94c102591d598ce1, 93614949dc86f068e3c32c32cf1ee2a2323177a7, a3bf0f28d4ba16e1f35f8c983bb04426b87e2a78 |
| Linux/Linuxgeneric | 6.15 | 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: fs/statmount: fix slab out-of-bounds write in statmount_mnt_idmap statmount_mnt_idmap() writes one mapping with seq_printf() and then manually advances seq->count to include the NUL separator. If seq_printf() overflows, seq_set_overflow() sets seq->count to seq->size. The manual seq->count++ changes this to seq->size + 1. seq_has_overflowed() then no longer detects the overflow. The corrupted count returns to statmount_string(), which later executes: seq->buf[seq->count++] = '\0'; This causes a 1-byte NULL out-of-bounds write on the dynamically allocated seq buffer. Fix this by checking for overflow immediately after seq_printf().
Quoted source text, attributed separately from HOL analysis.