Answer in brief
CVE-2026-45991 records a High severity (CVSS 7.8) vulnerability in udf: fix partition descriptor append bookkeeping. 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-2026-45991 records a High severity (CVSS 7.8) vulnerability in udf: fix partition descriptor append bookkeeping. 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 7.8. 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 | >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <ad3c0c4400686f6f37b382aaa48fac2b9aefccbe || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <68013a9bd4c01acd42073715f00e1a1992f089ee || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <e8474cfbac9ada2cdaa4eaedec22aadfa0f58559 || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <058b451b1039f056d1362c4fec2229e522366ab0 || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <b5597bb83fc37b5b5da74a4453fa920b932cf39a || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <08fa5d818e5bf53c7ca234d88ba334f32004e9b6 || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <08841b06fa64d8edbd1a21ca6e613420c90cc4b8 || 7f401f160a9c7a1ff84ba3cb9b2f636d1f5cfb6b || >=4.18.7 <4.19 | ad3c0c4400686f6f37b382aaa48fac2b9aefccbe, 68013a9bd4c01acd42073715f00e1a1992f089ee, e8474cfbac9ada2cdaa4eaedec22aadfa0f58559, 058b451b1039f056d1362c4fec2229e522366ab0, b5597bb83fc37b5b5da74a4453fa920b932cf39a, 08fa5d818e5bf53c7ca234d88ba334f32004e9b6, 08841b06fa64d8edbd1a21ca6e613420c90cc4b8, 4.19 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
May 27, 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 19, 2026
In the Linux kernel, the following vulnerability has been resolved: udf: fix partition descriptor append bookkeeping Mounting a crafted UDF image with repeated partition descriptors can trigger a heap out-of-bounds write in part_descs_loc[]. handle_partition_descriptor() deduplicates entries by partition number, but appended slots never record partnum. As a result duplicate Partition Descriptors are appended repeatedly and num_part_descs keeps growing. Once the table is full, the growth path still sizes the allocation from partnum even though inserts are indexed by num_part_descs. If partnum is already aligned to PART_DESC_ALLOC_STEP, ALIGN(partnum, step) can keep the old capacity and the next append writes past the end of the table. Store partnum in the appended slot and size growth from the next append count so deduplication and capacity tracking follow the same model.
Quoted source text, attributed separately from HOL analysis.
CVSS is 7.8. 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 | >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <ad3c0c4400686f6f37b382aaa48fac2b9aefccbe || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <68013a9bd4c01acd42073715f00e1a1992f089ee || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <e8474cfbac9ada2cdaa4eaedec22aadfa0f58559 || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <058b451b1039f056d1362c4fec2229e522366ab0 || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <b5597bb83fc37b5b5da74a4453fa920b932cf39a || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <08fa5d818e5bf53c7ca234d88ba334f32004e9b6 || >=ee4af50ca94f58afc3532662779b9cf80bbe27c8 <08841b06fa64d8edbd1a21ca6e613420c90cc4b8 || 7f401f160a9c7a1ff84ba3cb9b2f636d1f5cfb6b || >=4.18.7 <4.19 | ad3c0c4400686f6f37b382aaa48fac2b9aefccbe, 68013a9bd4c01acd42073715f00e1a1992f089ee, e8474cfbac9ada2cdaa4eaedec22aadfa0f58559, 058b451b1039f056d1362c4fec2229e522366ab0, b5597bb83fc37b5b5da74a4453fa920b932cf39a, 08fa5d818e5bf53c7ca234d88ba334f32004e9b6, 08841b06fa64d8edbd1a21ca6e613420c90cc4b8, 4.19 |
| Linux/Linuxgeneric | 4.19 | Not reported |
Published upstream
May 27, 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 19, 2026
In the Linux kernel, the following vulnerability has been resolved: udf: fix partition descriptor append bookkeeping Mounting a crafted UDF image with repeated partition descriptors can trigger a heap out-of-bounds write in part_descs_loc[]. handle_partition_descriptor() deduplicates entries by partition number, but appended slots never record partnum. As a result duplicate Partition Descriptors are appended repeatedly and num_part_descs keeps growing. Once the table is full, the growth path still sizes the allocation from partnum even though inserts are indexed by num_part_descs. If partnum is already aligned to PART_DESC_ALLOC_STEP, ALIGN(partnum, step) can keep the old capacity and the next append writes past the end of the table. Store partnum in the appended slot and size growth from the next append count so deduplication and capacity tracking follow the same model.
Quoted source text, attributed separately from HOL analysis.