Answer in brief
CVE-2026-46195 records a Critical severity (CVSS 9.8) vulnerability in smb: client: validate dacloffset before building DACL pointers. 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-2026-46195 records a Critical severity (CVSS 9.8) vulnerability in smb: client: validate dacloffset before building DACL pointers. 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 9.8. 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 | >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <5de2665e913a10ad70aaeecf736b97276e83d995 || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <f9dc3be8f403c1216df73e57221f44b045e7ee0b || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <ba7f71b6161c0943dafc367565e5843d16b7d505 || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <3b1ddba19e77ee35241cd27f16dc3e8d14e08db7 || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <c688f3ed73d31943334ad2139cb02ec49664322a || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <8bd07e417b6bda67e317920584e48cb6ee442a8a || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <f98b48151cc502ada59d9778f0112d21f2586ca3 | 5de2665e913a10ad70aaeecf736b97276e83d995, f9dc3be8f403c1216df73e57221f44b045e7ee0b, ba7f71b6161c0943dafc367565e5843d16b7d505, 3b1ddba19e77ee35241cd27f16dc3e8d14e08db7, c688f3ed73d31943334ad2139cb02ec49664322a, 8bd07e417b6bda67e317920584e48cb6ee442a8a, f98b48151cc502ada59d9778f0112d21f2586ca3 |
| Linux/Linuxgeneric | 5.12 | Not reported |
Published upstream
May 28, 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: smb: client: validate dacloffset before building DACL pointers parse_sec_desc(), build_sec_desc(), and the chown path in id_mode_to_cifs_acl() all add the server-supplied dacloffset to pntsd before proving a DACL header fits inside the returned security descriptor. On 32-bit builds a malicious server can return dacloffset near U32_MAX, wrap the derived DACL pointer below end_of_acl, and then slip past the later pointer-based bounds checks. build_sec_desc() and id_mode_to_cifs_acl() can then dereference DACL fields from the wrapped pointer in the chmod/chown rewrite paths. Validate dacloffset numerically before building any DACL pointer and reuse the same helper at the three DACL entry points.
Quoted source text, attributed separately from HOL analysis.
CVSS is 9.8. 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 | >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <5de2665e913a10ad70aaeecf736b97276e83d995 || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <f9dc3be8f403c1216df73e57221f44b045e7ee0b || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <ba7f71b6161c0943dafc367565e5843d16b7d505 || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <3b1ddba19e77ee35241cd27f16dc3e8d14e08db7 || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <c688f3ed73d31943334ad2139cb02ec49664322a || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <8bd07e417b6bda67e317920584e48cb6ee442a8a || >=bc3e9dd9d104ca1b75644eab87b38ce8a924aef4 <f98b48151cc502ada59d9778f0112d21f2586ca3 | 5de2665e913a10ad70aaeecf736b97276e83d995, f9dc3be8f403c1216df73e57221f44b045e7ee0b, ba7f71b6161c0943dafc367565e5843d16b7d505, 3b1ddba19e77ee35241cd27f16dc3e8d14e08db7, c688f3ed73d31943334ad2139cb02ec49664322a, 8bd07e417b6bda67e317920584e48cb6ee442a8a, f98b48151cc502ada59d9778f0112d21f2586ca3 |
| Linux/Linuxgeneric | 5.12 | Not reported |
Published upstream
May 28, 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: smb: client: validate dacloffset before building DACL pointers parse_sec_desc(), build_sec_desc(), and the chown path in id_mode_to_cifs_acl() all add the server-supplied dacloffset to pntsd before proving a DACL header fits inside the returned security descriptor. On 32-bit builds a malicious server can return dacloffset near U32_MAX, wrap the derived DACL pointer below end_of_acl, and then slip past the later pointer-based bounds checks. build_sec_desc() and id_mode_to_cifs_acl() can then dereference DACL fields from the wrapped pointer in the chmod/chown rewrite paths. Validate dacloffset numerically before building any DACL pointer and reuse the same helper at the three DACL entry points.
Quoted source text, attributed separately from HOL analysis.