Answer in brief
CVE-2026-45915 records a Medium severity (CVSS 5.5) vulnerability in fat: avoid parent link count underflow in rmdir. 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-2026-45915 records a Medium severity (CVSS 5.5) vulnerability in fat: avoid parent link count underflow in rmdir. 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 5.5. 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 | >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <7fe0de287e931e07cb96ecf1f449b2ebdb0e1115 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <9894c79fd9466612d0514be157b5c30cd93aa645 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <cd569b87378b9c33ae13c23d6bb9d205d66f7c4b || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <d3b7ffa90f613938128432c7b2f35b7aa4bdd86b || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <955c5d670b5ae07c78f4345e23a895638db96ce1 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <17866f8a0822d414cb02e621cf003a7d04396ef8 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <8cafcb881364af5ef3a8b9fed4db254054033d8a | 7fe0de287e931e07cb96ecf1f449b2ebdb0e1115, 9894c79fd9466612d0514be157b5c30cd93aa645, cd569b87378b9c33ae13c23d6bb9d205d66f7c4b, d3b7ffa90f613938128432c7b2f35b7aa4bdd86b, 955c5d670b5ae07c78f4345e23a895638db96ce1, 17866f8a0822d414cb02e621cf003a7d04396ef8, d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0, 8cafcb881364af5ef3a8b9fed4db254054033d8a |
| Linux/Linuxgeneric | 2.6.19 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 24, 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: fat: avoid parent link count underflow in rmdir Corrupted FAT images can leave a directory inode with an incorrect i_nlink (e.g. 2 even though subdirectories exist). rmdir then unconditionally calls drop_nlink(dir) and can drive i_nlink to 0, triggering the WARN_ON in drop_nlink(). Add a sanity check in vfat_rmdir() and msdos_rmdir(): only drop the parent link count when it is at least 3, otherwise report a filesystem error.
Quoted source text, attributed separately from HOL analysis.
CVSS is 5.5. 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 | >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <7fe0de287e931e07cb96ecf1f449b2ebdb0e1115 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <9894c79fd9466612d0514be157b5c30cd93aa645 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <cd569b87378b9c33ae13c23d6bb9d205d66f7c4b || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <d3b7ffa90f613938128432c7b2f35b7aa4bdd86b || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <955c5d670b5ae07c78f4345e23a895638db96ce1 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <17866f8a0822d414cb02e621cf003a7d04396ef8 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0 || >=9a53c3a783c2fa9b969628e65695c11c3e51e673 <8cafcb881364af5ef3a8b9fed4db254054033d8a | 7fe0de287e931e07cb96ecf1f449b2ebdb0e1115, 9894c79fd9466612d0514be157b5c30cd93aa645, cd569b87378b9c33ae13c23d6bb9d205d66f7c4b, d3b7ffa90f613938128432c7b2f35b7aa4bdd86b, 955c5d670b5ae07c78f4345e23a895638db96ce1, 17866f8a0822d414cb02e621cf003a7d04396ef8, d0bb592fa9def2bace90ac8926c0a1d6fa8c1aa0, 8cafcb881364af5ef3a8b9fed4db254054033d8a |
| Linux/Linuxgeneric | 2.6.19 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 24, 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: fat: avoid parent link count underflow in rmdir Corrupted FAT images can leave a directory inode with an incorrect i_nlink (e.g. 2 even though subdirectories exist). rmdir then unconditionally calls drop_nlink(dir) and can drive i_nlink to 0, triggering the WARN_ON in drop_nlink(). Add a sanity check in vfat_rmdir() and msdos_rmdir(): only drop the parent link count when it is at least 3, otherwise report a filesystem error.
Quoted source text, attributed separately from HOL analysis.