Answer in brief
CVE-2026-89652 records a Unknown severity vulnerability in ceph: bound copied dentry name length in NFS export get_name. 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 | >=19913b4eac4a230dccb548931358398f45dabe4c <61d9f27b191b838b96b697ce0bfaee39a138243a || >=19913b4eac4a230dccb548931358398f45dabe4c <06fb5e623cdc2402d6bb29be94d9beb9a826ffec || >=19913b4eac4a230dccb548931358398f45dabe4c <e7c2fd3893a7f7fcd7e8cf0b2c6348bb1e893df6 || >=19913b4eac4a230dccb548931358398f45dabe4c <eff8013c5a8916613c742ae5a2cc341cb605c0ae | 61d9f27b191b838b96b697ce0bfaee39a138243a, 06fb5e623cdc2402d6bb29be94d9beb9a826ffec, e7c2fd3893a7f7fcd7e8cf0b2c6348bb1e893df6, eff8013c5a8916613c742ae5a2cc341cb605c0ae |
| Linux/Linuxgeneric | 3.15 | Not reported |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Sep 11, 2026
In the Linux kernel, the following vulnerability has been resolved: ceph: bound copied dentry name length in NFS export get_name ceph_get_name() copies the MDS-supplied name into the caller's NAME_MAX-sized buffer with memcpy(name, rinfo->dname, rinfo->dname_len) and then writes name[rinfo->dname_len] = 0, without checking dname_len against NAME_MAX. A malicious or buggy MDS that returns a LOOKUPNAME reply with dname_len > NAME_MAX overflows the buffer. __get_snap_name() copies rde->name / rde->name_len the same unchecked way. Impact: a malicious or compromised Ceph MDS overflows the NAME_MAX name buffer in a client's NFS-export get_name path, a slab out-of-bounds write reported by KASAN. Reachable when a CephFS mount is re-exported over NFS. Add ceph_export_copy_name(), which rejects lengths above NAME_MAX with -ENAMETOOLONG before the copy, and use it in both ceph_get_name() and __get_snap_name().
Quoted source text, attributed separately from HOL analysis.