Answer in brief
CVE-2026-89652 records a Critical severity (CVSS 9.8) 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), 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), 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 |
| Linux/Linuxgeneric | >=19913b4eac4a230dccb548931358398f45dabe4c <a294064e0e0f81ea607b2f019e16888aa1b0a011 || >=19913b4eac4a230dccb548931358398f45dabe4c <61d9f27b191b838b96b697ce0bfaee39a138243a || >=19913b4eac4a230dccb548931358398f45dabe4c <06fb5e623cdc2402d6bb29be94d9beb9a826ffec || >=19913b4eac4a230dccb548931358398f45dabe4c <e7c2fd3893a7f7fcd7e8cf0b2c6348bb1e893df6 || >=19913b4eac4a230dccb548931358398f45dabe4c <eff8013c5a8916613c742ae5a2cc341cb605c0ae | a294064e0e0f81ea607b2f019e16888aa1b0a011, 61d9f27b191b838b96b697ce0bfaee39a138243a, 06fb5e623cdc2402d6bb29be94d9beb9a826ffec, e7c2fd3893a7f7fcd7e8cf0b2c6348bb1e893df6, eff8013c5a8916613c742ae5a2cc341cb605c0ae |
Published upstream
Sep 11, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 19, 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.