Answer in brief
CVE-2026-45927 records a Medium severity (CVSS 4.7) vulnerability in bpf: Require frozen map for calculating map hash. 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 4.7. 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 | >=ea2e6467ac36bf3d785defc89e58269b15d182f7 <7752d36343862323bbeea4ce3adf0ec2ed86e122 || >=ea2e6467ac36bf3d785defc89e58269b15d182f7 <f415e114b58fe02c41191e47f24bdabb438daf72 || >=ea2e6467ac36bf3d785defc89e58269b15d182f7 <a2c86aa621c22f2a7e26c654f936d65cfff0aa91 | 7752d36343862323bbeea4ce3adf0ec2ed86e122, f415e114b58fe02c41191e47f24bdabb438daf72, a2c86aa621c22f2a7e26c654f936d65cfff0aa91 |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Require frozen map for calculating map hash Currently, bpf_map_get_info_by_fd calculates and caches the hash of the map regardless of the map's frozen state. This leads to a TOCTOU bug where userspace can call BPF_OBJ_GET_INFO_BY_FD to cache the hash and then modify the map contents before freezing. Therefore, a trusted loader can be tricked into verifying the stale hash while loading the modified contents. Fix this by returning -EPERM if the map is not frozen when the hash is requested. This ensures the hash is only generated for the final, immutable state of the map.
Quoted source text, attributed separately from HOL analysis.
Answer in brief
CVE-2026-45927 records a Medium severity (CVSS 4.7) vulnerability in bpf: Require frozen map for calculating map hash. 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 4.7. 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 | >=ea2e6467ac36bf3d785defc89e58269b15d182f7 <7752d36343862323bbeea4ce3adf0ec2ed86e122 || >=ea2e6467ac36bf3d785defc89e58269b15d182f7 <f415e114b58fe02c41191e47f24bdabb438daf72 || >=ea2e6467ac36bf3d785defc89e58269b15d182f7 <a2c86aa621c22f2a7e26c654f936d65cfff0aa91 | 7752d36343862323bbeea4ce3adf0ec2ed86e122, f415e114b58fe02c41191e47f24bdabb438daf72, a2c86aa621c22f2a7e26c654f936d65cfff0aa91 |
| Linux/Linuxgeneric | 6.18 | Not reported |
Published upstream
May 27, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Jun 25, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Jun 25, 2026
In the Linux kernel, the following vulnerability has been resolved: bpf: Require frozen map for calculating map hash Currently, bpf_map_get_info_by_fd calculates and caches the hash of the map regardless of the map's frozen state. This leads to a TOCTOU bug where userspace can call BPF_OBJ_GET_INFO_BY_FD to cache the hash and then modify the map contents before freezing. Therefore, a trusted loader can be tricked into verifying the stale hash while loading the modified contents. Fix this by returning -EPERM if the map is not frozen when the hash is requested. This ensures the hash is only generated for the final, immutable state of the map.
Quoted source text, attributed separately from HOL analysis.