mm: khugepaged: skip huge page collapse for special files (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.21 % · percentile 11 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved: mm: khugepaged: skip huge page collapse for special files The read-only THP for filesystems will collapse THP for files opened readonly and mapped with VM_EXEC. The intended usecase is to avoid TLB misses for large text segments. But it doesn't restrict the file types so a THP could be collapsed for a non-regular file, for example, block device, if it is opened readonly and mapped with EXEC permission. This may cause bugs, like [1] and [2]. This is definitely not the intended usecase, so just collapse THP for regular files in order to close the attack surface. [shy828301@gmail.com: fix vm_file check [3]]
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 5.5 | CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2021-34495
- GCVE · GCVE-0-2021-47491
CERT-FR advisories
- CERTFR-2026-AVI-1165 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0088 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0072 — Multiples vulnérabilités dans Juniper Secure Analytics · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0958 — Multiples vulnérabilités dans les produits IBM · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0668 — Multiples vulnérabilités dans le noyau Linux de Red Hat · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0526 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2024-AVI-0496 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.4 < 5.10.78cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.11 < 5.14.16cpe:2.3:o:linux:linux_kernel:5.15:rc1:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.15:rc2:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.15:rc3:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.15:rc4:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.15:rc5:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.15:rc6:*:*:*:*:*:*cpe:2.3:o:linux:linux_kernel:5.15:rc7:*:*:*:*:*:*
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 99cb0dbd47a15d395bf3faa78dc122bc5efe3fc0 < 6d67b2a73b8e3a079c355bab3c1aef7d85a044b8 ; affected 99cb0dbd47a15d395bf3faa78dc122bc5efe3fc0 < 5fcb6fce74ffa614d964667110cf1a516c48c6d9 ; affected 99cb0dbd47a15d395bf3faa78dc122bc5efe3fc0 < a4aeaa06d45e90f9b279f0b09de84bd00006e733 |
| Linux · Linux | affected 5.4 ; unaffected 0 < 5.4 ; unaffected 5.10.78 ≤ 5.10.* ; unaffected 5.14.16 ≤ 5.14.* ; unaffected 5.15 ≤ * |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |