iommu/amd/iommu_v2: Fix pasid_state refcount dec hit 0 warning on pasid unbind (Linux Linux)
At a glance
- Source
- NVD
- EPSS
- EPSS 0.15 % · percentile 4 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- Linux
- NVD status
- Analyzed
Description
In the Linux kernel, the following vulnerability has been resolved: iommu/amd/iommu_v2: Fix pasid_state refcount dec hit 0 warning on pasid unbind When unbinding pasid - a race condition exists vs outstanding page faults. To prevent this, the pasid_state object contains a refcount. * set to 1 on pasid bind * incremented on each ppr notification start * decremented on each ppr notification done * decremented on pasid unbind Since refcount_dec assumes that refcount will never reach 0: the current implementation causes the following to be invoked on pasid unbind: REFCOUNT_WARN("decrement hit 0; leaking memory") Fix this issue by changing refcount_dec to refcount_dec_and_test to explicitly handle refcount=1.
References
- https://git.kernel.org/stable/c/a50d60b8f2aff46dd7c7edb4a5835cdc4d432c22
- https://git.kernel.org/stable/c/13ed255248dfbbb7f23f9170c7a537fb9ca22c73
- https://git.kernel.org/stable/c/9ccc51be3126b25cfe9351dbffde946c925cc28a
- https://git.kernel.org/stable/c/98d86bf32187db27946ca817c2467a5f2f7aa02f
- https://git.kernel.org/stable/c/534103bcd52ca9c1fecbc70e717b4a538dc4ded8
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 4.7 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H | NVD · nvd@nist.gov (Primary) |
European references
- ENISA EUVD · EUVD-2025-32777
- GCVE · GCVE-0-2023-53501
CERT-FR advisories
- CERTFR-2025-AVI-1032 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-1009 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0921 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
- CERTFR-2025-AVI-0895 — Multiples vulnérabilités dans le noyau Linux de SUSE · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.15 < 5.15.132cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 5.16 < 6.1.53cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.2 < 6.4.16cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*≥ 6.5 < 6.5.3
Affected products
| Product | Versions |
|---|---|
| Linux · Linux | affected 8bc54824da4e8fcf0ed679cf09ac32f23d83254a < a50d60b8f2aff46dd7c7edb4a5835cdc4d432c22 ; affected 8bc54824da4e8fcf0ed679cf09ac32f23d83254a < 13ed255248dfbbb7f23f9170c7a537fb9ca22c73 ; affected 8bc54824da4e8fcf0ed679cf09ac32f23d83254a < 9ccc51be3126b25cfe9351dbffde946c925cc28a ; affected 8bc54824da4e8fcf0ed679cf09ac32f23d83254a < 98d86bf32187db27946ca817c2467a5f2f7aa02f ; affected 8bc54824da4e8fcf0ed679cf09ac32f23d83254a < 534103bcd52ca9c1fecbc70e717b4a538dc4ded8 |
| Linux · Linux | affected 5.15 ; unaffected 0 < 5.15 ; unaffected 5.15.132 ≤ 5.15.* ; unaffected 6.1.53 ≤ 6.1.* ; unaffected 6.4.16 ≤ 6.4.* ; unaffected 6.5.3 ≤ 6.5.* |
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 |