CVE-2026-89742
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
rapidio: mport_cdev: fix use-after-free in dma_req_free()
In the Linux kernel, the following vulnerability has been resolved: rapidio: mport_cdev: fix use-after-free in dma_req_free() dma_req_free() acquires buf_mutex through req->map, drops the mapping reference with kref_put(), and then dereferences req->map again to unlock the mutex. If kref_put() drops the last reference, mport_release_mapping() frees the mapping, and the subsequent mutex_unlock() dereferences a freed object. This is a use-after-free. Fix this by caching map and md before kref_put(), clearing req->map while holding buf_mutex, and using the cached md for mutex unlocking. The bug is reachable from userspace via the RapidIO mport character device interface.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | 00c5ed913b0dc563fbeb8a97ea8916c03bbbbf6a | Unavailable | None listed |
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | fc79c07cdcde02c5b17633d78777de6ac2c14b29 | Unavailable | None listed |
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | 26ccfe7d69e27b0d933ae0a64a23a0cb9b9a85a6 | Unavailable | None listed |
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | bd8881c24a9520f9c3d3e855d866197f63e471a7 | Unavailable | None listed |
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | 9a9929ec875ff20922c90c96fd544ae8a2a61a8d | Unavailable | None listed |
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | e6e925cc1f8067c65c7bec3da50a0ead3b3ef4e0 | Unavailable | None listed |
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | 211c68d817a3d9dc14c0026a59da7cac30f8147e | Unavailable | None listed |
| e8de370188d098bb49483c287b44925957c3c9b6 | affected | git | 5cbef379a94b161726c5f504598bf4791d45cedc | Unavailable | None listed |
Linux
- Vendor
- Linux
- Product
- Linux
- Platforms
- Unknown
- Default status
affected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 4.6 | affected | Unavailable | Unavailable | Unavailable | None listed |
| 0 | unaffected | semver | 4.6 | Unavailable | None listed |
| 5.10.270 | unaffected | semver | Unavailable | 5.10.* | None listed |
| 5.15.221 | unaffected | semver | Unavailable | 5.15.* | None listed |
| 6.1.188 | unaffected | semver | Unavailable | 6.1.* | None listed |
| 6.6.157 | unaffected | semver | Unavailable | 6.6.* | None listed |
| 6.12.109 | unaffected | semver | Unavailable | 6.12.* | None listed |
| 6.18.50 | unaffected | semver | Unavailable | 6.18.* | None listed |
| 7.2.4 | unaffected | semver | Unavailable | 7.2.* | None listed |
| 7.3 | unaffected | original_commit_for_fix | Unavailable | * | None listed |