CVE-2026-89742

Katalog CVE

CVSS 7.8 · High EPSS 0,16%

Skor CVSS 3.1 7.8 (High) menurut CNA.

Deskripsi (NVD)

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.

Rincian

Terbit di NVD

11 September 2026

Terakhir diubah

14 September 2026

Status NVD

Received

CVSS 3.1

7.8 (High), sumber CNA
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H · uraikan di kalkulator

EPSS (30 hari)

0,16% peluang dieksploitasi; lebih tinggi dari 5,1% CVE lain

Produk dan versi terdampak

NVD belum mencantumkan data produk (CPE) untuk CVE ini. Produk yang terdampak biasanya disebut di deskripsi dan di advisory vendor pada daftar referensi.

Referensi dan perbaikan

• https://git.kernel.org/stable/c/00c5ed913b0dc563fbeb8a97ea8916c03bbbbf6a
• https://git.kernel.org/stable/c/211c68d817a3d9dc14c0026a59da7cac30f8147e
• https://git.kernel.org/stable/c/26ccfe7d69e27b0d933ae0a64a23a0cb9b9a85a6
• https://git.kernel.org/stable/c/5cbef379a94b161726c5f504598bf4791d45cedc
• https://git.kernel.org/stable/c/9a9929ec875ff20922c90c96fd544ae8a2a61a8d
• https://git.kernel.org/stable/c/bd8881c24a9520f9c3d3e855d866197f63e471a7
• https://git.kernel.org/stable/c/e6e925cc1f8067c65c7bec3da50a0ead3b3ef4e0
• https://git.kernel.org/stable/c/fc79c07cdcde02c5b17633d78777de6ac2c14b29