CVE-2026-89742Medium· 5.5▾ SunlitA flaw was found in the Linux kernel. A local user could exploit a use-after-free vulnerability in the `dma_req_free()` function within the RapidIO mport character device interface. This flaw occurs when the `dma_req_free()` function attem…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 30.3 · likelihood 0 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 12.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.2%
— → 6.4
none → medium
— → 6.4
none → medium
— → 7.8
none → high
7.8 → 6.4
high → medium
Last analysed / modified upstream
7.8 → 5.5
high → medium
A flaw was found in the Linux kernel. A local user could exploit a use-after-free vulnerability in the dma_req_free() function within the RapidIO mport character device interface. This flaw occurs when the dma_req_free() function attempts to dereference a freed object after dropping the last reference to a mapping. Successful exploitation of this vulnerability could lead to arbitrary code execution or a denial of service.
kernel: rapidio: mport_cdev: fix use-after-free in dma_req_free() — rated Moderate by Red Hat. Released 2026-09-11, updated 2026-09-21.
Not affected:
Refer to the advisory for fix availability.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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