n the Linux kernel, the following vulnerability has been resolved: iommu/s390: Fix memory corruption when using identity domain zpci_get_iommu_ctrs() returns counter information to be reported as part of device statistics; these counters are stored as part of the s390_domain. The problem, however, is that the identity domain is not backed by an s390_domain and so the conversion via to_s390_domain() yields a bad address that is zero'd initially and read on-demand later via a sysfs read. These counters aren't necessary for the identity domain; just return NULL in this case. This issue was discovered via KASAN with reports that look like: BUG: KASAN: global-out-of-bounds in zpci_fmb_enable_device when using the identity domain for a device on s390.
Configuration 1 (hide)
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27 Jan 2026, 19:54
| Type | Values Removed | Values Added |
|---|---|---|
| First Time |
Linux linux Kernel
Linux |
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| CWE | CWE-787 | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| CPE | cpe:2.3:o:linux:linux_kernel:6.17:rc2:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc6:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc4:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc3:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc1:*:*:*:*:*:* cpe:2.3:o:linux:linux_kernel:6.17:rc5:*:*:*:*:*:* |
|
| References | () https://git.kernel.org/stable/c/17a58caf3863163c4a84a218a9649be2c8061443 - Patch | |
| References | () https://git.kernel.org/stable/c/b3506e9bcc777ed6af2ab631c86a9990ed97b474 - Patch |
04 Oct 2025, 08:15
| Type | Values Removed | Values Added |
|---|---|---|
| New CVE |
Published : 2025-10-04 08:15
Updated : 2026-01-27 19:54
NVD link : CVE-2025-39939
Mitre link : CVE-2025-39939
CVE.ORG link : CVE-2025-39939
JSON object : View
Out-of-bounds Write