Vulnetix
Try Vulnetix Request Demo
CVE-2025-39939 PUBLISHED CVSS 7.800000190734863 HIGH

In 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.

EPSS 0.02% · 5.7th percentile

Risk Scores

CVSS v3.1
7.800000190734863
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS Score
0.02%
5.7th percentile

Affected Products

VendorProductVersions
LinuxLinux64af12c6ec3afd7d44bc8b2044eee59f98059087, 64af12c6ec3afd7d44bc8b2044eee59f98059087, 6.15
linuxlinux_kernel6.15, 6.15, 6.15

Timeline

References

Open in Interactive Console →