CVE-2025-39939 (GCVE-0-2025-39939)

Vulnerability from cvelistv5 – Published: 2025-10-04 07:31 – Updated: 2025-10-04 07:31
VLAI?
Summary
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.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 64af12c6ec3afd7d44bc8b2044eee59f98059087 , < 17a58caf3863163c4a84a218a9649be2c8061443 (git)
Affected: 64af12c6ec3afd7d44bc8b2044eee59f98059087 , < b3506e9bcc777ed6af2ab631c86a9990ed97b474 (git)
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    Linux Linux Affected: 6.15
Unaffected: 0 , < 6.15 (semver)
Unaffected: 6.16.9 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)
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      "providerMetadata": {
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    "dateReserved": "2025-04-16T07:20:57.148Z",
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}


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