CVE-2026-98003 (GCVE-0-2026-98003)

Vulnerability from cvelistv5 – Published: 2026-09-25 10:23 – Updated: 2026-09-25 10:23
VLAI
Title
iommu/amd: Do not reallocate GA log buffers on resume
Summary
In the Linux kernel, the following vulnerability has been resolved: iommu/amd: Do not reallocate GA log buffers on resume Commit c5e1a1eb9279 ("iommu/amd: Simplify and Consolidate Virtual APIC (AVIC) Enablement") moved the GA log allocation from iommu_init_pci() to enable_iommus_vapic(), which is called on every resume. iommu_init_ga_log() assigns iommu->ga_log and iommu->ga_log_tail unconditionally. Each resume therefore replaces the boot-time pointers and leaks both old allocations. The function also uses GFP_KERNEL from a syscore resume callback, where interrupts are disabled and the non-boot CPUs are offline. Return early if both buffers are already allocated. Clear the pointers in free_ga_log() so a partial allocation failure cannot leave ga_log dangling.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b , < 94458b80d3b203c1c9e2c98aa7319b7713e006c0 (git)
Affected: c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b , < b6be275d19cee01f8f1f08a2ff18337103d05d40 (git)
Affected: c5e1a1eb9279fdb28d47ca2a4493a4c53b7d6a0b , < 00a7dd64888d6dd72110b40e2824a088cf7b7386 (git)
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Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.18.53 , ≤ 6.18.* (semver)
Unaffected: 7.2.7 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc3 , ≤ * (original_commit_for_fix)
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommu/amd: Do not reallocate GA log buffers on resume\n\nCommit c5e1a1eb9279 (\"iommu/amd: Simplify and Consolidate Virtual APIC\n(AVIC) Enablement\") moved the GA log allocation from iommu_init_pci()\nto enable_iommus_vapic(), which is called on every resume.\n\niommu_init_ga_log() assigns iommu-\u003ega_log and iommu-\u003ega_log_tail\nunconditionally. Each resume therefore replaces the boot-time pointers\nand leaks both old allocations. The function also uses GFP_KERNEL from a\nsyscore resume callback, where interrupts are disabled and the non-boot\nCPUs are offline.\n\nReturn early if both buffers are already allocated. Clear the pointers\nin free_ga_log() so a partial allocation failure cannot leave ga_log\ndangling."
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}



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