CVE-2026-46059 (GCVE-0-2026-46059)
Vulnerability from cvelistv5
Published
2026-05-27 12:57
Modified
2026-06-14 17:51
Severity ?
Summary
In the Linux kernel, the following vulnerability has been resolved: KVM: nSVM: Always use NextRIP as vmcb02's NextRIP after first L2 VMRUN For guests with NRIPS disabled, L1 does not provide NextRIP when running an L2 with an injected soft interrupt, instead it advances the current RIP before running it. KVM uses the current RIP as the NextRIP in vmcb02 to emulate a CPU without NRIPS. However, after L2 runs the first time, NextRIP will be updated by the CPU and/or KVM, and the current RIP is no longer the correct value to use in vmcb02. Hence, after save/restore, use the current RIP if and only if a nested run is pending, otherwise use NextRIP. Give soft_int_next_rip the same treatment, as it's the same logic, just for a narrower use case. [sean: give soft_int_next_rip the same treatment]
References
Impacted products
Vendor Product Version
Linux Linux Version: cc440cdad5b7a4c1de12dace725209eb3e0cf663
Version: cc440cdad5b7a4c1de12dace725209eb3e0cf663
Version: cc440cdad5b7a4c1de12dace725209eb3e0cf663
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/svm/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "3428ed1529a1af4cce5aff6c5bd2fcc39ad726bb",
              "status": "affected",
              "version": "cc440cdad5b7a4c1de12dace725209eb3e0cf663",
              "versionType": "git"
            },
            {
              "lessThan": "69fe1411a5ce678b4da6489b5d2282b4e1d13acf",
              "status": "affected",
              "version": "cc440cdad5b7a4c1de12dace725209eb3e0cf663",
              "versionType": "git"
            },
            {
              "lessThan": "8d397582f6b5e9fbcf09781c7c934b4910e94a50",
              "status": "affected",
              "version": "cc440cdad5b7a4c1de12dace725209eb3e0cf663",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/x86/kvm/svm/nested.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.8"
            },
            {
              "lessThan": "5.8",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.27",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.4",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "5.8",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nKVM: nSVM: Always use NextRIP as vmcb02\u0027s NextRIP after first L2 VMRUN\n\nFor guests with NRIPS disabled, L1 does not provide NextRIP when running\nan L2 with an injected soft interrupt, instead it advances the current RIP\nbefore running it. KVM uses the current RIP as the NextRIP in vmcb02 to\nemulate a CPU without NRIPS.\n\nHowever, after L2 runs the first time, NextRIP will be updated by the CPU\nand/or KVM, and the current RIP is no longer the correct value to use in\nvmcb02.  Hence, after save/restore, use the current RIP if and only if a\nnested run is pending, otherwise use NextRIP.  Give soft_int_next_rip the\nsame treatment, as it\u0027s the same logic, just for a narrower use case.\n\n[sean: give soft_int_next_rip the same treatment]"
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-14T17:51:19.172Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/3428ed1529a1af4cce5aff6c5bd2fcc39ad726bb"
        },
        {
          "url": "https://git.kernel.org/stable/c/69fe1411a5ce678b4da6489b5d2282b4e1d13acf"
        },
        {
          "url": "https://git.kernel.org/stable/c/8d397582f6b5e9fbcf09781c7c934b4910e94a50"
        }
      ],
      "title": "KVM: nSVM: Always use NextRIP as vmcb02\u0027s NextRIP after first L2 VMRUN",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46059",
    "datePublished": "2026-05-27T12:57:19.928Z",
    "dateReserved": "2026-05-13T15:03:33.095Z",
    "dateUpdated": "2026-06-14T17:51:19.172Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}


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