CVE-2026-46249 (GCVE-0-2026-46249)

Vulnerability from cvelistv5 – Published: 2026-06-03 15:49 – Updated: 2026-06-03 15:49
VLAI
Title
octeontx2-af: Fix PF driver crash with kexec kernel booting
Summary
In the Linux kernel, the following vulnerability has been resolved: octeontx2-af: Fix PF driver crash with kexec kernel booting During a kexec reboot the hardware is not power-cycled, so AF state from the old kernel can persist into the new kernel. When AF and PF drivers are built as modules, the PF driver may probe before AF reinitializes the hardware. The PF driver treats the RVUM block revision as an indication that AF initialization is complete. If this value is left uncleared at shutdown, PF may incorrectly assume AF is ready and access stale hardware state, leading to a crash. Clear the RVUM block revision during AF shutdown to avoid PF mis-detecting AF readiness after kexec.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < b7605b9301abc18fbbf2b0e23fdd281fc768955d (git)
Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < 9769a09afda20a006b528b9e723effcae45965b2 (git)
Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < 57821d1436ba1c6a6973aa32d54166fdec35558c (git)
Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < 8b5ed7c5417b7013d35b6f2507dab739013ba1a9 (git)
Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < 7d56ba306e93d04696718963fb4cda2883ee7585 (git)
Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < 9c3398e5b3a914b74276d44ab54c49123b89c61a (git)
Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < 1370736836a18b5e0cd74bcc9cffe11d21f1fe79 (git)
Affected: 54494aa5d1e68945dc79feb7c8461cd382e11d8a , < 2d2d574309e3ae84ee794869a5da8b4c38753a94 (git)
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Linux Linux Affected: 4.20
Unaffected: 0 , < 4.20 (semver)
Unaffected: 5.10.252 , ≤ 5.10.* (semver)
Unaffected: 5.15.202 , ≤ 5.15.* (semver)
Unaffected: 6.1.165 , ≤ 6.1.* (semver)
Unaffected: 6.6.128 , ≤ 6.6.* (semver)
Unaffected: 6.12.75 , ≤ 6.12.* (semver)
Unaffected: 6.18.14 , ≤ 6.18.* (semver)
Unaffected: 6.19.4 , ≤ 6.19.* (semver)
Unaffected: 7.0 , ≤ * (original_commit_for_fix)
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{
  "containers": {
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        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/marvell/octeontx2/af/rvu.c"
          ],
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          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
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              "status": "affected",
              "version": "4.20"
            },
            {
              "lessThan": "4.20",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.252",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.202",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.165",
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            {
              "lessThanOrEqual": "6.6.*",
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              "version": "6.6.128",
              "versionType": "semver"
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            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.75",
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            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.14",
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            {
              "lessThanOrEqual": "6.19.*",
              "status": "unaffected",
              "version": "6.19.4",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.0",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
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                  "versionStartIncluding": "4.20",
                  "vulnerable": true
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              "negate": false,
              "operator": "OR"
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      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nocteontx2-af: Fix PF driver crash with kexec kernel booting\n\nDuring a kexec reboot the hardware is not power-cycled, so AF state from\nthe old kernel can persist into the new kernel. When AF and PF drivers\nare built as modules, the PF driver may probe before AF reinitializes\nthe hardware.\n\nThe PF driver treats the RVUM block revision as an indication that AF\ninitialization is complete. If this value is left uncleared at shutdown,\nPF may incorrectly assume AF is ready and access stale hardware state,\nleading to a crash.\n\nClear the RVUM block revision during AF shutdown to avoid PF\nmis-detecting AF readiness after kexec."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-03T15:49:45.252Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d"
        },
        {
          "url": "https://git.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2"
        },
        {
          "url": "https://git.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c"
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          "url": "https://git.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9"
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        },
        {
          "url": "https://git.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94"
        }
      ],
      "title": "octeontx2-af: Fix PF driver crash with kexec kernel booting",
      "x_generator": {
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  "cveMetadata": {
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    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46249",
    "datePublished": "2026-06-03T15:49:45.252Z",
    "dateReserved": "2026-05-13T15:03:33.107Z",
    "dateUpdated": "2026-06-03T15:49:45.252Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-46249\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-06-03T18:16:25.237\",\"lastModified\":\"2026-06-03T18:16:25.237\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nocteontx2-af: Fix PF driver crash with kexec kernel booting\\n\\nDuring a kexec reboot the hardware is not power-cycled, so AF state from\\nthe old kernel can persist into the new kernel. When AF and PF drivers\\nare built as modules, the PF driver may probe before AF reinitializes\\nthe hardware.\\n\\nThe PF driver treats the RVUM block revision as an indication that AF\\ninitialization is complete. If this value is left uncleared at shutdown,\\nPF may incorrectly assume AF is ready and access stale hardware state,\\nleading to a crash.\\n\\nClear the RVUM block revision during AF shutdown to avoid PF\\nmis-detecting AF readiness after kexec.\"}],\"metrics\":{},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/1370736836a18b5e0cd74bcc9cffe11d21f1fe79\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/2d2d574309e3ae84ee794869a5da8b4c38753a94\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/57821d1436ba1c6a6973aa32d54166fdec35558c\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7d56ba306e93d04696718963fb4cda2883ee7585\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/8b5ed7c5417b7013d35b6f2507dab739013ba1a9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9769a09afda20a006b528b9e723effcae45965b2\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/9c3398e5b3a914b74276d44ab54c49123b89c61a\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/b7605b9301abc18fbbf2b0e23fdd281fc768955d\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
  }
}


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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.