CVE-2026-74548 (GCVE-0-2026-74548)

Vulnerability from cvelistv5 – Published: 2026-08-15 12:27 – Updated: 2026-08-19 16:38
VLAI
Title
forcedeth: fix UAF of txrx_stats in nv_remove
Summary
In the Linux kernel, the following vulnerability has been resolved: forcedeth: fix UAF of txrx_stats in nv_remove nv_remove() frees the per-CPU txrx_stats before unregister_netdev(). Until unregister completes, ndo_get_stats64, the NAPI/xmit data path, and nv_close()/drain may still access txrx_stats, leading to a use-after-free. Free the stats only after unregister_netdev().
Severity
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9 (git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < 7c22b4ee0bd003cecfc14ca28981cb213e201f70 (git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc (git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < cf2dcde2284562ff87830ca0b7fa2b06e95aef1e (git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < c9d24a205fd508b9999fcab6aca4c590490a12cf (git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < ae20a8a4de06a289d40b0a0633d8d573f1fcb049 (git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < 201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1 (git)
Affected: f4b633b911fd3b4cbe1dc065e8fb064078d0889d , < 22666ba1420164753d7b0f5a841986b25ace5435 (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.3
Unaffected: 0 , < 5.3 (semver)
Unaffected: 5.10.265 , ≤ 5.10.* (semver)
Unaffected: 5.15.216 , ≤ 5.15.* (semver)
Unaffected: 6.1.183 , ≤ 6.1.* (semver)
Unaffected: 6.6.151 , ≤ 6.6.* (semver)
Unaffected: 6.12.103 , ≤ 6.12.* (semver)
Unaffected: 6.18.44 , ≤ 6.18.* (semver)
Unaffected: 7.1.8 , ≤ 7.1.* (semver)
Unaffected: 7.2 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/nvidia/forcedeth.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            },
            {
              "lessThan": "7c22b4ee0bd003cecfc14ca28981cb213e201f70",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            },
            {
              "lessThan": "d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            },
            {
              "lessThan": "cf2dcde2284562ff87830ca0b7fa2b06e95aef1e",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            },
            {
              "lessThan": "c9d24a205fd508b9999fcab6aca4c590490a12cf",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            },
            {
              "lessThan": "ae20a8a4de06a289d40b0a0633d8d573f1fcb049",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            },
            {
              "lessThan": "201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            },
            {
              "lessThan": "22666ba1420164753d7b0f5a841986b25ace5435",
              "status": "affected",
              "version": "f4b633b911fd3b4cbe1dc065e8fb064078d0889d",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/ethernet/nvidia/forcedeth.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.3"
            },
            {
              "lessThan": "5.3",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.265",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.216",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.183",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.151",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.103",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.44",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.1.*",
              "status": "unaffected",
              "version": "7.1.8",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.10.265",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.216",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.183",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.151",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.103",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.44",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1.8",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2",
                  "versionStartIncluding": "5.3",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nforcedeth: fix UAF of txrx_stats in nv_remove\n\nnv_remove() frees the per-CPU txrx_stats before unregister_netdev().\nUntil unregister completes, ndo_get_stats64, the NAPI/xmit data path,\nand nv_close()/drain may still access txrx_stats, leading to a\nuse-after-free.\n\nFree the stats only after unregister_netdev()."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:L - The UAF is opened in nv_remove() during local PCI/driver teardown (sysfs unbind, module unload, or hot-unplug); although NAPI/xmit and stats readers can run concurrently on still-registered netdev traffic, there is no standalone remote path into nv_remove itself.\nAC:L - Once teardown starts, unregister_netdev() deterministically calls nv_close()\u2192nv_drain_tx(), which increments freed txrx_stats when TX skbs remain, and an attacker can also drive the race by timing unbind against stats polling or packet I/O they control.\nPR:L - Privileged teardown opens the window, but unprivileged peers can supply the concurrent netdev access (rtnetlink/sysfs stats via nv_get_stats64, and RX/TX on the still-up interface) that performs the UAF; per CNA driver-removal UAF precedent and the higher-severity tiebreak, PR:L.\nUI:N - No separate victim action is required beyond routine driver removal or module unload on a live interface; monitoring daemons and network traffic can hit the freed stats automatically during the unregister window without user cooperation.\nS:U - Impact is kernel heap corruption and crash/privilege escalation within the host kernel security authority; it does not cross VM, hypervisor, IOMMU, or container sandbox boundaries.\nC:H - The bug is a kmalloc-backed per-CPU UAF: nv_get_stats64 reads freed nv_txrx_stats counters via per_cpu_ptr(), and once the slab is reallocated an attacker can obtain arbitrary kernel memory disclosure.\nI:H - Freed txrx_stats are updated from NAPI/xmit and nv_drain_tx() via __this_cpu_inc/add on attacker-influenced traffic, enabling heap grooming and controlled writes through the dangling per-CPU pointer for code execution.\nA:H - Use-after-free dereferences of txrx_stats during netdev teardown reliably cause kernel oops/panic (as in the fix description), and even unsuccessful exploitation still crashes the system when concurrent RX/TX or drain paths touch freed memory."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-19T16:38:39.684Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9"
        },
        {
          "url": "https://git.kernel.org/stable/c/7c22b4ee0bd003cecfc14ca28981cb213e201f70"
        },
        {
          "url": "https://git.kernel.org/stable/c/d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc"
        },
        {
          "url": "https://git.kernel.org/stable/c/cf2dcde2284562ff87830ca0b7fa2b06e95aef1e"
        },
        {
          "url": "https://git.kernel.org/stable/c/c9d24a205fd508b9999fcab6aca4c590490a12cf"
        },
        {
          "url": "https://git.kernel.org/stable/c/ae20a8a4de06a289d40b0a0633d8d573f1fcb049"
        },
        {
          "url": "https://git.kernel.org/stable/c/201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1"
        },
        {
          "url": "https://git.kernel.org/stable/c/22666ba1420164753d7b0f5a841986b25ace5435"
        }
      ],
      "title": "forcedeth: fix UAF of txrx_stats in nv_remove",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-74548",
    "datePublished": "2026-08-15T12:27:56.387Z",
    "dateReserved": "2026-08-15T05:44:03.915Z",
    "dateUpdated": "2026-08-19T16:38:39.684Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-74548",
      "date": "2026-08-29",
      "epss": "0.00126",
      "percentile": "0.02529"
    },
    "microsoft_vex": {
      "current_release_date": "2026-08-23T14:45:23.000Z",
      "cve": "CVE-2026-74548",
      "id": "msrc_CVE-2026-74548",
      "initial_release_date": "2026-08-23T14:45:23.000Z",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "forcedeth: fix UAF of txrx_stats in nv_remove",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-74548.json",
      "version": "1"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-74548\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2026-08-15T13:18:00.170\",\"lastModified\":\"2026-08-19T17:21:09.690\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nforcedeth: fix UAF of txrx_stats in nv_remove\\n\\nnv_remove() frees the per-CPU txrx_stats before unregister_netdev().\\nUntil unregister completes, ndo_get_stats64, the NAPI/xmit data path,\\nand nv_close()/drain may still access txrx_stats, leading to a\\nuse-after-free.\\n\\nFree the stats only after unregister_netdev().\"}],\"affected\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"affectedData\":[{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"unaffected\",\"programFiles\":[\"drivers/net/ethernet/nvidia/forcedeth.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"7c22b4ee0bd003cecfc14ca28981cb213e201f70\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"cf2dcde2284562ff87830ca0b7fa2b06e95aef1e\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"c9d24a205fd508b9999fcab6aca4c590490a12cf\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"ae20a8a4de06a289d40b0a0633d8d573f1fcb049\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1\",\"versionType\":\"git\",\"status\":\"affected\"},{\"version\":\"f4b633b911fd3b4cbe1dc065e8fb064078d0889d\",\"lessThan\":\"22666ba1420164753d7b0f5a841986b25ace5435\",\"versionType\":\"git\",\"status\":\"affected\"}]},{\"vendor\":\"Linux\",\"product\":\"Linux\",\"defaultStatus\":\"affected\",\"programFiles\":[\"drivers/net/ethernet/nvidia/forcedeth.c\"],\"repo\":\"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\",\"versions\":[{\"version\":\"5.3\",\"status\":\"affected\"},{\"version\":\"0\",\"lessThan\":\"5.3\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.10.265\",\"lessThanOrEqual\":\"5.10.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"5.15.216\",\"lessThanOrEqual\":\"5.15.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.1.183\",\"lessThanOrEqual\":\"6.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.6.151\",\"lessThanOrEqual\":\"6.6.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.12.103\",\"lessThanOrEqual\":\"6.12.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"6.18.44\",\"lessThanOrEqual\":\"6.18.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.1.8\",\"lessThanOrEqual\":\"7.1.*\",\"versionType\":\"semver\",\"status\":\"unaffected\"},{\"version\":\"7.2\",\"lessThanOrEqual\":\"*\",\"versionType\":\"original_commit_for_fix\",\"status\":\"unaffected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":7.8,\"baseSeverity\":\"HIGH\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":1.8,\"impactScore\":5.9}]},\"references\":[{\"url\":\"https://git.kernel.org/stable/c/201e05aa531eba0dfe2ee05b4e178f6ffa12c8b1\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/22666ba1420164753d7b0f5a841986b25ace5435\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/7c22b4ee0bd003cecfc14ca28981cb213e201f70\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/ae20a8a4de06a289d40b0a0633d8d573f1fcb049\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/c9d24a205fd508b9999fcab6aca4c590490a12cf\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cdf864d5d3c813ae1876f2bacc1cf3ac3c66dfc9\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/cf2dcde2284562ff87830ca0b7fa2b06e95aef1e\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/d51ce7a63b76eda02cabfed1b0cc277b2f5c9bcc\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-08-21T11:33:26+00:00",
      "cve": "CVE-2026-74548",
      "id": "CVE-2026-74548",
      "initial_release_date": "2026-08-15T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: forcedeth: fix UAF of txrx_stats in nv_remove",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-74548.json",
      "version": "3"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





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.

Sightings

Author Source Type Date Other

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.