Vulnerability-Lookup

CVE-2026-52982 (GCVE-0-2026-52982)

Vulnerability from cvelistv5 – Published: 2026-06-24 16:28 – Updated: 2026-06-24 16:28

Title

net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()

Summary

In the Linux kernel, the following vulnerability has been resolved: net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit() syzbot reported a KASAN slab-use-after-free read in rtl8150_start_xmit() when accessing skb->len for tx statistics after usb_submit_urb() has been called: BUG: KASAN: slab-use-after-free in rtl8150_start_xmit+0x71f/0x760 drivers/net/usb/rtl8150.c:712 Read of size 4 at addr ffff88810eb7a930 by task kworker/0:4/5226 The URB completion handler write_bulk_callback() frees the skb via dev_kfree_skb_irq(dev->tx_skb). The URB may complete on another CPU in softirq context before usb_submit_urb() returns in the submitter, so by the time the submitter reads skb->len the skb has already been queued to the per-CPU completion_queue and freed by net_tx_action(): CPU A (xmit) CPU B (USB completion softirq) ------------ ------------------------------ dev->tx_skb = skb; usb_submit_urb() --+ |-------> write_bulk_callback() | dev_kfree_skb_irq(dev->tx_skb) | net_tx_action() | napi_skb_cache_put() <-- free netdev->stats.tx_bytes | += skb->len; <-- UAF read Fix it by caching skb->len before submitting the URB and using the cached value when updating the tx_bytes counter. The pre-existing tx_bytes semantics are preserved: the counter tracks the original frame length (skb->len), not the ETH_ZLEN/USB-alignment padded "count" value that is handed to the device. Changing that would be a user-visible accounting change and is out of scope for this UAF fix.

Severity

No CVSS data available.

Assigner

Linux

References

8 references

URL	Tags
https://git.kernel.org/stable/c/5af290c86fa81ddbc…
https://git.kernel.org/stable/c/24831b0b2ada9fef1…
https://git.kernel.org/stable/c/423b5b86e14e190f6…
https://git.kernel.org/stable/c/5db090ca07b28a63f…
https://git.kernel.org/stable/c/30cf9829d09ca9582…
https://git.kernel.org/stable/c/6999d70e0eda39af0…
https://git.kernel.org/stable/c/4dd7eb94f79486b77…
https://git.kernel.org/stable/c/23f0e34c64acba15c…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5af290c86fa81ddbc86a08d54229af5daa40c6a4 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 24831b0b2ada9fef18d1f486b7b7c444ee5ba637 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 423b5b86e14e190f6e3161eb5f2ea5f908295ba7 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 5db090ca07b28a63fb1499690cf19a3f3adafacb (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 30cf9829d09ca958279c937af8e35495cd2f1e09 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 6999d70e0eda39af029fa1891c48f0a8832b09d5 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 4dd7eb94f79486b77ca6b4c8676aedbc465dc802 (git) Affected: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 , < 23f0e34c64acba15cad4d23e50f41f533da195fa (git)
Linux	Linux	Affected: 2.6.12 Unaffected: 0 , < 2.6.12 (semver) Unaffected: 5.10.258 , ≤ 5.10.* (semver) Unaffected: 5.15.209 , ≤ 5.15.* (semver) Unaffected: 6.1.175 , ≤ 6.1.* (semver) Unaffected: 6.6.141 , ≤ 6.6.* (semver) Unaffected: 6.12.91 , ≤ 6.12.* (semver) Unaffected: 6.18.33 , ≤ 6.18.* (semver) Unaffected: 7.0.10 , ≤ 7.0.* (semver) Unaffected: 7.1 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/rtl8150.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "5af290c86fa81ddbc86a08d54229af5daa40c6a4",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "24831b0b2ada9fef18d1f486b7b7c444ee5ba637",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "423b5b86e14e190f6e3161eb5f2ea5f908295ba7",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "5db090ca07b28a63fb1499690cf19a3f3adafacb",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "30cf9829d09ca958279c937af8e35495cd2f1e09",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "6999d70e0eda39af029fa1891c48f0a8832b09d5",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "4dd7eb94f79486b77ca6b4c8676aedbc465dc802",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            },
            {
              "lessThan": "23f0e34c64acba15cad4d23e50f41f533da195fa",
              "status": "affected",
              "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/net/usb/rtl8150.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.12"
            },
            {
              "lessThan": "2.6.12",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.258",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.209",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.175",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.141",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.91",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.33",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.0.*",
              "status": "unaffected",
              "version": "7.0.10",
              "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": "5.10.258",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "5.15.209",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.175",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.141",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.91",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.33",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.10",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "2.6.12",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()\n\nsyzbot reported a KASAN slab-use-after-free read in rtl8150_start_xmit()\nwhen accessing skb-\u003elen for tx statistics after usb_submit_urb() has\nbeen called:\n\n  BUG: KASAN: slab-use-after-free in rtl8150_start_xmit+0x71f/0x760\n    drivers/net/usb/rtl8150.c:712\n  Read of size 4 at addr ffff88810eb7a930 by task kworker/0:4/5226\n\nThe URB completion handler write_bulk_callback() frees the skb via\ndev_kfree_skb_irq(dev-\u003etx_skb). The URB may complete on another CPU\nin softirq context before usb_submit_urb() returns in the submitter,\nso by the time the submitter reads skb-\u003elen the skb has already been\nqueued to the per-CPU completion_queue and freed by net_tx_action():\n\n  CPU A (xmit)                      CPU B (USB completion softirq)\n  ------------                      ------------------------------\n  dev-\u003etx_skb = skb;\n  usb_submit_urb()      --+\n                          |-------\u003e write_bulk_callback()\n                          |           dev_kfree_skb_irq(dev-\u003etx_skb)\n                          |         net_tx_action()\n                          |           napi_skb_cache_put()   \u003c-- free\n  netdev-\u003estats.tx_bytes  |\n    += skb-\u003elen;          \u003c-- UAF read\n\nFix it by caching skb-\u003elen before submitting the URB and using the\ncached value when updating the tx_bytes counter.\n\nThe pre-existing tx_bytes semantics are preserved: the counter tracks\nthe original frame length (skb-\u003elen), not the ETH_ZLEN/USB-alignment\npadded \"count\" value that is handed to the device.  Changing that\nwould be a user-visible accounting change and is out of scope for\nthis UAF fix."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-06-24T16:28:57.763Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/5af290c86fa81ddbc86a08d54229af5daa40c6a4"
        },
        {
          "url": "https://git.kernel.org/stable/c/24831b0b2ada9fef18d1f486b7b7c444ee5ba637"
        },
        {
          "url": "https://git.kernel.org/stable/c/423b5b86e14e190f6e3161eb5f2ea5f908295ba7"
        },
        {
          "url": "https://git.kernel.org/stable/c/5db090ca07b28a63fb1499690cf19a3f3adafacb"
        },
        {
          "url": "https://git.kernel.org/stable/c/30cf9829d09ca958279c937af8e35495cd2f1e09"
        },
        {
          "url": "https://git.kernel.org/stable/c/6999d70e0eda39af029fa1891c48f0a8832b09d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/4dd7eb94f79486b77ca6b4c8676aedbc465dc802"
        },
        {
          "url": "https://git.kernel.org/stable/c/23f0e34c64acba15cad4d23e50f41f533da195fa"
        }
      ],
      "title": "net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-52982",
    "datePublished": "2026-06-24T16:28:57.763Z",
    "dateReserved": "2026-06-09T07:44:35.376Z",
    "dateUpdated": "2026-06-24T16:28:57.763Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

GHSA-PJM2-H6FG-MFW7

Vulnerability from github – Published: 2026-06-24 18:32 – Updated: 2026-06-24 18:32

Details

In the Linux kernel, the following vulnerability has been resolved:

net: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()

syzbot reported a KASAN slab-use-after-free read in rtl8150_start_xmit() when accessing skb->len for tx statistics after usb_submit_urb() has been called:

BUG: KASAN: slab-use-after-free in rtl8150_start_xmit+0x71f/0x760 drivers/net/usb/rtl8150.c:712 Read of size 4 at addr ffff88810eb7a930 by task kworker/0:4/5226

The URB completion handler write_bulk_callback() frees the skb via dev_kfree_skb_irq(dev->tx_skb). The URB may complete on another CPU in softirq context before usb_submit_urb() returns in the submitter, so by the time the submitter reads skb->len the skb has already been queued to the per-CPU completion_queue and freed by net_tx_action():

CPU A (xmit) CPU B (USB completion softirq) ------------ ------------------------------ dev->tx_skb = skb; usb_submit_urb() --+ |-------> write_bulk_callback() | dev_kfree_skb_irq(dev->tx_skb) | net_tx_action() | napi_skb_cache_put() <-- free netdev->stats.tx_bytes | += skb->len; <-- UAF read

Fix it by caching skb->len before submitting the URB and using the cached value when updating the tx_bytes counter.

The pre-existing tx_bytes semantics are preserved: the counter tracks the original frame length (skb->len), not the ETH_ZLEN/USB-alignment padded "count" value that is handed to the device. Changing that would be a user-visible accounting change and is out of scope for this UAF fix.

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-52982"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-06-24T17:17:08Z",
    "severity": null
  },
  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet: usb: rtl8150: fix use-after-free in rtl8150_start_xmit()\n\nsyzbot reported a KASAN slab-use-after-free read in rtl8150_start_xmit()\nwhen accessing skb-\u003elen for tx statistics after usb_submit_urb() has\nbeen called:\n\n  BUG: KASAN: slab-use-after-free in rtl8150_start_xmit+0x71f/0x760\n    drivers/net/usb/rtl8150.c:712\n  Read of size 4 at addr ffff88810eb7a930 by task kworker/0:4/5226\n\nThe URB completion handler write_bulk_callback() frees the skb via\ndev_kfree_skb_irq(dev-\u003etx_skb). The URB may complete on another CPU\nin softirq context before usb_submit_urb() returns in the submitter,\nso by the time the submitter reads skb-\u003elen the skb has already been\nqueued to the per-CPU completion_queue and freed by net_tx_action():\n\n  CPU A (xmit)                      CPU B (USB completion softirq)\n  ------------                      ------------------------------\n  dev-\u003etx_skb = skb;\n  usb_submit_urb()      --+\n                          |-------\u003e write_bulk_callback()\n                          |           dev_kfree_skb_irq(dev-\u003etx_skb)\n                          |         net_tx_action()\n                          |           napi_skb_cache_put()   \u003c-- free\n  netdev-\u003estats.tx_bytes  |\n    += skb-\u003elen;          \u003c-- UAF read\n\nFix it by caching skb-\u003elen before submitting the URB and using the\ncached value when updating the tx_bytes counter.\n\nThe pre-existing tx_bytes semantics are preserved: the counter tracks\nthe original frame length (skb-\u003elen), not the ETH_ZLEN/USB-alignment\npadded \"count\" value that is handed to the device.  Changing that\nwould be a user-visible accounting change and is out of scope for\nthis UAF fix.",
  "id": "GHSA-pjm2-h6fg-mfw7",
  "modified": "2026-06-24T18:32:42Z",
  "published": "2026-06-24T18:32:42Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52982"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/23f0e34c64acba15cad4d23e50f41f533da195fa"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/24831b0b2ada9fef18d1f486b7b7c444ee5ba637"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/30cf9829d09ca958279c937af8e35495cd2f1e09"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/423b5b86e14e190f6e3161eb5f2ea5f908295ba7"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/4dd7eb94f79486b77ca6b4c8676aedbc465dc802"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5af290c86fa81ddbc86a08d54229af5daa40c6a4"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/5db090ca07b28a63fb1499690cf19a3f3adafacb"
    },
    {
      "type": "WEB",
      "url": "https://git.kernel.org/stable/c/6999d70e0eda39af029fa1891c48f0a8832b09d5"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

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.

Action not permitted

CVE-2026-52982 (GCVE-0-2026-52982)

GHSA-PJM2-H6FG-MFW7

Tags

Sightings

Nomenclature