CVE-2026-46011 (GCVE-0-2026-46011)

Vulnerability from cvelistv5 – Published: 2026-05-27 12:56 – Updated: 2026-08-05 12:29
VLAI
Title
media: mtk-jpeg: fix use-after-free in release path due to uncancelled work
Summary
In the Linux kernel, the following vulnerability has been resolved: media: mtk-jpeg: fix use-after-free in release path due to uncancelled work The mtk_jpeg_release() function frees the context structure (ctx) without first cancelling any pending or running work in ctx->jpeg_work. This creates a race window where the workqueue callback may still be accessing the context memory after it has been freed. Race condition: CPU 0 (release) CPU 1 (workqueue) ---------------- ------------------ close() mtk_jpeg_release() mtk_jpegenc_worker() ctx = work->data // accessing ctx kfree(ctx) // freed! access ctx // UAF! The work is queued via queue_work() during JPEG encode/decode operations (via mtk_jpeg_device_run). If the device is closed while work is pending or running, the work handler will access freed memory. Fix this by calling cancel_work_sync() BEFORE acquiring the mutex. This ordering is critical: if cancel_work_sync() is called after mutex_lock(), and the work handler also tries to acquire the same mutex, it would cause a deadlock. Note: The open error path does NOT need cancel_work_sync() because INIT_WORK() only initializes the work structure - it does not schedule it. Work is only scheduled later during ioctl operations.
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: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 2209fdae5c2f615930c9af1379c1cfca199ec5d8 (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 0498b27a1542021d90269d58347501d4c3ccd84e (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 26506a30e0e26d612f82a7bf0e395626968a44e6 (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < e78c39f720679fcf3a2eacd82725ec3ea2648301 (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 34c519feef3e4fcff1078dc8bdb25fbbbd10303f (git)
guessed Create a notification for this product.
Linux Linux Affected: 6.2
Unaffected: 0 , < 6.2 (semver)
Unaffected: 6.6.140 , ≤ 6.6.* (semver)
Unaffected: 6.12.86 , ≤ 6.12.* (semver)
Unaffected: 6.18.27 , ≤ 6.18.* (semver)
Unaffected: 7.0.4 , ≤ 7.0.* (semver)
Unaffected: 7.1 , ≤ * (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/media/platform/mediatek/jpeg/mtk_jpeg_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "2209fdae5c2f615930c9af1379c1cfca199ec5d8",
              "status": "affected",
              "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
              "versionType": "git"
            },
            {
              "lessThan": "0498b27a1542021d90269d58347501d4c3ccd84e",
              "status": "affected",
              "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
              "versionType": "git"
            },
            {
              "lessThan": "26506a30e0e26d612f82a7bf0e395626968a44e6",
              "status": "affected",
              "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
              "versionType": "git"
            },
            {
              "lessThan": "e78c39f720679fcf3a2eacd82725ec3ea2648301",
              "status": "affected",
              "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
              "versionType": "git"
            },
            {
              "lessThan": "34c519feef3e4fcff1078dc8bdb25fbbbd10303f",
              "status": "affected",
              "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "6.2"
            },
            {
              "lessThan": "6.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.140",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.86",
              "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": "6.6.140",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.86",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.27",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.0.4",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.1",
                  "versionStartIncluding": "6.2",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mtk-jpeg: fix use-after-free in release path due to uncancelled work\n\nThe mtk_jpeg_release() function frees the context structure (ctx) without\nfirst cancelling any pending or running work in ctx-\u003ejpeg_work. This\ncreates a race window where the workqueue callback may still be accessing\nthe context memory after it has been freed.\n\nRace condition:\n\n    CPU 0 (release)                    CPU 1 (workqueue)\n    ----------------                   ------------------\n    close()\n      mtk_jpeg_release()\n                                       mtk_jpegenc_worker()\n                                         ctx = work-\u003edata\n                                         // accessing ctx\n\n        kfree(ctx)  // freed!\n                                         access ctx  // UAF!\n\nThe work is queued via queue_work() during JPEG encode/decode operations\n(via mtk_jpeg_device_run). If the device is closed while work is pending\nor running, the work handler will access freed memory.\n\nFix this by calling cancel_work_sync() BEFORE acquiring the mutex. This\nordering is critical: if cancel_work_sync() is called after mutex_lock(),\nand the work handler also tries to acquire the same mutex, it would cause\na deadlock.\n\nNote: The open error path does NOT need cancel_work_sync() because\nINIT_WORK() only initializes the work structure - it does not schedule\nit. Work is only scheduled later during ioctl operations."
        }
      ],
      "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 vulnerability is reached through the V4L2 video device node (/dev/videoN, VFL_TYPE_VIDEO) via ioctls and close(), which requires local system access rather than any network or adjacent reachability.\nAC:L - This is a use-after-free race, but the attacker controls both sides \u2014 they queue the encode/decode work via STREAMON/qbuf and then close the fd \u2014 and can retry the open/queue/close sequence indefinitely until they win, so success does not depend on conditions outside their control.\nPR:L - Triggering the path requires opening the JPEG codec video node and issuing m2m ioctls, which needs local access at unprivileged (e.g. video-group / media process) level but not real root.\nUI:N - The attacker performs the entire open, queue-work, and close sequence themselves; no victim action is required.\nS:U - The UAF corrupts kernel heap memory within the kernel\u0027s own security authority with no crossing of a VM/IOMMU/sandbox boundary.\nC:H - After ctx is freed and reclaimed, the worker dereferences attacker-influenceable freed memory (pointers, m2m context), enabling disclosure of kernel memory contents.\nI:H - The worker writes to the freed object (e.g. ctx-\u003etotal_frame_num++) and programs hardware from freed-object fields, providing a write primitive amenable to heap spraying and control-flow corruption.\nA:H - Use-after-free on the freed context reliably causes kernel oops/panic, a clear high availability impact."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-05T12:29:08.321Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/2209fdae5c2f615930c9af1379c1cfca199ec5d8"
        },
        {
          "url": "https://git.kernel.org/stable/c/0498b27a1542021d90269d58347501d4c3ccd84e"
        },
        {
          "url": "https://git.kernel.org/stable/c/26506a30e0e26d612f82a7bf0e395626968a44e6"
        },
        {
          "url": "https://git.kernel.org/stable/c/e78c39f720679fcf3a2eacd82725ec3ea2648301"
        },
        {
          "url": "https://git.kernel.org/stable/c/34c519feef3e4fcff1078dc8bdb25fbbbd10303f"
        }
      ],
      "title": "media: mtk-jpeg: fix use-after-free in release path due to uncancelled work",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-46011",
    "datePublished": "2026-05-27T12:56:13.198Z",
    "dateReserved": "2026-05-13T15:03:33.092Z",
    "dateUpdated": "2026-08-05T12:29:08.321Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-46011",
      "date": "2026-09-27",
      "epss": "0.0017",
      "percentile": "0.05679"
    },
    "microsoft_vex": {
      "current_release_date": "2026-06-09T14:48:16.000Z",
      "cve": "CVE-2026-46011",
      "id": "msrc_CVE-2026-46011",
      "initial_release_date": "2026-05-02T00:00:00.000Z",
      "product_status:fixed": "1",
      "product_status:known_affected": "1",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "media: mtk-jpeg: fix use-after-free in release path due to uncancelled work",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-46011.json",
      "version": "3"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "2209fdae5c2f615930c9af1379c1cfca199ec5d8",
                    "status": "affected",
                    "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "0498b27a1542021d90269d58347501d4c3ccd84e",
                    "status": "affected",
                    "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "26506a30e0e26d612f82a7bf0e395626968a44e6",
                    "status": "affected",
                    "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "e78c39f720679fcf3a2eacd82725ec3ea2648301",
                    "status": "affected",
                    "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "34c519feef3e4fcff1078dc8bdb25fbbbd10303f",
                    "status": "affected",
                    "version": "5fb1c2361e5630491d2a2f9359654eb022601bc0",
                    "versionType": "git"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "drivers/media/platform/mediatek/jpeg/mtk_jpeg_core.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "6.2"
                  },
                  {
                    "lessThan": "6.2",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.6.*",
                    "status": "unaffected",
                    "version": "6.6.140",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.12.*",
                    "status": "unaffected",
                    "version": "6.12.86",
                    "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"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "configurations": [
          {
            "nodes": [
              {
                "cpeMatch": [
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A1A92866-F406-43B5-B2D1-CFC274753E9D",
                    "versionEndExcluding": "6.6.140",
                    "versionStartIncluding": "6.2",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "55DA1C62-9991-451E-B8A8-E0004E00F789",
                    "versionEndExcluding": "6.12.86",
                    "versionStartIncluding": "6.7",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "A10AC84F-C058-47D5-85B4-E6E51A613B74",
                    "versionEndExcluding": "6.18.27",
                    "versionStartIncluding": "6.13",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                    "matchCriteriaId": "CDB78D6D-22C3-4154-B0D0-94AF1CE5C2E3",
                    "versionEndExcluding": "7.0.4",
                    "versionStartIncluding": "6.19",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: mtk-jpeg: fix use-after-free in release path due to uncancelled work\n\nThe mtk_jpeg_release() function frees the context structure (ctx) without\nfirst cancelling any pending or running work in ctx-\u003ejpeg_work. This\ncreates a race window where the workqueue callback may still be accessing\nthe context memory after it has been freed.\n\nRace condition:\n\n    CPU 0 (release)                    CPU 1 (workqueue)\n    ----------------                   ------------------\n    close()\n      mtk_jpeg_release()\n                                       mtk_jpegenc_worker()\n                                         ctx = work-\u003edata\n                                         // accessing ctx\n\n        kfree(ctx)  // freed!\n                                         access ctx  // UAF!\n\nThe work is queued via queue_work() during JPEG encode/decode operations\n(via mtk_jpeg_device_run). If the device is closed while work is pending\nor running, the work handler will access freed memory.\n\nFix this by calling cancel_work_sync() BEFORE acquiring the mutex. This\nordering is critical: if cancel_work_sync() is called after mutex_lock(),\nand the work handler also tries to acquire the same mutex, it would cause\na deadlock.\n\nNote: The open error path does NOT need cancel_work_sync() because\nINIT_WORK() only initializes the work structure - it does not schedule\nit. Work is only scheduled later during ioctl operations."
          }
        ],
        "id": "CVE-2026-46011",
        "lastModified": "2026-06-17T10:52:53.740",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
                "attackComplexity": "LOW",
                "attackVector": "LOCAL",
                "availabilityImpact": "HIGH",
                "baseScore": 7.8,
                "baseSeverity": "HIGH",
                "confidentialityImpact": "HIGH",
                "integrityImpact": "HIGH",
                "privilegesRequired": "LOW",
                "scope": "UNCHANGED",
                "userInteraction": "NONE",
                "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
                "version": "3.1"
              },
              "exploitabilityScore": 1.8,
              "impactScore": 5.9,
              "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-05-27T14:17:19.250",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/0498b27a1542021d90269d58347501d4c3ccd84e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/2209fdae5c2f615930c9af1379c1cfca199ec5d8"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/26506a30e0e26d612f82a7bf0e395626968a44e6"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/34c519feef3e4fcff1078dc8bdb25fbbbd10303f"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "tags": [
              "Patch"
            ],
            "url": "https://git.kernel.org/stable/c/e78c39f720679fcf3a2eacd82725ec3ea2648301"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Analyzed",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-416"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "None",
      "current_release_date": "2026-06-28T07:40:33+00:00",
      "cve": "CVE-2026-46011",
      "id": "CVE-2026-46011",
      "initial_release_date": "2026-05-27T00:00:00+00:00",
      "product_status:known_not_affected": "274",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: media: mtk-jpeg: fix use-after-free in release path due to uncancelled work",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-46011.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-08-31T16:57:49Z",
      "cve": "CVE-2026-46011",
      "id": "CVE-2026-46011",
      "initial_release_date": "2026-05-28T03:54:25Z",
      "product_status:first_fixed": "2",
      "product_status:known_affected": "424",
      "product_status:known_not_affected": "294",
      "product_status:recommended": "254",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-46011",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-46011.json",
      "version": "12"
    }
  }
}



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.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.