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        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amdkfd: Add TLB flush after MES queue eviction/suspension\n\nMES (Micro Engine Scheduler) does not perform heavy-weight TLB\ninvalidation after unmapping queues, unlike HWS which does this\nautomatically. This causes a race condition where in-flight DMA\ndescriptors can access memory that has been unmapped, leading to page\nfaults and GPU queue hangs during SVM page migration.\n\nThe issue manifests as KFDSVMRangeTest.MultiThreadMigrationTest\nfailures on gfx1151 (Strix Point) with XNACK mode 1 enabled - the GPU\ncompute queue hangs with packets submitted but never consumed.\n\nAdd kfd_flush_tlb() calls after MES queue removal in two locations:\n- evict_process_queues_cpsch(): after all queues removed during eviction\n- suspend_queues(): after debug/criu queue suspension (with mem_fence barrier)\n\nThis ensures all in-flight memory accesses from unmapped queues are\nflushed before memory is freed or migrated.\n\n(cherry picked from commit f5c4f88e0f9c45a8fb9dfac0c1df726c95e41b77)"
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              "value": "AV:L - The bug is reached only via local /dev/kfd paths: AMDKFD_IOC_CREATE_QUEUE plus SVM/userptr activity (AMDKFD_IOC_SVM, munmap of USERPTR BOs) or KFD_IOC_DBG_TRAP_SUSPEND_QUEUES, which call evict_process_queues_cpsch()/suspend_queues(); there is no network, adjacent-wireless, or physical-device path.\nAC:L - The attacker controls both sides of the race: they keep DMA in flight on their own MES compute/SDMA queues while concurrently forcing eviction or suspend via SVM migration, userptr MMU notifiers, TTM pressure, or self-debug suspend, matching the MultiThreadMigrationTest trigger with no victim timing or uncontrollable layout required.\nPR:L - kfd_open() and the CREATE_QUEUE/SVM/DBG_TRAP ioctls perform no capability checks; a local unprivileged user with typical render/video-group access to /dev/kfd and /dev/dri/renderD* on desktops, ROCm nodes, and multi-tenant AMD GPU clouds is sufficient, not init-namespace root.\nUI:N - The attacker opens their own KFD and DRM render-node descriptors, submits compute work, and triggers queue eviction or suspend in that same process; no separate victim action such as mounting a filesystem or opening a crafted file is required.\nS:C - MES queue removal omits the heavyweight PASID TLB invalidation HWS performs, so in-flight GPU DMA can use stale GPUVM translations to physical pages after they are unmapped, freed, or migrated, bypassing the GPUVM/PASID DMA isolation boundary that is supposed to confine GPU access.\nC:H - In-flight GPU DMA through stale GPUVM TLB entries can read physical pages after they leave the process mapping and are recycled to the page allocator, kernel, or another process, giving an arbitrary memory-disclosure primitive.\nI:H - The same stale translations allow GPU DMA writes into those recycled physical pages, enabling arbitrary memory corruption and control-flow hijacking through a device DMA write primitive.\nA:H - The issue is documented to cause GPU page faults and compute-queue hangs (packets submitted but never consumed), which can stall the shared GPU and force amdgpu reset, denying compute service to all co-located workloads."
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    "dateReserved": "2026-09-11T19:38:34.768Z",
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: cx231xx: reject geometry changes while the VBI queue is busy\n\nvidioc_s_fmt_vid_cap() and vidioc_s_std() change the device-wide\ndev-\u003ewidth / dev-\u003enorm but only refuse the change when the *video* queue\n(dev-\u003evidq) is busy. The VBI queue (dev-\u003evbiq) shares that same geometry:\ncx231xx_init_vbi_isoc() latches dma_q-\u003elines_per_field from dev-\u003enorm,\nthe VBI videobuf2 plane is sized from dev-\u003ewidth / dev-\u003enorm in\nvbi_queue_setup() and vbi_buf_prepare(), and cx231xx_do_vbi_copy() then\nrecomputes the destination offset from the *live* dev-\u003ewidth and the\nlatched lines_per_field on every URB completion:\n\n\toffset = lines_completed * (dev-\u003ewidth \u003c\u003c 1) + ...;\n\tif (dma_q-\u003ecurrent_field == 2)\n\t\toffset += dev-\u003ewidth * 2 * dma_q-\u003elines_per_field;\n\tmemcpy(plane + offset, p_buffer, lencopy);\n\nBecause the VBI node shares video_ioctl_ops with the video node, an\napplication can size a small VBI plane (REQBUFS/QBUF with a small width,\nor with the NTSC standard), then enlarge dev-\u003ewidth (or switch dev-\u003enorm\nto PAL) through the video node while the VBI stream is running -- the\nchange is allowed because only dev-\u003evidq is checked -- and let the device\ndeliver a field-2 VBI payload. cx231xx_do_vbi_copy() now computes the\noffset with the larger geometry and memcpy()s past the end of the smaller\nplane that was already allocated, a heap out-of-bounds write whose offset\nis attacker-chosen and whose contents come from the device. The\nper-field guard in cx231xx_copy_vbi_line() does not help: it bounds the\ncopy against the latched lines_per_field, not the plane\u0027s real capacity,\nand vb2 does not re-run buf_prepare() for an already prepared buffer.\n\nRefuse the format/standard change when the VBI queue is busy as well, so\nthe geometry cannot change underneath an allocated VBI buffer."
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            "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"
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              "value": "AV:L - The overflow is reached only through local V4L2 ioctls (VIDIOC_S_FMT/VIDIOC_S_STD plus REQBUFS/QBUF/STREAMON) on the cx231xx /dev/videoN and /dev/vbiN nodes. A USB capture stick being present is a hardware precondition; the attacker does not inject USB packets, so the path is Local rather than Physical.\nAC:L - The attacker fully controls the sequence: shrink width via VIDIOC_S_FMT, allocate a small VBI plane, STREAMON, then enlarge width or switch standard on the video node while only vidq was checked. Subsequent URB completions copy field-2 VBI with the new geometry into the old plane with no race or layout outside the attacker\u0027s control.\nPR:L - cx231xx_v4l2_open(), vidioc_s_fmt_vid_cap(), and vidioc_s_std() perform no capability checks. Triggering the bug needs only an unprivileged local user who can open the V4L2 nodes, which udev grants via the video group and uaccess/logind (or the Android camera context), not init-namespace root.\nUI:N - The attacking process opens /dev/videoN and /dev/vbiN and issues the ioctl sequence itself. No separate victim action such as plugging in a device, mounting a filesystem, or running a privileged helper is required.\nS:U - The out-of-bounds memcpy corrupts kernel vmalloc memory belonging to the same host kernel. Impact is local privilege-escalation or denial of service within one security authority, not a VM escape, IOMMU bypass, or other cross-boundary effect.\nC:H - cx231xx_do_vbi_copy() memcpy()s past the undersized VBI plane at an attacker-chosen offset derived from the new width and latched lines_per_field. That heap out-of-bounds write can smash adjacent vmalloc objects and is leverageable for a kernel read primitive.\nI:H - The same attacker-chosen-offset heap out-of-bounds write overwrites kernel memory after the VBI buffer on every field-2 URB completion. An out-of-bounds write of this form is sufficient for control-flow hijacking and an arbitrary write primitive.\nA:H - memcpy() past the allocated VBI plane faults on a vmalloc guard page or corrupts adjacent kernel memory, producing a kernel oops or panic from URB completion context and taking down the host."
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              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc2",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.1.188",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.6.157",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.12.110",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.51",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.5",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc2",
                  "versionStartIncluding": "6.0",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnvmet-auth: Synchronize timeout work during SQ teardown\n\nnvmet_auth_sq_free() cancels auth_expired_work with\ncancel_delayed_work(). If the work has already started, cancellation does\nnot wait for the callback. Transport teardown can consequently free or\nreuse the queue containing struct nvmet_sq while\nnvmet_auth_expired_work() still accesses that SQ.\n\nAdd a teardown-specific helper that synchronously drains the delayed work\nbefore freeing authentication state, and use it from nvmet_sq_destroy().\nKeep the non-synchronous helper for in-band authentication state cleanup,\nwhere the SQ owner remains alive."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
          "scenarios": [
            {
              "lang": "en",
              "value": "AV:N - The UAF is in nvmet-auth timeout work reached via AUTH_SEND on NVMe-oF targets; nvmet-tcp (and nvmet-rdma) accept remote connections, so a network initiator can arm the timer and tear down the queue over TCP/RDMA.\nAC:L - The attacker controls both sides of the race: AUTH_SEND schedules auth_expired_work with an attacker-chosen KATO delay, and closing the connection runs nvmet_sq_destroy(); cancel_delayed_work() does not wait, so the race is repeatable.\nPR:N - AUTH_SEND is dispatched as a Fabrics command before nvmet_check_auth_status() and before DH-HMAC-CHAP credentials are verified; discovery accepts any host NQN, so no Linux privileges or verified secrets are required.\nUI:N - No victim user action is required; the attacker connects to an already-deployed NVMe-oF target, sends AUTH_SEND to arm the timeout, and disconnects when the work is due.\nS:U - The use-after-free corrupts the in-kernel nvmet_sq/queue object on the target host and does not cross a VM, hypervisor, or IOMMU security boundary.\nC:H - Transport teardown can free or reuse the queue containing struct nvmet_sq while nvmet_auth_expired_work() still accesses it; that UAF can be leveraged for kernel information disclosure via heap reuse.\nI:H - The delayed work writes dhchap_step and dhchap_tid into a potentially freed or reused queue object, giving a kernel UAF write primitive exploitable for memory corruption and control-flow hijacking.\nA:H - Racing the timeout callback against SQ teardown is a kernel UAF of the queue and can oops or panic; the work may also dereference sq-\u003ectrl after teardown has already cleared it."
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-16T14:40:49.745Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/664022fa1c93f4eba09ef5ee02411b9709dd7a93"
        },
        {
          "url": "https://git.kernel.org/stable/c/c3c126a6142a1335bc8c34a5607c39cf01daf295"
        },
        {
          "url": "https://git.kernel.org/stable/c/c17c87bde6d6f5252a6a6f0a94b2430164aa28d5"
        },
        {
          "url": "https://git.kernel.org/stable/c/7555ddd60af72df2862dd8f9b730a9848577edda"
        },
        {
          "url": "https://git.kernel.org/stable/c/eb4f9127a2b8a152743f1ee597627e2f69cb54fe"
        },
        {
          "url": "https://git.kernel.org/stable/c/eaa948c0e19b1bb2d93262207bca0c3d19cc3406"
        }
      ],
      "title": "nvmet-auth: Synchronize timeout work during SQ teardown",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-89970",
    "datePublished": "2026-09-16T10:32:50.306Z",
    "dateReserved": "2026-09-11T19:38:34.778Z",
    "dateUpdated": "2026-09-16T14:40:49.745Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}