{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-97513", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-24T16:01:01.151Z", "datePublished": "2026-09-24T16:05:10.589Z", "dateUpdated": "2026-10-21T12:52:59.580Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-21T12:52:59.580Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmedia: chips-media: wave5: Release m2m_ctx after Instance Removed from List\n\nPossible use after free if IRQ thread manages to obtain spinlock between\nm2m_ctx release and wave5_release function removing stream instance from\nlist of active instances. The IRQ thread looks for the m2m_ctx which is\nfreed so null pointer dereference occurs." } ], "metrics": [ { "cvssV3_1": { "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" }, "scenarios": [ { "lang": "en", "value": "AV:L - The UAF is in wave5_vpu_release_device(), reached only by close() on the Wave5 V4L2 mem2mem node (/dev/videoN): v4l2_release -> wave5_vpu_dec_release/wave5_vpu_enc_release. No network, Bluetooth, or USB packet supplies the triggering state.\nAC:L - The attacker queues decode/encode work so the VPU raises INT_WAVE5_DEC_PIC/ENC_PIC into inst->irq_status, then close()s so v4l2_m2m_ctx_release() kfree's m2m_ctx while the instance is still on dev->instances. Both sides of the race (STREAMON/QBUF vs close) are attacker-controlled and retryable.\nPR:L - v4l2_open, wave5_vpu_open_dec(), and wave5_vpu_open_enc() perform no capable() checks; access is only the video node. On TI K3 systems that ship this driver, that node is available to unprivileged video-group or media-client users, not init-namespace root.\nUI:N - The attacker opens the Wave5 decoder or encoder themselves, STREAMONs, and close()s that fd to enter wave5_vpu_release_device(). No separate victim action such as mounting a filesystem is required.\nS:U - The UAF of inst->v4l2_fh.m2m_ctx is in the host Wave5 media driver and affects the same kernel security authority. It is not a VM escape, IOMMU bypass, or other cross-boundary impact.\nC:H - After v4l2_m2m_ctx_release() kfree's m2m_ctx, wave5_vpu_irq_thread() still finds the instance on dev->instances and wave5_vpu_dec_finish_decode()/wave5_vpu_enc_finish_encode() read the freed object (v4l2_m2m_get_dst_vq and related helpers), a slab UAF that enables arbitrary read.\nI:H - The same finish_process path writes through the freed m2m_ctx via v4l2_m2m_job_finish(), v4l2_m2m_dst_buf_remove_by_idx()/v4l2_m2m_src_buf_remove_by_idx(), and v4l2_m2m_buf_done(), so reclaiming the kzalloc'd context yields a kernel write/control-flow primitive.\nA:H - Use of the dangling m2m_ctx in wave5_vpu_dec_finish_decode()/wave5_vpu_enc_finish_encode() oopses the kernel (the commit documents a NULL deref of the freed context) even when the UAF is not fully exploited." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/platform/chips-media/wave5/wave5-helper.c" ], "versions": [ { "version": "9707a6254a8a6b978bde811a44fe07d86c229d1c", "lessThan": "0e6bdd437a3c7a5d8846d7f58fe9645a60ec0933", "status": "affected", "versionType": "git" }, { "version": "9707a6254a8a6b978bde811a44fe07d86c229d1c", "lessThan": "04cda0b5c4ca3f61cbc86e41ead3c462c8cfd659", "status": "affected", "versionType": "git" }, { "version": "9707a6254a8a6b978bde811a44fe07d86c229d1c", "lessThan": "7cdbd7bb21949a8fda10c7104a2b12ee363cbf5c", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/media/platform/chips-media/wave5/wave5-helper.c" ], "versions": [ { "version": "6.8", "status": "affected" }, { "version": "0", "lessThan": "6.8", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.114", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.53", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.12.114" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "6.18.53" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.8", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/0e6bdd437a3c7a5d8846d7f58fe9645a60ec0933" }, { "url": "https://git.kernel.org/stable/c/04cda0b5c4ca3f61cbc86e41ead3c462c8cfd659" }, { "url": "https://git.kernel.org/stable/c/7cdbd7bb21949a8fda10c7104a2b12ee363cbf5c" } ], "title": "media: chips-media: wave5: Release m2m_ctx after Instance Removed from List", "x_generator": { "engine": "bippy-1.2.0" } } } }