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
Linux Linux Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 2209fdae5c2f615930c9af1379c1cfca199ec5d8 (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 0498b27a1542021d90269d58347501d4c3ccd84e (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 26506a30e0e26d612f82a7bf0e395626968a44e6 (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < e78c39f720679fcf3a2eacd82725ec3ea2648301 (git)
Affected: 5fb1c2361e5630491d2a2f9359654eb022601bc0 , < 34c519feef3e4fcff1078dc8bdb25fbbbd10303f (git)
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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)
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      "title": "kernel: media: mtk-jpeg: fix use-after-free in release path due to uncancelled work",
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      "cve": "CVE-2026-46011",
      "id": "CVE-2026-46011",
      "initial_release_date": "2026-05-28T03:54:25Z",
      "product_status:known_affected": "30",
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      "product_status:recommended": "102",
      "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": "7"
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}