CVE-2023-54103: 
Linux Debian vulnerability analysis and mitigation

CVE-2023-54103 is a rejected/withdrawn CVE that was originally associated with a use-after-free (UAF) bug in the Linux kernel's media: mtk-jpeg driver. The underlying issue involved an uncanceled work item (mtk_jpeg_job_timeout_work) that could be executed after the associated memory was freed during module removal (mtk_jpeg_remove). The CVE was formally rejected by its CVE Numbering Authority and carries no official CVSS score (base score 0.0); Feedly estimated a MEDIUM severity category (Feedly, EUVD).

The originally described vulnerability was a use-after-free (UAF) bug (CWE-416) in the Linux kernel's MediaTek JPEG codec driver (drivers/media/platform/mediatek/jpeg). During module removal, mtk_jpeg_remove called v4l2_m2m_release, which freed the m2m_dev structure, while a concurrently running mtk_jpeg_job_timeout_work work item could still access m2m_dev->curr_ctx, resulting in a use-after-free condition. The fix involved calling cancel_delayed_work_sync() before cleanup to ensure the work item was fully canceled prior to memory deallocation. Because this CVE has been officially rejected, these technical details reflect the originally reported issue and should be treated with caution (EUVD, Feedly).

As a rejected CVE, no official impact assessment exists. The originally described UAF condition in the MediaTek JPEG kernel driver could theoretically allow a local attacker or a race condition during module unload to cause kernel memory corruption, potentially leading to a system crash (denial of service) or, in more severe scenarios, privilege escalation. However, since the CVE has been withdrawn, these impacts are not formally attributed to this identifier (EUVD).

Because CVE-2023-54103 has been rejected, there is no official patch or advisory tied to this identifier. The underlying Linux kernel issue (UAF in mtk-jpeg due to uncanceled work) was addressed in stable kernel releases including 5.10.199, 5.15.136, 6.1.53, 6.4.16, 6.5.3, and 6.6, via commits that add cancel_delayed_work_sync() before cleanup in mtk_jpeg_remove. Users running affected MediaTek JPEG driver versions should ensure their kernel is updated to one of these patched stable releases (EUVD).