CVE-2025-38240— drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr
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I. Basic Information for CVE-2025-38240
Vulnerability Information
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Vulnerability Title
drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/mediatek: dp: drm_err => dev_err in HPD path to avoid NULL ptr The function mtk_dp_wait_hpd_asserted() may be called before the `mtk_dp->drm_dev` pointer is assigned in mtk_dp_bridge_attach(). Specifically it can be called via this callpath: - mtk_edp_wait_hpd_asserted - [panel probe] - dp_aux_ep_probe Using "drm" level prints anywhere in this callpath causes a NULL pointer dereference. Change the error message directly in mtk_dp_wait_hpd_asserted() to dev_err() to avoid this. Also change the error messages in mtk_dp_parse_capabilities(), which is called by mtk_dp_wait_hpd_asserted(). While touching these prints, also add the error code to them to make future debugging easier.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于HPD路径使用drm_err而非dev_err，可能导致空指针取消引用。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2025-38240
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Same Patch Batch · Linux · 2025-04-18 · 23 CVEs total
| CVE-2025-38637 | net_sched: skbprio: Remove overly strict queue assertions | |
| CVE-2025-37785 | ext4: fix OOB read when checking dotdot dir | |
| CVE-2025-37860 | sfc: fix NULL dereferences in ef100_process_design_param() | |
| CVE-2025-37925 | jfs: reject on-disk inodes of an unsupported type | |
| CVE-2025-37893 | LoongArch: BPF: Fix off-by-one error in build_prologue() | |
| CVE-2025-38049 | x86/resctrl: Fix allocation of cleanest CLOSID on platforms with no monitors | |
| CVE-2025-38104 | drm/amdgpu: Replace Mutex with Spinlock for RLCG register access to avoid Priority Inversi | |
| CVE-2025-38152 | remoteproc: core: Clear table_sz when rproc_shutdown | |
| CVE-2025-38479 | dmaengine: fsl-edma: free irq correctly in remove path | |
| CVE-2025-38575 | ksmbd: use aead_request_free to match aead_request_alloc | |
| CVE-2025-39688 | nfsd: allow SC_STATUS_FREEABLE when searching via nfs4_lookup_stateid() | |
| CVE-2025-37838 | HSI: ssi_protocol: Fix use after free vulnerability in ssi_protocol Driver Due to Race Con | |
| CVE-2025-39735 | jfs: fix slab-out-of-bounds read in ea_get() | |
| CVE-2025-39728 | clk: samsung: Fix UBSAN panic in samsung_clk_init() | |
| CVE-2025-39755 | staging: gpib: Fix cb7210 pcmcia Oops | |
| CVE-2025-39778 | objtool, nvmet: Fix out-of-bounds stack access in nvmet_ctrl_state_show() | |
| CVE-2025-39930 | ASoC: simple-card-utils: Don't use __free(device_node) at graph_util_parse_dai() | |
| CVE-2025-39989 | x86/mce: use is_copy_from_user() to determine copy-from-user context | |
| CVE-2025-40014 | objtool, spi: amd: Fix out-of-bounds stack access in amd_set_spi_freq() | |
| CVE-2025-40114 | iio: light: Add check for array bounds in veml6075_read_int_time_ms |
Showing top 20 of 23 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
Same vendor: Linux
- CVE-2026-43500
rxrpc: Also unshare DATA/RESPONSE packets when paged frags a - CVE-2026-43475
scsi: storvsc: Fix scheduling while atomic on PREEMPT_RT - CVE-2026-43474
fs: init flags_valid before calling vfs_fileattr_get - CVE-2026-43473
scsi: mpi3mr: Add NULL checks when resetting request and rep - CVE-2026-43472
unshare: fix unshare_fs() handling
V. Comments for CVE-2025-38240
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