CVE-2025-21956— drm/amd/display: Assign normalized_pix_clk when color depth = 14
Affected Version Matrix 18
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Linux | Linux | 4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< cca3ab74f90176099b6392e8e894b52b27b3d080 | affected |
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 0174a2e5770efee9dbd4b58963ed4d939298ff5e | affected | ||
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 0c0016712e5dc23ce4a7e673cbebc24a535d8c8a | affected | ||
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< dc831b38680c47d07e425871a9852109183895cf | affected | ||
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< a8f77e1658d78e4a8bb227a83bcee67de97f7634 | affected | ||
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 04f90b505ad3a6eed474bbaa03167095fef5203a | affected | ||
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 27df30106690969f7d63604f0d49ed8e9bffa2cb | affected | ||
4562236b3bc0a28aeb6ee93b2d8a849a4c4e1c7c< 79e31396fdd7037c503e6add15af7cb00633ea92 | affected | ||
| … +10 more rows | |||
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I. Basic Information for CVE-2025-21956
Vulnerability Information
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Vulnerability Title
drm/amd/display: Assign normalized_pix_clk when color depth = 14
Source: NVD (National Vulnerability Database)
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: drm/amd/display: Assign normalized_pix_clk when color depth = 14 [WHY & HOW] A warning message "WARNING: CPU: 4 PID: 459 at ... /dc_resource.c:3397 calculate_phy_pix_clks+0xef/0x100 [amdgpu]" occurs because the display_color_depth == COLOR_DEPTH_141414 is not handled. This is observed in Radeon RX 6600 XT. It is fixed by assigning pix_clk * (14 * 3) / 24 - same as the rests. Also fixes the indentation in get_norm_pix_clk. (cherry picked from commit 274a87eb389f58eddcbc5659ab0b180b37e92775)
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，该漏洞源于未处理14位色深情况导致显示时钟计算异常。
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-2025-21956
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · Linux · 2025-04-01 · 93 CVEs total
| CVE-2025-21947 | 8.1 HIGH | ksmbd: fix type confusion via race condition when using ipc_msg_send_request |
| CVE-2025-21925 | llc: do not use skb_get() before dev_queue_xmit() | |
| CVE-2025-21931 | hwpoison, memory_hotplug: lock folio before unmap hwpoisoned folio | |
| CVE-2025-21934 | rapidio: fix an API misues when rio_add_net() fails | |
| CVE-2025-21935 | rapidio: add check for rio_add_net() in rio_scan_alloc_net() | |
| CVE-2025-21937 | Bluetooth: Add check for mgmt_alloc_skb() in mgmt_remote_name() | |
| CVE-2025-21936 | Bluetooth: Add check for mgmt_alloc_skb() in mgmt_device_connected() | |
| CVE-2025-21939 | drm/xe/hmm: Don't dereference struct page pointers without notifier lock | |
| CVE-2025-21933 | arm: pgtable: fix NULL pointer dereference issue | |
| CVE-2025-21927 | nvme-tcp: fix potential memory corruption in nvme_tcp_recv_pdu() | |
| CVE-2025-21926 | net: gso: fix ownership in __udp_gso_segment | |
| CVE-2025-21928 | HID: intel-ish-hid: Fix use-after-free issue in ishtp_hid_remove() | |
| CVE-2025-21924 | net: hns3: make sure ptp clock is unregister and freed if hclge_ptp_get_cycle returns an e | |
| CVE-2025-21922 | ppp: Fix KMSAN uninit-value warning with bpf | |
| CVE-2025-21923 | HID: hid-steam: Fix use-after-free when detaching device | |
| CVE-2025-21920 | vlan: enforce underlying device type | |
| CVE-2025-21921 | net: ethtool: netlink: Allow NULL nlattrs when getting a phy_device | |
| CVE-2025-21919 | sched/fair: Fix potential memory corruption in child_cfs_rq_on_list | |
| CVE-2025-21918 | usb: typec: ucsi: Fix NULL pointer access | |
| CVE-2025-21917 | usb: renesas_usbhs: Flush the notify_hotplug_work |
Showing top 20 of 93 CVEs. View all on vendor page → →
IV. Related Vulnerabilities
Same product: Linux
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
Same vendor: Linux
- CVE-2026-45846
bareudp: fix NULL pointer dereference in bareudp_fill_metada - CVE-2026-45845
net/sched: taprio: fix NULL pointer dereference in class dum - CVE-2026-45844
netfilter: arp_tables: fix IEEE1394 ARP payload parsing - CVE-2026-45843
slip: bound decode() reads against the compressed packet len - CVE-2026-45842
slip: reject VJ receive packets on instances with no rstate
V. Comments for CVE-2025-21956
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