CVE-2025-21821
5.5 · MEDIUMOverview
CVE-2025-21821 is a medium-severity vulnerability affecting linux linux_kernel. It was published on February 27, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).
This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
Technical Description
In the Linux kernel, the following vulnerability has been resolved:
fbdev: omap: use threaded IRQ for LCD DMA
When using touchscreen and framebuffer, Nokia 770 crashes easily with:
BUG: scheduling while atomic: irq/144-ads7846/82/0x00010000
Modules linked in: usb_f_ecm g_ether usb_f_rndis u_ether libcomposite configfs omap_udc ohci_omap ohci_hcd
CPU: 0 UID: 0 PID: 82 Comm: irq/144-ads7846 Not tainted 6.12.7-770 #2
Hardware name: Nokia 770
Call trace:
unwind_backtrace from show_stack+0x10/0x14
show_stack from dump_stack_lvl+0x54/0x5c
dump_stack_lvl from __schedule_bug+0x50/0x70
__schedule_bug from __schedule+0x4d4/0x5bc
__schedule from schedule+0x34/0xa0
schedule from schedule_preempt_disabled+0xc/0x10
schedule_preempt_disabled from __mutex_lock.constprop.0+0x218/0x3b4
__mutex_lock.constprop.0 from clk_prepare_lock+0x38/0xe4
clk_prepare_lock from clk_set_rate+0x18/0x154
clk_set_rate from sossi_read_data+0x4c/0x168
Remediation
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
Affected Products
| Vendor | Product | Versions | Status |
|---|---|---|---|
| linux | linux_kernel | >= 0, < 6.1.129 | Affected |
References
Frequently Asked Questions
What is CVE-2025-21821?
CVE-2025-21821 is a medium-severity vulnerability affecting linux linux_kernel. It was published on February 27, 2025 and has a CVSS 3.1 base score of 5.5 (MEDIUM).
How severe is CVE-2025-21821?
This vulnerability has a CVSS 3.1 base score of 5.5, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.
How do I fix or remediate CVE-2025-21821?
Check the references section for vendor advisories and patches from linux. Update linux_kernel to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.
How can CyberStrike help with CVE-2025-21821?
CyberStrike's AI-powered security agents can automatically detect CVE-2025-21821 across your infrastructure using autonomous pentesting, DAST scanning, and HackBrowser. The platform continuously monitors for known vulnerabilities and provides actionable remediation guidance prioritized by real-world exploitability.
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