CVE-2026-80948 Linux CVE debrief

Who should care

Linux kernel maintainers, users, and administrators should assess exposure and prioritize patching or verification to prevent potential denial-of-service attacks. The vulnerability affects Linux kernel users and administrators who need to review and apply the fix for the iwlwifi dvm module. Security teams and vulnerability management teams should also be aware of the issue and prioritize remediation efforts.

Why it matters

A memory leak vulnerability was found in the Linux kernel's iwlwifi dvm module, requiring patching or verification to prevent potential issues.

• Memory leak vulnerability requires patching or verification to prevent potential denial-of-service
• Linux kernel users and administrators must assess exposure and prioritize remediation

Technical summary

The iwl_op_mode_dvm_start() function in the Linux kernel's iwlwifi dvm module has a memory leak vulnerability. The bug occurs when an error path bypasses the out_free_eeprom_blob label, causing a memory leak of priv->eeprom_blob. This issue was resolved by reordering the error handling labels. The vulnerability could potentially lead to denial-of-service attacks if exploited. Linux kernel maintainers and users should assess exposure and prioritize patching or verification to prevent potential issues. The fix involves reordering error handling labels to ensure proper memory cleanup.

Defensive priority

Linux kernel maintainers and users should assess exposure and prioritize patching or verification.

Recommended defensive actions

• Assess exposure and prioritize patching or verification for Linux kernel users
• Review and apply the fix for the iwlwifi dvm module
• Monitor for potential memory leak issues in the Linux kernel
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The vulnerability was identified by an experimental analysis tool and confirmed through manual inspection. The issue is present in v7.1-rc6 and was fixed in a later kernel version. The analysis tool used to identify the vulnerability is still under development and not yet publicly available. Manual inspection confirms the bug is still present in v7.1-rc6. An x86_64 allyesconfig build showed no new warnings.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.