CVE-2026-53182 wifi: nl80211: reject oversized EMA RNR lists
An integer overflow in the Linux kernel Wi-Fi driver allows attackers to cause memory corruption or denial of service via oversized RNR lists.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- Available
What is CVE-2026-53182?
CVE-2026-53182 is a high-severity vulnerability in Linux kernel, published on 25 Jun 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
In the Linux kernel, the following vulnerability has been resolved:
wifi: nl80211: reject oversized EMA RNR lists
nl80211_parse_rnr_elems() stores the parsed element count in a u8-backed cfg80211_rnr_elems::cnt field and uses that count to size the flexible array allocation.
Reject nested NL80211_ATTR_EMA_RNR_ELEMS input once the count reaches 255, before incrementing it again. This keeps the parser aligned with the data structure it fills and matches the existing bound check used by nl80211_parse_mbssid_elems().
Weakness: CWE-190
Which versions are affected by CVE-2026-53182?
It affects 1 product.
Products include Linux kernel.
How do I fix CVE-2026-53182?
Apply the vendor's patch.
Is CVE-2026-53182 being exploited?
There is no known exploitation of CVE-2026-53182 in the wild and no public exploit code.
Other vulnerabilities in Linux kernel
Sources
Also known as AZL-90905, BELL-CVE-2026-53182, DEBIAN-CVE-2026-53182, GHSA-q6qm-26ch-2w94, ROOT-OS-DEBIAN-12-CVE-2026-53182, ROOT-OS-UBUNTU-2404-CVE-2026-53182 and 1 more.