high CVSS 7.1 EPSS <0.1%

CVE-2023-52565·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: media: uvcvideo: Fix OOB read If the index provided by the user is bigger than the mask size, we might do an out of bound read.

Severity
high
Software
Kernel
Fixed in
6.5.6
Published

How likely is exploitation

FIRST's Exploit Prediction Scoring System puts the probability of this CVE being exploited in the next 30 days at <0.1% — in the bottom 1% of all published CVEs. EPSS is an independent forecast of exploitation, not a severity rating: it says nothing about how much damage a successful attack does, which is what a CVSS score measures.

Read the two together. CVE-2023-52565 scores 7.1 on CVSS, so a successful attack would be serious — but at <0.1%, almost nobody is currently attempting it. That is a different situation from a flaw under mass exploitation, and it is usually the difference between patching on your next maintenance window and patching tonight.

Affected versions

From: 6.3

Until: 6.5.6

Fixed in: 6.5.6

How to fix this CVE

Update your Linux kernel to version 6.5.6 or later to patch the out-of-bounds read vulnerability in the uvcvideo driver. This flaw allows local attackers with minimal privileges to read sensitive kernel memory or trigger system instability. Prioritize patching systems that expose USB video capture devices or have uvcvideo module loaded.

sudo dnf check-update kernel && sudo dnf update kernel

Defensia detects this vulnerability

How to check if you are affected

  1. Run 'uname -r' to check your current kernel version and verify if it falls between 6.3 and 6.5.5
  2. Check if uvcvideo module is loaded: 'lsmod | grep uvcvideo' — if output appears, the vulnerable component is active
  3. Search system logs for uvcvideo-related errors: 'dmesg | grep -i uvcvideo' or 'journalctl -u kernel | grep uvcvideo'
  4. After patching, run 'uname -r' again to confirm kernel is version 6.5.6 or later and reboot if needed: 'sudo reboot'

FAQ

What is CVE-2023-52565?

This is an out-of-bounds memory read vulnerability in the Linux kernel's uvcvideo driver that occurs when processing improperly validated user-supplied indices. A local attacker can trigger kernel memory disclosure or denial of service by interacting with USB video capture devices.

Is CVE-2023-52565 being actively exploited?

No, this vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog and no public exploits are currently available.

What versions of Kernel are affected by CVE-2023-52565?

Linux kernel versions 6.3 through 6.5.5 are affected. Version 6.5.6 and later contain the fix.

How do I check if my server is vulnerable to CVE-2023-52565?

Run 'uname -r' and compare the output: if your version is between 6.3 and 6.5.5 (inclusive) and 'lsmod | grep uvcvideo' shows the module loaded, your system is vulnerable.

Does Defensia detect CVE-2023-52565?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Kernel is installed on a monitored server, CVE-2023-52565 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2026-53228CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: ipv6: sit: reload inner IPv6 header after GSO offloads ipip6_tunnel_xmit() caches the inner IPv6 header pointer at function entry and continues using it after iptunnel_handle_offloads(). For GSO skbs, iptunnel_handle_offloads() calls skb_header_unclone(). When the skb header is cloned, skb_header_unclone() can call pskb_expand_head(), which may move the skb head. The pskb_expand_head() contract requires pointers into the skb header to be reloaded after the call. If the later skb_realloc_headroom() branch is not taken, SIT uses the stale iph6 pointer to read the inner hop limit and DS field. That can read from a freed skb head after the old head's remaining clone is released. Reload iph6 after the offload helper succeeds and before subsequent reads from the inner IPv6 header. Keep the existing reload after skb_realloc_headroom(), since that branch can also replace the skb.

References

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