high CVSS 7.1 EPSS <0.1%

CVE-2024-35965·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: L2CAP: Fix not validating setsockopt user input Check user input length before copying data.

Severity
high
Software
Kernel
Fixed in
6.8.7
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-2024-35965 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: 6.7

Until: 6.8.7

Fixed in: 6.8.7

How to fix this CVE

Update your Linux kernel to version 6.8.7 or later to patch an input validation flaw in the Bluetooth L2CAP subsystem. This vulnerability allows local attackers with limited privileges to cause denial of service or access sensitive kernel memory through improper socket option handling. Apply the kernel update immediately and reboot your system to activate the patched version.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Check installed kernel version: uname -r — confirm version is 6.8.7 or later
  2. Verify Bluetooth and L2CAP modules are loaded: lsmod | grep -E 'bluetooth|l2cap' — if output shows modules, the vulnerable component is present
  3. Search kernel logs for Bluetooth socket option errors: journalctl -u kernel | grep -i 'l2cap\|setsockopt' — look for repeated failures or memory access warnings
  4. After patching, reboot and verify new kernel version: uname -r — confirm patch level is 6.8.7 or higher

FAQ

What is CVE-2024-35965?

This vulnerability exists in the Linux Bluetooth L2CAP (Logical Link Control and Adaptation Protocol) implementation where socket option parameters are not properly validated before copying user-supplied data into kernel memory. A local user with limited privileges can exploit this by sending malformed socket options to trigger information disclosure or system instability.

Is CVE-2024-35965 being actively exploited?

No, this vulnerability is not currently being actively exploited in the wild according to CISA data, and no public exploits are available. However, the local privilege requirement and high severity rating make it important to patch promptly.

What versions of Kernel are affected by CVE-2024-35965?

Linux kernel versions 6.7 through 6.8.6 are vulnerable. Version 6.8.7 and all later versions include the fix.

How do I check if my server is vulnerable to CVE-2024-35965?

Run 'uname -r' and compare the output to your kernel version. If it shows 6.7.x through 6.8.6, your system is vulnerable. Verify Bluetooth is active with 'systemctl status bluetooth' or check if l2cap module is loaded with 'lsmod | grep l2cap'.

Does Defensia detect CVE-2024-35965?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If Linux kernel is installed on a monitored server, CVE-2024-35965 will appear in your dashboard with remediation steps.

Related Kernel CVEs

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CVE-2026-53151CVSS 9.8In the Linux kernel, the following vulnerability has been resolved: rxrpc: Fix the ACK parser to extract the SACK table for parsing Fix modification of the received skbuff in rxrpc_input_soft_acks() and a potential incorrect access of the buffer in a fragmented UDP packet (the packet would probably have to be deliberately pre-generated as fragmented) when AF_RXRPC tries to extract the contents of the SACK table by copying out the contents of the SACK table into a buffer before attempting to parse AF_RXRPC assumes that it can just call skb_condense() and then validly access the SACK table from skb->data and that it will be a flat buffer - but skb_condense() can silently fail to do anything under some circumstances. Note that whilst rxrpc_input_soft_acks() should be able to parse extended ACKs, the rest of AF_RXRPC doesn't currently support that. Further, there's then no need to call skb_condense() in rxrpc_input_ack(), so don't.
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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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