high CVSS 7.8 EPSS <0.1%

CVE-2024-50209·Kernel vulnerability

In the Linux kernel, the following vulnerability has been resolved: RDMA/bnxt_re: Add a check for memory allocation __alloc_pbl() can return error when memory allocation fails. Driver is not checking the status on one of the instances.

Severity
high
Software
Kernel
Fixed in
6.11.6
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% — higher than 6% 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-2024-50209 scores 7.8 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: 6.11.6

Fixed in: 6.11.6

How to fix this CVE

CVE-2024-50209 is a memory allocation failure check in the RDMA bnxt_re driver that can lead to kernel instability or privilege escalation. Upgrade your Linux kernel to version 6.11.6 or later to include the necessary validation logic for memory allocation operations. Systems running kernel versions 6.7 through 6.11.5 should prioritize this update to prevent potential exploitation by local users with minimal privileges.

sudo dnf update kernel kernel-devel

Defensia detects this vulnerability

How to check if you are affected

  1. Step 1: Check installed kernel version with `uname -r` and compare against affected range 6.7 to 6.11.5
  2. Step 2: Verify if RDMA/bnxt_re driver is loaded with `lsmod | grep bnxt_re`
  3. Step 3: Search system logs for memory allocation errors related to RDMA: `journalctl -u kernel | grep -i 'alloc_pbl\|bnxt_re.*alloc'`
  4. Step 4: After patching, confirm new kernel version with `uname -r` and verify it matches 6.11.6 or later

FAQ

What is CVE-2024-50209?

CVE-2024-50209 is a kernel vulnerability in the RDMA bnxt_re driver where a memory allocation failure is not properly validated, potentially allowing local privilege escalation or denial of service.

Is CVE-2024-50209 being actively exploited?

No, according to CISA's Known Exploited Vulnerabilities (KEV) catalog, CVE-2024-50209 is not currently being actively exploited in the wild, and no public exploits are available.

What versions of Kernel are affected by CVE-2024-50209?

Linux kernel versions 6.7 through 6.11.5 are vulnerable. The vulnerability has been resolved in kernel version 6.11.6 and later.

How do I check if my server is vulnerable to CVE-2024-50209?

Run `uname -r` to display your kernel version and compare it against the affected range (6.7-6.11.5). If your version falls within this range and the bnxt_re module is loaded (`lsmod | grep bnxt_re`), your system is vulnerable.

Does Defensia detect CVE-2024-50209?

Yes — Defensia's CVE advisory scanner compares installed package versions against the NVD database. If the Linux kernel is installed on a monitored server, CVE-2024-50209 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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