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CVE-2025-40053

HIGHCVSS 7.5/10EPSS 0.21%

Last modified

CVE-2025-40053 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. In the Linux kernel, the following vulnerability has been resolved: net: dlink: handle copy_thresh allocation failure The driver did not handle failure of `netdev_alloc_skb_ip_align()`. If the allocation failed, dereferencing `skb->protocol` could lead to a NULL pointer dereference. This patch tries to allocate `skb`. If the allocation fails, it falls back to the normal path. Tested-on: D-Link DGE-550T Rev-A3. EPSS estimates a 0.21% chance of exploitation in the next 30 days.

Description

In the Linux kernel, the following vulnerability has been resolved: net: dlink: handle copy_thresh allocation failure The driver did not handle failure of `netdev_alloc_skb_ip_align()`. If the allocation failed, dereferencing `skb->protocol` could lead to a NULL pointer dereference. This patch tries to allocate `skb`. If the allocation fails, it falls back to the normal path. Tested-on: D-Link DGE-550T Rev-A3

Metrics

CVSS 3.1
7.5/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability
0.21%

10.9th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Source: CNA advisory (CVE.org). NVD analysis pending.

VendorProductVersions
LinuxLinux>= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 84fd710a704f3d53d4120e452e86cea558cf73a8; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 5aa9b885602811a026a3f45c92ea2b4b04c54f09; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 9d49e4b14609e1a20d931e718962c4b6b5485174; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < ea87151df398d407a632c7bf63013290f01c5009; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 7ed5010fef0930f4322d620052edc854ef3ec41f; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < fd7b6b2c920d7fd370a612be416a904d6e1ebe55; >= 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2, < 8169a6011c5fecc6cb1c3654c541c567d3318de8
LinuxLinux2.6.12

References

Timeline

Published
Last Modified
Status
Deferred

Frequently Asked Questions

What is CVE-2025-40053?
In the Linux kernel, the following vulnerability has been resolved: net: dlink: handle copy_thresh allocation failure The driver did not handle failure of `netdev_alloc_skb_ip_align()`. If the allocation failed, dereferencing `skb->protocol` could lead to a NULL pointer dereference. This patch tries to allocate `skb`. If the allocation fails, it falls back to the normal path. Tested-on: D-Link DGE-550T Rev-A3
How severe is CVE-2025-40053?
CVE-2025-40053 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.21% probability of exploitation in the next 30 days.
How do I fix CVE-2025-40053?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST