U.S. flag   An official website of the United States government
Dot gov

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Https

Secure .gov websites use HTTPS
A lock (Dot gov) or https:// means you've safely connected to the .gov website. Share sensitive information only on official, secure websites.

National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-39847 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: ppp: fix memory leak in pad_compress_skb If alloc_skb() fails in pad_compress_skb(), it returns NULL without releasing the old skb. The caller does: skb = pad_compress_skb(ppp, skb); if (!skb) goto drop; drop: kfree_skb(skb); When pad_compress_skb() returns NULL, the reference to the old skb is lost and kfree_skb(skb) ends up doing nothing, leading to a memory leak. Align pad_compress_skb() semantics with realloc(): only free the old skb if allocation and compression succeed. At the call site, use the new_skb variable so the original skb is not lost when pad_compress_skb() fails.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

References to Advisories, Solutions, and Tools

By selecting these links, you will be leaving NIST webspace. We have provided these links to other web sites because they may have information that would be of interest to you. No inferences should be drawn on account of other sites being referenced, or not, from this page. There may be other web sites that are more appropriate for your purpose. NIST does not necessarily endorse the views expressed, or concur with the facts presented on these sites. Further, NIST does not endorse any commercial products that may be mentioned on these sites. Please address comments about this page to [email protected].

URL Source(s) Tag(s)
https://cert-portal.siemens.com/productcert/html/ssa-032379.html siemens-SADP
https://git.kernel.org/stable/c/0b21e9cd4559102da798bdcba453b64ecd7be7ee kernel.org Patch 
https://git.kernel.org/stable/c/1d8b354eafb8876d8bdb1bef69c7d2438aacfbe8 kernel.org Patch 
https://git.kernel.org/stable/c/33a5bac5f14772730d2caf632ae97b6c2ee95044 kernel.org Patch 
https://git.kernel.org/stable/c/4844123fe0b853a4982c02666cb3fd863d701d50 kernel.org Patch 
https://git.kernel.org/stable/c/631fc8ab5beb9e0ec8651fb9875b9a968e7b4ae4 kernel.org Patch 
https://git.kernel.org/stable/c/85c1c86a67e09143aa464e9bf09c397816772348 kernel.org Patch 
https://git.kernel.org/stable/c/87a35a36742df328d0badf4fbc2e56061c15846c kernel.org Patch 
https://git.kernel.org/stable/c/9ca6a040f76c0b149293e430dabab446f3fc8ab7 kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html CVE Mailing List  Third Party Advisory 
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html CVE Mailing List  Third Party Advisory 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-401 Missing Release of Memory after Effective Lifetime cwe source acceptance level NIST  

Known Affected Software Configurations Switch to CPE 2.2

CPEs loading, please wait.

Denotes Vulnerable Software
Are we missing a CPE here? Please let us know.

Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-39847
NVD Published Date:
09/19/2025
NVD Last Modified:
05/12/2026
Source:
kernel.org