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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2025-37749 Detail

Description

In the Linux kernel, the following vulnerability has been resolved: net: ppp: Add bound checking for skb data on ppp_sync_txmung Ensure we have enough data in linear buffer from skb before accessing initial bytes. This prevents potential out-of-bounds accesses when processing short packets. When ppp_sync_txmung receives an incoming package with an empty payload: (remote) gef➤ p *(struct pppoe_hdr *) (skb->head + skb->network_header) $18 = { type = 0x1, ver = 0x1, code = 0x0, sid = 0x2, length = 0x0, tag = 0xffff8880371cdb96 } from the skb struct (trimmed) tail = 0x16, end = 0x140, head = 0xffff88803346f400 "4", data = 0xffff88803346f416 ":\377", truesize = 0x380, len = 0x0, data_len = 0x0, mac_len = 0xe, hdr_len = 0x0, it is not safe to access data[2]. [[email protected]: fixed subj typo]


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

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URL Source(s) Tag(s)
https://git.kernel.org/stable/c/1f6eb9fa87a781d5370c0de7794ae242f1a95ee5 kernel.org Patch 
https://git.kernel.org/stable/c/529401c8f12ecc35f9ea5d946d5a5596cf172b48 kernel.org Patch 
https://git.kernel.org/stable/c/6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e kernel.org Patch 
https://git.kernel.org/stable/c/99aa698dec342a07125d733e39aab4394b3b7e05 kernel.org Patch 
https://git.kernel.org/stable/c/aabc6596ffb377c4c9c8f335124b92ea282c9821 kernel.org Patch 
https://git.kernel.org/stable/c/b4c836d33ca888695b2f2665f948bc1b34fbd533 kernel.org Patch 
https://git.kernel.org/stable/c/b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca kernel.org Patch 
https://git.kernel.org/stable/c/de5a4f0cba58625e88b7bebd88f780c8c0150997 kernel.org Patch 
https://git.kernel.org/stable/c/fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8 kernel.org Patch 
https://lists.debian.org/debian-lts-announce/2025/05/msg00030.html CVE Mailing List 
https://lists.debian.org/debian-lts-announce/2025/05/msg00045.html CVE Mailing List 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-125 Out-of-bounds Read cwe source acceptance level NIST  

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Change History

4 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2025-37749
NVD Published Date:
05/01/2025
NVD Last Modified:
11/04/2025
Source:
kernel.org