CVE-2025-37749

HIGH EPSS 5.7%
Published May 1, 20251y ago · Modified Jun 17, 20261w ago
7.1 CVSS 3.1
High
Find Similar
Published May 1, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

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]. [pabeni@redhat.com: fixed subj typo]

CVSS Details

Base Score
7.1
Exploitability
1.8
Impact
5.2
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability High

Threat Intelligence

EPSS Exploit Probability
5.7% percentile
Exploit & Patch Status
No Known Exploit
Patch Available

Weaknesses 1

CWE-125 Out-of-bounds Read Memory Safety

Affected Products 15

VendorProductVersionRange
linuxlinux_kernel*≥2.6.13  –  <5.4.293
linuxlinux_kernel*≥5.5  –  <5.10.237
linuxlinux_kernel*≥5.11  –  <5.15.181
linuxlinux_kernel*≥5.16  –  <6.1.135
linuxlinux_kernel*≥6.2  –  <6.6.88
linuxlinux_kernel*≥6.7  –  <6.12.24
linuxlinux_kernel*≥6.13  –  <6.13.12
linuxlinux_kernel*≥6.14  –  <6.14.3
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel2.6.12any
linuxlinux_kernel6.15any
debiandebian_linux11.0any

References 11

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

Remediation

  • git.kernel.org https://git.kernel.org/stable/c/1f6eb9fa87a781d5370c0de7794ae242f1a95ee5
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/529401c8f12ecc35f9ea5d946d5a5596cf172b48
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/6e8a6bf43cea4347121ab21bb1ed8d7bef7e732e
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/99aa698dec342a07125d733e39aab4394b3b7e05
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/aabc6596ffb377c4c9c8f335124b92ea282c9821
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b4c836d33ca888695b2f2665f948bc1b34fbd533
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/b78f2b458f56a5a4d976c8e01c43dbf58d3ea2ca
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/de5a4f0cba58625e88b7bebd88f780c8c0150997
    Patch
  • git.kernel.org https://git.kernel.org/stable/c/fbaffe8bccf148ece8ad67eb5d7aa852cabf59c8
    Patch