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5.5
MEDIUM CVSS 3.1
CVE-2025-38639
netfilter: xt_nfacct: don't assume acct name is null-terminated
Description

In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_nfacct: don't assume acct name is null-terminated BUG: KASAN: slab-out-of-bounds in .. lib/vsprintf.c:721 Read of size 1 at addr ffff88801eac95c8 by task syz-executor183/5851 [..] string+0x231/0x2b0 lib/vsprintf.c:721 vsnprintf+0x739/0xf00 lib/vsprintf.c:2874 [..] nfacct_mt_checkentry+0xd2/0xe0 net/netfilter/xt_nfacct.c:41 xt_check_match+0x3d1/0xab0 net/netfilter/x_tables.c:523 nfnl_acct_find_get() handles non-null input, but the error printk relied on its presence.

INFO

Published Date :

Aug. 22, 2025, 4:15 p.m.

Last Modified :

Jan. 7, 2026, 4:25 p.m.

Remotely Exploit :

No

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67
Affected Products

The following products are affected by CVE-2025-38639 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
1 Debian debian_linux
: Total Affected Vendor : 2 | Products : 2
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 3.1 MEDIUM [email protected]
Solution
Update the Linux kernel to fix a slab-out-of-bounds vulnerability in xt_nfacct.
  • Update the Linux kernel to the latest version.
  • Apply the specific patch for xt_nfacct vulnerability.
  • Ensure acct name handling is robust in netfilter.
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2025-38639.

URL Resource
https://git.kernel.org/stable/c/58004aa21e79addaf41667bfe65e93ec51653f18 Patch
https://git.kernel.org/stable/c/58007fc7b94fb2702000045ff401eb7f5bde7828 Patch
https://git.kernel.org/stable/c/66d41268ede1e1b6e71ba28be923397ff0b2b9c3 Patch
https://git.kernel.org/stable/c/7c1ae471da69c09242834e956218ea6a42dd405a Patch
https://git.kernel.org/stable/c/b10cfa2de13d28ddd03210eb234422b7ec92725a Patch
https://git.kernel.org/stable/c/bf58e667af7d96c8eb9411f926a0a0955f41ce21 Patch
https://git.kernel.org/stable/c/df13c9c6ce1d55c31d1bd49db65a7fbbd86aab13 Patch
https://git.kernel.org/stable/c/e021a1eee196887536a6630c5492c23a4c78d452 Patch
https://git.kernel.org/stable/c/e18939176e657a3a20bfbed357b8c55a9f82aba3 Patch
https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Third Party Advisory
https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Third Party Advisory
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2025-38639 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2025-38639 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2025-38639 vulnerability anywhere in the article.

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2025-38639 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jan. 07, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Added CWE NVD-CWE-Other
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.16 up to (excluding) 6.1.148 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.11 up to (excluding) 5.15.190 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.5 up to (excluding) 5.10.241 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.16 up to (excluding) 6.16.1 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.13 up to (excluding) 6.15.10 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.12.42 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.102 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 3.3 up to (excluding) 5.4.297
    Added CPE Configuration OR *cpe:2.3:o:debian:debian_linux:11.0:*:*:*:*:*:*:*
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/58004aa21e79addaf41667bfe65e93ec51653f18 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/58007fc7b94fb2702000045ff401eb7f5bde7828 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/66d41268ede1e1b6e71ba28be923397ff0b2b9c3 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/7c1ae471da69c09242834e956218ea6a42dd405a Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/b10cfa2de13d28ddd03210eb234422b7ec92725a Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/bf58e667af7d96c8eb9411f926a0a0955f41ce21 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/df13c9c6ce1d55c31d1bd49db65a7fbbd86aab13 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/e021a1eee196887536a6630c5492c23a4c78d452 Types: Patch
    Added Reference Type kernel.org: https://git.kernel.org/stable/c/e18939176e657a3a20bfbed357b8c55a9f82aba3 Types: Patch
    Added Reference Type CVE: https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html Types: Third Party Advisory
    Added Reference Type CVE: https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html Types: Third Party Advisory
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 03, 2025

    Action Type Old Value New Value
    Added Reference https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html
    Added Reference https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 28, 2025

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/66d41268ede1e1b6e71ba28be923397ff0b2b9c3
    Added Reference https://git.kernel.org/stable/c/b10cfa2de13d28ddd03210eb234422b7ec92725a
    Added Reference https://git.kernel.org/stable/c/e021a1eee196887536a6630c5492c23a4c78d452
  • New CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Aug. 22, 2025

    Action Type Old Value New Value
    Added Description In the Linux kernel, the following vulnerability has been resolved: netfilter: xt_nfacct: don't assume acct name is null-terminated BUG: KASAN: slab-out-of-bounds in .. lib/vsprintf.c:721 Read of size 1 at addr ffff88801eac95c8 by task syz-executor183/5851 [..] string+0x231/0x2b0 lib/vsprintf.c:721 vsnprintf+0x739/0xf00 lib/vsprintf.c:2874 [..] nfacct_mt_checkentry+0xd2/0xe0 net/netfilter/xt_nfacct.c:41 xt_check_match+0x3d1/0xab0 net/netfilter/x_tables.c:523 nfnl_acct_find_get() handles non-null input, but the error printk relied on its presence.
    Added Reference https://git.kernel.org/stable/c/58004aa21e79addaf41667bfe65e93ec51653f18
    Added Reference https://git.kernel.org/stable/c/58007fc7b94fb2702000045ff401eb7f5bde7828
    Added Reference https://git.kernel.org/stable/c/7c1ae471da69c09242834e956218ea6a42dd405a
    Added Reference https://git.kernel.org/stable/c/bf58e667af7d96c8eb9411f926a0a0955f41ce21
    Added Reference https://git.kernel.org/stable/c/df13c9c6ce1d55c31d1bd49db65a7fbbd86aab13
    Added Reference https://git.kernel.org/stable/c/e18939176e657a3a20bfbed357b8c55a9f82aba3
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
Vulnerability Scoring Details
Base CVSS Score: 5.5
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact