CVE-2025-38639
Unknown Unknown - Not Provided
BaseFortify

Publication date: 2025-08-22

Last updated on: 2025-11-03

Assigner: kernel.org

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.
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Meta Information
Published
2025-08-22
Last Modified
2025-11-03
Generated
2026-05-06
AI Q&A
2025-08-22
EPSS Evaluated
2026-05-05
NVD
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
linux linux_kernel 5.10.244
linux linux_kernel 6.1.153
Helpful Resources
Exploitability
CWE
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CWE ID Description
CWE-UNKNOWN
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AI Powered Q&A
Can you explain this vulnerability to me?

This vulnerability in the Linux kernel's netfilter component (xt_nfacct) involves an assumption that an account name is null-terminated, which is incorrect. This leads to a slab-out-of-bounds read error detected by KASAN, causing a read of memory beyond the intended buffer in the function lib/vsprintf.c. The issue arises because the error handling code relies on the presence of a null-terminated string, but the function nfnl_acct_find_get() can handle non-null input, leading to unsafe memory access.


How can this vulnerability impact me? :

This vulnerability can lead to out-of-bounds memory reads in the Linux kernel, which may cause system instability, crashes, or potentially allow an attacker to leak sensitive information from kernel memory. It could be exploited to compromise system security or cause denial of service.


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