Bug 2390363 (CVE-2025-38639) - CVE-2025-38639 kernel: netfilter: xt_nfacct: don't assume acct name is null-terminated
Summary: CVE-2025-38639 kernel: netfilter: xt_nfacct: don't assume acct name is null-t...
Keywords:
Status: NEW
Alias: CVE-2025-38639
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2025-08-22 17:02 UTC by OSIDB Bzimport
Modified: 2025-08-25 08:46 UTC (History)
0 users

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Description OSIDB Bzimport 2025-08-22 17:02:46 UTC 
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.
Comment 1 Alexander B 2025-08-25 08:36:18 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2025082234-CVE-2025-38639-f972@gregkh/T
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