Bug 2492329 (CVE-2026-53002) - CVE-2026-53002 kernel: netfilter: conntrack: remove sprintf usage
Summary: CVE-2026-53002 kernel: netfilter: conntrack: remove sprintf usage
Keywords:
Status: NEW
Alias: CVE-2026-53002
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-06-24 18:06 UTC by OSIDB Bzimport
Modified: 2026-06-25 18:51 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Description OSIDB Bzimport 2026-06-24 18:06:07 UTC 
In the Linux kernel, the following vulnerability has been resolved:

netfilter: conntrack: remove sprintf usage

Replace it with scnprintf, the buffer sizes are expected to be large enough
to hold the result, no need for snprintf+overflow check.

Increase buffer size in mangle_content_len() while at it.

BUG: KASAN: stack-out-of-bounds in vsnprintf+0xea5/0x1270
Write of size 1 at addr [..]
 vsnprintf+0xea5/0x1270
 sprintf+0xb1/0xe0
 mangle_content_len+0x1ac/0x280
 nf_nat_sdp_session+0x1cc/0x240
 process_sdp+0x8f8/0xb80
 process_invite_request+0x108/0x2b0
 process_sip_msg+0x5da/0xf50
 sip_help_tcp+0x45e/0x780
 nf_confirm+0x34d/0x990
 [..]
Comment 1 Keith Grant 2026-06-25 18:46:00 UTC 
Upstream advisory:
https://lore.kernel.org/linux-cve-announce/2026062447-CVE-2026-53002-8577@gregkh/T
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