CVE-2026-53002

netfilter: conntrack: remove sprintf usage

EPSS 0.2%

Vexday Risk Score

3Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS —EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

24 Jun 2026Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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 [..]

Affected products

Linux · Linux

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References

https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956 https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5 https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373d https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2 https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3 https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34 https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45b