CVE-2026-53002netfilter: conntrack: remove sprintf usage
Updated under an hour ago ()
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It affects Linux and 5 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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 [..]
- CVSS
- 9.8 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-787
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Linux
- NVD analysis
- Modified
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Linux Linux linux:linux (from the name) | 9fafcd7b203229c3f3893a475741afc27e276306 builds before 2f793ba78470a99f40389b7dc60a81d9f5ad3956; 9fafcd7b203229c3f3893a475741afc27e276306 builds before 6bbf829b4c1b44c941c47dd0d710f1393258f3d5; from 9fafcd7b203229c3f3893a475741afc27e276306 before ab64e61c9323fa6de21bd20da1ddb29a0fb65d34; 9fafcd7b203229c3f3893a475741afc27e276306 builds before 1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1e; from 9fafcd7b203229c3f3893a475741afc27e276306 before a8e0a32a23d3f34862af3b4da792ecb3a891a9a3; 9fafcd7b203229c3f3893a475741afc27e276306 builds before 8e3be0d12615a173fe260cd42753ca7a001acbf2; from 9fafcd7b203229c3f3893a475741afc27e276306 before c08ff52e44945e6ef4ce0790f49ea761b060c45b; 9fafcd7b203229c3f3893a475741afc27e276306 builds before 6e7066bdb481a87fe88c4fa563e348c03b2d373d | CNA record |
Red Hat Red Hat Enterprise Linux 8 redhat:enterprise_linux | from 0:4.18.0-553.160.1.rt7.501.el8_10 not affected | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP siemens:simatic_s7_1500_cpu_1518f_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP siemens:siplus_s7_1500_cpu_1518_4_pn_dp_mfp (from the name) | from V3.1.6 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 2.6.20 before 5.10.258; from 5.11 before 5.15.209; from 5.16 before 6.1.175; from 6.2 before 6.6.141; from 6.7 before 6.12.91; from 6.13 before 6.18.33; from 6.19 before 7.0.10 | NVD |
redhat enterprise_linux redhat:enterprise_linux | 7.0; 8.0; 9.0; 10.0 | NVD |
References
- https://git.kernel.org/stable/c/2f793ba78470a99f40389b7dc60a81d9f5ad3956patch
- https://git.kernel.org/stable/c/6bbf829b4c1b44c941c47dd0d710f1393258f3d5patch
- https://git.kernel.org/stable/c/ab64e61c9323fa6de21bd20da1ddb29a0fb65d34patch
- https://git.kernel.org/stable/c/1c9fb8aeed06790d42cdcd00f6c3ce0b9e926c1epatch
- https://git.kernel.org/stable/c/a8e0a32a23d3f34862af3b4da792ecb3a891a9a3patch
- https://git.kernel.org/stable/c/8e3be0d12615a173fe260cd42753ca7a001acbf2patch
- https://git.kernel.org/stable/c/c08ff52e44945e6ef4ce0790f49ea761b060c45bpatch
- https://git.kernel.org/stable/c/6e7066bdb481a87fe88c4fa563e348c03b2d373dpatch
- https://access.redhat.com/errata/RHSA-2026:64770
- https://access.redhat.com/errata/RHSA-2026:66000
- https://access.redhat.com/errata/RHSA-2026:66180
- https://access.redhat.com/security/cve/CVE-2026-53002third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2492329third-party-advisory
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-53002.jsonthird-party-advisory
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.