CVE-2026-23391netfilter: xt_CT: drop pending enqueued packets on template removal
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: xt_CT: drop pending enqueued packets on template removal Templates refer to objects that can go away while packets are sitting in nfqueue refer to: - helper, this can be an issue on module removal. - timeout policy, nfnetlink_cttimeout might remove it. The use of templates with zone and event cache filter are safe, since this just copies values. Flush these enqueued packets in case the template rule gets removed.
- CVSS
- 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- Not given
- 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) | from 24de58f465165298aaa8f286b2592f0163706cfe before 55445134d42b84cb0a272e42c98d233ca65eca83; from 24de58f465165298aaa8f286b2592f0163706cfe before cc57506dd66555899560b9c0f24e813f034e12ec; from 24de58f465165298aaa8f286b2592f0163706cfe before d2d0bae0c9a2a17b6990a2966f5cdce0813d6256; from 24de58f465165298aaa8f286b2592f0163706cfe before 63b8097cea1923fe82cd598068d0796da8c015ec; 24de58f465165298aaa8f286b2592f0163706cfe builds before 19a230dec6bb8928e3f96387f9085cf2c79bcef9; from 24de58f465165298aaa8f286b2592f0163706cfe before cb549925875fa06dd155e49db4ac2c5044c30f9c; from 24de58f465165298aaa8f286b2592f0163706cfe before 777d02efe3d630cca4c1b63962cec17c57711325; from 24de58f465165298aaa8f286b2592f0163706cfe before f62a218a946b19bb59abdd5361da85fa4606b96b | CNA record |
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 SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | all versions | 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 3.4.1 before 5.10.253; from 5.11 before 5.15.203; from 5.16 before 6.1.167; from 6.2 before 6.6.130; from 6.7 before 6.12.78; from 6.13 before 6.18.20; from 6.19 before 6.19.10; 3.4; and 7 more ranges | NVD |
References
- https://git.kernel.org/stable/c/55445134d42b84cb0a272e42c98d233ca65eca83patch
- https://git.kernel.org/stable/c/cc57506dd66555899560b9c0f24e813f034e12ecpatch
- https://git.kernel.org/stable/c/d2d0bae0c9a2a17b6990a2966f5cdce0813d6256patch
- https://git.kernel.org/stable/c/63b8097cea1923fe82cd598068d0796da8c015ecpatch
- https://git.kernel.org/stable/c/19a230dec6bb8928e3f96387f9085cf2c79bcef9patch
- https://git.kernel.org/stable/c/cb549925875fa06dd155e49db4ac2c5044c30f9cpatch
- https://git.kernel.org/stable/c/777d02efe3d630cca4c1b63962cec17c57711325patch
- https://git.kernel.org/stable/c/f62a218a946b19bb59abdd5361da85fa4606b96bpatch
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html
- https://cert-portal.siemens.com/productcert/html/ssa-784472.html
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.