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High 8.1Published Feb 27, 2025
CVE-2025-21766ipv4: use RCU protection in __ip_rt_update_pmtu()
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: ipv4: use RCU protection in __ip_rt_update_pmtu() __ip_rt_update_pmtu() must use RCU protection to make sure the net structure it reads does not disappear.
- CVSS
- 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/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 15, 2026
- First seen by InfoSec Signals
- Oct 15, 2026
Affected products
Linux Linux linux:linux (from the name) | from 2fbc6e89b2f1403189e624cabaf73e189c5e50c6 before ce3c6165fce0f06305c806696882a3ad4b90e33f; from 2fbc6e89b2f1403189e624cabaf73e189c5e50c6 before ea07480b23225942208f1b754fea1e7ec486d37e; from 2fbc6e89b2f1403189e624cabaf73e189c5e50c6 before 9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4; from 2fbc6e89b2f1403189e624cabaf73e189c5e50c6 before 4583748b65dee4d61bd50a2214715b4237bc152a; from 2fbc6e89b2f1403189e624cabaf73e189c5e50c6 before a39f61d212d822b3062d7f70fa0588e50e55664e; from 2fbc6e89b2f1403189e624cabaf73e189c5e50c6 before 139512191bd06f1b496117c76372b2ce372c9a41; f415c264176e6095e9dee823e09c5bdd0ee0d337; 98776a365da509ad923083ae54b38ee521c52742; and 6 more ranges | 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 V3.1.5 | 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 V3.1.5 | 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 V3.1.5 | CISA ADP |
linux linux_kernel linux:linux_kernel | from 4.14.200 before 4.15; from 4.19.148 before 4.20; from 5.4.68 before 5.5; from 5.8.12 before 5.9; from 5.9.1 before 5.15.179; from 5.16 before 6.1.129; from 6.2 before 6.6.79; from 6.7 before 6.12.16; and 6 more ranges | NVD |
References
- https://git.kernel.org/stable/c/ce3c6165fce0f06305c806696882a3ad4b90e33fpatch
- https://git.kernel.org/stable/c/ea07480b23225942208f1b754fea1e7ec486d37epatch
- https://git.kernel.org/stable/c/9b1766d1ff5fe496aabe9fc5f4e34e53f35c11c4patch
- https://git.kernel.org/stable/c/4583748b65dee4d61bd50a2214715b4237bc152apatch
- https://git.kernel.org/stable/c/a39f61d212d822b3062d7f70fa0588e50e55664epatch
- https://git.kernel.org/stable/c/139512191bd06f1b496117c76372b2ce372c9a41patch
- https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html
- https://cert-portal.siemens.com/productcert/html/ssa-082556.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.