CVE-2023-3773Kernel: xfrm: out-of-bounds read of xfrma_mtimer_thresh nlattr
Updated under an hour ago ()
Does this affect you?
It affects Red Hat Enterprise Linux 9 and 4 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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Free account, 1 product
A flaw was found in the Linux kernel’s IP framework for transforming packets (XFRM subsystem). This issue may allow a malicious user with CAP_NET_ADMIN privileges to cause a 4 byte out-of-bounds read of XFRMA_MTIMER_THRESH when parsing netlink attributes, leading to potential leakage of sensitive heap data to userspace.
- CVSS
- 5.5 MEDIUM (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- Weakness (CWE)
- CWE-125
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Modified
- Record last updated
- Oct 14, 2026
- First seen by InfoSec Signals
- Oct 14, 2026
Affected products
Red Hat Red Hat Enterprise Linux 9 redhat:enterprise_linux | from 0:5.14.0-362.8.1.el9_3 not affected | CNA record |
Siemens SIMATIC S7-1500 TM MFP - GNU/Linux subsystem siemens:simatic_s7_1500_tm_mfp_gnu_linux_subsystem (from the name) | before V1.1 | CISA ADP |
redhat enterprise_linux redhat:enterprise_linux | 8.0; 9.0 | NVD |
fedoraproject fedora fedoraproject:fedora | all versions | NVD |
linux linux_kernel linux:linux_kernel | all versions | NVD |
debian debian_linux debian:debian_linux | 10.0; 12.0 | NVD |
References
- https://access.redhat.com/errata/RHSA-2023:6583vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2023-3773vdb-entry, x-refsource-redhat, third-party-advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=2218944issue-tracking, x-refsource-redhat, third-party-advisory
- https://lists.debian.org/debian-lts-announce/2023/10/msg00027.html
- https://www.debian.org/security/2023/dsa-5492
- https://cert-portal.siemens.com/productcert/html/ssa-794697.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.