SARA / Free Tools / CVE / CVE-2023-3773

CVE-2023-3773 — A flaw was found in the Linux kernel’s IP framework for transforming packets (XF

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 lea

CVSS
5.5 MEDIUM
EPSS
2.00% (top 96.00%)
CWE
CWE-125
Published
2023-07-25T15:47:40.391Z
Last modified
2025-11-14T14:21:06.184Z
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

01What is this vulnerability?

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.

02Affected products

VendorProductVersions
Red HatRed Hat Enterprise Linux 90:5.14.0-362.8.1.el9_3
Red HatRed Hat Enterprise Linux 90:5.14.0-362.8.1.el9_3
Red HatRed Hat Enterprise Linux 6unspecified
Red HatRed Hat Enterprise Linux 7unspecified
Red HatRed Hat Enterprise Linux 7unspecified
Red HatRed Hat Enterprise Linux 8unspecified
Red HatRed Hat Enterprise Linux 8unspecified
Red HatRed Hat Enterprise Linux 9unspecified

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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