CVE-2026-74564
- Source
- https://cve.org/CVERecord?id=CVE-2026-74564
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-74564.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-74564
- Downstream
- Published
- 2026-08-15T12:28:06.392Z
- Modified
- 2026-08-18T03:56:51.974638091Z
- Severity
-
- 7.1 (High) CVSS_V3 - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- netfilter: xt_hashlimit: validate hashtable supports XT_HASHLIMIT_RATE_MATCH
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
netfilter: xthashlimit: validate hashtable supports XTHASHLIMITRATEMATCH
The XTHASHLIMITRATEMATCH flag mode changes the semantics of the dsthashent structure which represents an entry in the hashtable. There is a union area which uses a different layout to express the rate match mode.
Update .checkentry path to validate the XTHASHLIMITRATE_MATCH mode flag is requested by two or more different rules that refer to the same hashtable. Otherwise, uninitialized access to the burst field in the union is possible.
Reject the use of the XTHASHLIMITRATE_MATCH mode flag if set on by revision less than 3 too.
- Database specific
{ "cna_assigner": "Linux", "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74564.json" }- References
-
- https://git.kernel.org/stable/c/06a76334243ccd875a981aa8bb46c0f931ef1e3b
- https://git.kernel.org/stable/c/24683fea1f06bd3bd2707b99460e859bc6464c22
- https://git.kernel.org/stable/c/305b63e1402267459fdabb183af4527f6799eebf
- https://git.kernel.org/stable/c/32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0
- https://git.kernel.org/stable/c/d186f77d18bdfb252d401ff992ca3001a6a65a0f
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/74xxx/CVE-2026-74564.json
- https://nvd.nist.gov/vuln/detail/CVE-2026-74564
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedbea74641e3786d51dcf1175527cc1781420961c9Fixed24683fea1f06bd3bd2707b99460e859bc6464c22Fixed32ec8d4aba2cf22e12bdc28df8c4bd833c195fc0Fixedd186f77d18bdfb252d401ff992ca3001a6a65a0fFixed06a76334243ccd875a981aa8bb46c0f931ef1e3bFixed305b63e1402267459fdabb183af4527f6799eebf