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CVE-2024-0646— Kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination

Quick assessment

Affected
CVE-2024-0646
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在越界内存写入问题，允许本地用户导致系统崩溃或提升权限。

CVSS 7.0 · High EPSS 0.31% · P21

Affected Version Matrix 49

VendorProduct Version RangeStatus
None None < 6.7-rc5 affected
Red Hat Red Hat Enterprise Linux 6 any unaffected
Red Hat Red Hat Enterprise Linux 7 any unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 8 0:4.18.0-513.18.1.rt7.320.el8_9< * unaffected
any unaffected
0:4.18.0-513.18.1.el8_9< * unaffected
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:4.18.0-193.128.1.el8_2< * unaffected
Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service 0:4.18.0-193.128.1.rt13.179.el8_2< * unaffected
0:4.18.0-193.128.1.el8_2< * unaffected
Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions 0:4.18.0-193.128.1.el8_2< * unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.125.1.el8_4< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:4.18.0-305.125.1.rt7.201.el8_4< * unaffected
0:4.18.0-305.125.1.el8_4< * unaffected
Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:4.18.0-305.125.1.el8_4< * unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support 0:4.18.0-372.91.1.el8_6< * unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support any unaffected
0:4.18.0-477.51.1.el8_8< * unaffected
Red Hat Red Hat Enterprise Linux 9 0:5.14.0-362.24.1.el9_3< * unaffected
0:5.14.0-362.24.1.el9_3< * unaffected
any unaffected
any affected
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.93.2.el9_0< * unaffected
0:5.14.0-70.93.1.rt21.165.el9_0< * unaffected
any unaffected
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:5.14.0-284.52.1.el9_2< * unaffected
0:5.14.0-284.52.1.rt14.337.el9_2< * unaffected
any unaffected
Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 0:4.18.0-372.91.1.el8_6< * unaffected
Red Hat RHOL-5.8-RHEL-9 v5.8.6-22< * unaffected
v5.8.6-11< * unaffected
v6.8.1-407< * unaffected
v5.8.6-19< * unaffected
v1.0.0-479< * unaffected
v5.8.6-7< * unaffected
v0.4.0-247< * unaffected
v5.8.6-5< * unaffected
… +9 more rows

I. Basic Information for CVE-2024-0646

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
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Vulnerability Title
Kernel: ktls overwrites readonly memory pages when using function splice with a ktls socket as destination
Source: CVE Program / CVE List V5
Vulnerability Description
An out-of-bounds memory write flaw was found in the Linux kernel’s Transport Layer Security functionality in how a user calls a function splice with a ktls socket as the destination. This flaw allows a local user to crash or potentially escalate their privileges on the system.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
跨界内存写
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Linux kernel是美国Linux基金会的开源操作系统Linux所使用的内核。 Linux kernel存在安全漏洞，该漏洞源于存在越界内存写入问题，允许本地用户导致系统崩溃或提升权限。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- - 0 ~ 6.7-rc5 -
Red Hat Red Hat Enterprise Linux 8 0:4.18.0-513.18.1.rt7.320.el8_9 ~ * cpe:/a:redhat:enterprise_linux:8::nfv
Red Hat Red Hat Enterprise Linux 8 - cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat Red Hat Enterprise Linux 8 0:4.18.0-513.18.1.el8_9 ~ * cpe:/a:redhat:enterprise_linux:8::crb
Red Hat Red Hat Enterprise Linux 8.2 Advanced Update Support 0:4.18.0-193.128.1.el8_2 ~ * cpe:/o:redhat:rhel_aus:8.2::baseos
Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service 0:4.18.0-193.128.1.rt13.179.el8_2 ~ * cpe:/a:redhat:rhel_tus:8.2::nfv
Red Hat Red Hat Enterprise Linux 8.2 Telecommunications Update Service 0:4.18.0-193.128.1.el8_2 ~ * cpe:/o:redhat:rhel_aus:8.2::baseos
Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions 0:4.18.0-193.128.1.el8_2 ~ * cpe:/o:redhat:rhel_aus:8.2::baseos
Red Hat Red Hat Enterprise Linux 8.2 Update Services for SAP Solutions - cpe:/o:redhat:rhel_e4s:8.2::baseos
Red Hat Red Hat Enterprise Linux 8.4 Advanced Mission Critical Update Support 0:4.18.0-305.125.1.el8_4 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:4.18.0-305.125.1.rt7.201.el8_4 ~ * cpe:/a:redhat:rhel_tus:8.4::nfv
Red Hat Red Hat Enterprise Linux 8.4 Telecommunications Update Service 0:4.18.0-305.125.1.el8_4 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions 0:4.18.0-305.125.1.el8_4 ~ * cpe:/o:redhat:rhel_aus:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.4 Update Services for SAP Solutions - cpe:/o:redhat:rhel_e4s:8.4::baseos
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support 0:4.18.0-372.91.1.el8_6 ~ * cpe:/a:redhat:rhel_eus:8.6::crb
Red Hat Red Hat Enterprise Linux 8.6 Extended Update Support - cpe:/o:redhat:rhel_eus:8.6::baseos
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support - cpe:/o:redhat:rhel_eus:8.8::baseos
Red Hat Red Hat Enterprise Linux 8.8 Extended Update Support 0:4.18.0-477.51.1.el8_8 ~ * cpe:/a:redhat:rhel_eus:8.8::crb
Red Hat Red Hat Enterprise Linux 9 0:5.14.0-362.24.1.el9_3 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 0:5.14.0-362.24.1.el9_3 ~ * cpe:/a:redhat:enterprise_linux:9::appstream
Red Hat Red Hat Enterprise Linux 9 - cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.93.2.el9_0 ~ * cpe:/a:redhat:rhel_eus:9.0::appstream
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support 0:5.14.0-70.93.1.rt21.165.el9_0 ~ * cpe:/a:redhat:rhel_eus:9.0::nfv
Red Hat Red Hat Enterprise Linux 9.0 Extended Update Support - cpe:/o:redhat:rhel_eus:9.0::baseos
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:5.14.0-284.52.1.el9_2 ~ * cpe:/a:redhat:rhel_eus:9.2::appstream
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support 0:5.14.0-284.52.1.rt14.337.el9_2 ~ * cpe:/a:redhat:rhel_eus:9.2::nfv
Red Hat Red Hat Enterprise Linux 9.2 Extended Update Support - cpe:/o:redhat:rhel_eus:9.2::baseos
Red Hat Red Hat Virtualization 4 for Red Hat Enterprise Linux 8 0:4.18.0-372.91.1.el8_6 ~ * cpe:/a:redhat:rhel_eus:8.6::crb
Red Hat RHOL-5.8-RHEL-9 v5.8.6-22 ~ * cpe:/a:redhat:logging:5.8::el9
Red Hat RHOL-5.8-RHEL-9 v5.8.6-11 ~ * cpe:/a:redhat:logging:5.8::el9

II. Public POCs for CVE-2024-0646

# POC Description Source Link Shenlong Link
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III. Intelligence Information for CVE-2024-0646

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Patches & Fixes for CVE-2024-0646 (1)

Vendor Advisories for CVE-2024-0646 (21)

Mailing List Discussions for CVE-2024-0646 (1)

IV. Related Vulnerabilities

Same weakness: CWE-787

V. Comments for CVE-2024-0646

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