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CVE-2023-1281— UAF in Linux kernel's tcindex (traffic control index filter) implementation

Quick assessment

Affected
Linux Linux Kernel
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存在资源管理错误漏洞，该漏洞源于 traffic control index filter (tcindex)存在安全问题，在使用已销毁的 tcf_ext 时调用 tcf_exts_exec()，导致释放后重用，攻击者利用该漏洞可以将其权限提升为 root。

CVSS 7.8 · High EPSS 0.30% · P21

Affected Version Matrix 5

VendorProduct Version RangeStatus
Linux Linux Kernel 4.14.0< 5.10.169 affected
5.11.0< 5.15.95 affected
5.16.0< 6.1.13 affected
6.2.0 unaffected
ee059170b1f7e94e55fa6cadee544e176a6e59c2 unaffected
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I. Basic Information for CVE-2023-1281

Vulnerability Information
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Vulnerability Title
UAF in Linux kernel's tcindex (traffic control index filter) implementation
Source: CVE Program / CVE List V5
Vulnerability Description
Use After Free vulnerability in Linux kernel traffic control index filter (tcindex) allows Privilege Escalation. The imperfect hash area can be updated while packets are traversing, which will cause a use-after-free when 'tcf_exts_exec()' is called with the destroyed tcf_ext. A local attacker user can use this vulnerability to elevate its privileges to root. This issue affects Linux Kernel: from 4.14 before git commit ee059170b1f7e94e55fa6cadee544e176a6e59c2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
释放后使用
Source: CVE Program / CVE List V5
Vulnerability Title
Linux kernel 资源管理错误漏洞
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存在资源管理错误漏洞，该漏洞源于 traffic control index filter (tcindex)存在安全问题，在使用已销毁的 tcf_ext 时调用 tcf_exts_exec()，导致释放后重用，攻击者利用该漏洞可以将其权限提升为 root。
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
Linux Linux Kernel 4.14.0 ~ 5.10.169 cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2023-1281

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III. Intelligence Information for CVE-2023-1281

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Patches & Fixes for CVE-2023-1281 (1)

Vendor Advisories for CVE-2023-1281 (1)

Mailing List Discussions for CVE-2023-1281 (3)

Other References for CVE-2023-1281 (1)

IV. Related Vulnerabilities

Same product: Linux Kernel
Same vendor: Linux
Same weakness: CWE-416

V. Comments for CVE-2023-1281

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