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CVE-2024-27396— net: gtp: Fix Use-After-Free in gtp_dellink

Quick assessment

Affected
Linux Linux
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，该漏洞源于存在释放后重用问题。

CVSS 7.8 · High EPSS 0.24% · P14

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 22

VendorProduct Version RangeStatus
Linux Linux 043a283d24f40fea4c8a8d06b0e2694c8e372200< 07b20d0a3dc13fb1adff10b60021a4924498da58 affected
c185e1d6e2752a4b656c3ca878c525fa11f55757< 718df1bc226c383dd803397d7f5d95557eb81ac7 affected
94dc550a5062030569d4aa76e10e50c8fc001930< 0caff3e6390f840666b8dc1ecebf985c2ef3f1dd affected
94dc550a5062030569d4aa76e10e50c8fc001930< 2e74b3fd6bf542349758f283676dff3660327c07 affected
94dc550a5062030569d4aa76e10e50c8fc001930< 25a1c2d4b1fcf938356a9688a96a6456abd44b29 affected
94dc550a5062030569d4aa76e10e50c8fc001930< 2aacd4de45477582993f8a8abb9505a06426bfb6 affected
94dc550a5062030569d4aa76e10e50c8fc001930< cd957d1716ec979d8f5bf38fc659aeb9fdaa2474 affected
94dc550a5062030569d4aa76e10e50c8fc001930< f2a904107ee2b647bb7794a1a82b67740d7c8a64 affected
… +14 more rows
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I. Basic Information for CVE-2024-27396

Vulnerability Information
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Vulnerability Title
net: gtp: Fix Use-After-Free in gtp_dellink
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: gtp: Fix Use-After-Free in gtp_dellink Since call_rcu, which is called in the hlist_for_each_entry_rcu traversal of gtp_dellink, is not part of the RCU read critical section, it is possible that the RCU grace period will pass during the traversal and the key will be free. To prevent this, it should be changed to hlist_for_each_entry_safe.
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
N/A
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，该漏洞源于存在释放后重用问题。
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 043a283d24f40fea4c8a8d06b0e2694c8e372200 ~ 07b20d0a3dc13fb1adff10b60021a4924498da58 -
Linux Linux 5.5 -

II. Public POCs for CVE-2024-27396

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III. Intelligence Information for CVE-2024-27396

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Mailing List Discussions for CVE-2024-27396 (2)

Other References for CVE-2024-27396 (8)

Same Patch Batch · Linux · 2024-05-09 · 6 CVEs total

CVE-2023-52654 7.8 HIGH io_uring/af_unix: disable sending io_uring over sockets
CVE-2024-27394 7.8 HIGH tcp: Fix Use-After-Free in tcp_ao_connect_init
CVE-2024-27395 7.8 HIGH net: openvswitch: Fix Use-After-Free in ovs_ct_exit
CVE-2024-27397 7.8 HIGH netfilter: nf_tables: use timestamp to check for set element timeout
CVE-2024-27393 7.5 HIGH xen-netfront: Add missing skb_mark_for_recycle

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

V. Comments for CVE-2024-27396

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