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CVE-2024-27395— net: openvswitch: Fix Use-After-Free in ovs_ct_exit

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

T1068 · Exploitation for Privilege Escalation

Affected Version Matrix 18

VendorProduct Version RangeStatus
Linux Linux 11efd5cb04a184eea4f57b68ea63dddd463158d1< 2db9a8c0a01fa1c762c1e61a13c212c492752994 affected
11efd5cb04a184eea4f57b68ea63dddd463158d1< 589523cf0b384164e445dd5db8d5b1bf97982424 affected
11efd5cb04a184eea4f57b68ea63dddd463158d1< 35880c3fa6f8fe281a19975d2992644588ca33d3 affected
11efd5cb04a184eea4f57b68ea63dddd463158d1< 9048616553c65e750d43846f225843ed745ec0d4 affected
11efd5cb04a184eea4f57b68ea63dddd463158d1< bca6fa2d9a9f560e6b89fd5190b05cc2f5d422c1 affected
11efd5cb04a184eea4f57b68ea63dddd463158d1< eaa5e164a2110d2fb9e16c8a29e4501882235137 affected
11efd5cb04a184eea4f57b68ea63dddd463158d1< edee0758747d7c219e29db9ed1d4eb33e8d32865 affected
11efd5cb04a184eea4f57b68ea63dddd463158d1< 5ea7b72d4fac2fdbc0425cd8f2ea33abe95235b2 affected
… +10 more rows
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I. Basic Information for CVE-2024-27395

Vulnerability Information
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Vulnerability Title
net: openvswitch: Fix Use-After-Free in ovs_ct_exit
Source: CVE Program / CVE List V5
Vulnerability Description
In the Linux kernel, the following vulnerability has been resolved: net: openvswitch: Fix Use-After-Free in ovs_ct_exit Since kfree_rcu, which is called in the hlist_for_each_entry_rcu traversal of ovs_ct_limit_exit, 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 11efd5cb04a184eea4f57b68ea63dddd463158d1 ~ 2db9a8c0a01fa1c762c1e61a13c212c492752994 -
Linux Linux 4.18 -

II. Public POCs for CVE-2024-27395

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III. Intelligence Information for CVE-2024-27395

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Patches & Fixes for CVE-2024-27395 (1)

Mailing List Discussions for CVE-2024-27395 (2)

Other References for CVE-2024-27395 (7)

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-2024-27396 7.8 HIGH net: gtp: Fix Use-After-Free in gtp_dellink
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-2024-27395

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