High severity · published Sep 6, 2023
CVE-2023-4015
Use-after-free in Linux kernel's netfilter: nf_tables component
7.8
CVSS
0.3%
EPSS
No
On KEV
Description
A use-after-free vulnerability in the Linux kernel's netfilter: nf_tables component can be exploited to achieve local privilege escalation.
On an error when building a nftables rule, deactivating immediate expressions in nft_immediate_deactivate() can lead unbinding the chain and objects be deactivated but later used.
We recommend upgrading past commit 0a771f7b266b02d262900c75f1e175c7fe76fec2.
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Attack vector
Local
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 22% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KE
Kernel · Linux
6.4 before 6.5 · source: vendor, NVD
DL
Debian Linux · Debian
12.0 · source: NVD
SS
SIMATIC S7-1500 TM MFP - GNU/Linux subsystem · Siemens
before V1.1 · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2023-4015
CVE.org
https://www.cve.org/CVERecord?id=CVE-2023-4015
Issue Tracking
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=0a771f7b266b02d262900c75f1e175c7fe76fec2
Patch
https://kernel.dance/0a771f7b266b02d262900c75f1e175c7fe76fec2
Third Party Advisory
https://www.debian.org/security/2023/dsa-5492
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-794697.html
cert-portal.siemens.com
https://cert-portal.siemens.com/productcert/html/ssa-831302.html
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