CVE-2023-52581

low-risk
Published 2024-03-02

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: fix memleak when more than 255 elements expired When more than 255 elements expired we're supposed to switch to a new gc container structure. This never happens: u8 type will wrap before reaching the boundary and nft_trans_gc_space() always returns true. This means we recycle the initial gc container structure and lose track of the elements that came before. While at it, don't deref 'gc' after we've passed it to call_rcu.

Do I need to act?

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0.01% chance of exploitation
EPSS score — low exploit probability
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Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
6
CVSS 6.3/10 Medium
LOCAL / HIGH complexity

Affected Products (3)

Affected Vendors

Linux

References (14)

Patch https://git.kernel.org/stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8
Patch https://git.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14
Patch https://git.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125
Patch https://git.kernel.org/stable/c/7e5d732e6902eb6a37b35480796838a145ae5f07
Patch https://git.kernel.org/stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01
Patch https://git.kernel.org/stable/c/cf5000a7787cbc10341091d37245a42c119d26c5
Patch https://git.kernel.org/stable/c/ef99506eaf1dc31feff1adfcfd68bc5535a22171
Patch https://git.kernel.org/stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8
Patch https://git.kernel.org/stable/c/4aea243b6853d06c1d160a9955b759189aa02b14
Patch https://git.kernel.org/stable/c/7cf055b43756b10aa2b851c927c940f5ed652125
Patch https://git.kernel.org/stable/c/7e5d732e6902eb6a37b35480796838a145ae5f07
Patch https://git.kernel.org/stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01
Patch https://git.kernel.org/stable/c/cf5000a7787cbc10341091d37245a42c119d26c5
Patch https://git.kernel.org/stable/c/ef99506eaf1dc31feff1adfcfd68bc5535a22171
25
/ 100
low-risk
Severity 16/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 9/34 · Low