CVE-2023-52581
netfilter: nf_tables: fix memleak when more than 255 elements expired
- Published
- Last modified
- Where the record stands: published, rejected by its publisher, or superseded by another id.What do these mean? →
- published
- Whether CISA lists it in its Known Exploited Vulnerabilities catalog: proof that attackers are using it.What do these mean? →
- Not listed in CISA KEV
- Fix
- Fixed in 6.5
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
CISA's decision points: whether it is exploited, whether attacks can be automated, and how much control an attacker gets. Assessed (SSVC 2.0.3).What do these mean? →
- Exploitation: none
- Automatable: no
- Technical impact: partial
Summary
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.
Timeline
- CVE published
- CISA SSVC assessment
Exploitation: none · Automatable: no · Technical impact: partial
- Record last updated
Affected versions
- Linux Linux
From 6.4.11 · fixed in 6.5
- Linux Linux
6.5
References 7
git.kernel.org
- stable/c/7cf055b43756b10aa2b851c927c940f5ed652125
- stable/c/a995a68e8a3b48533e47c856865d109a1f1a9d01
- stable/c/09c85f2d21ab6b5acba31a037985b13e8e6565b8
- stable/c/ef99506eaf1dc31feff1adfcfd68bc5535a22171
- stable/c/7e5d732e6902eb6a37b35480796838a145ae5f07
- stable/c/4aea243b6853d06c1d160a9955b759189aa02b14
- stable/c/cf5000a7787cbc10341091d37245a42c119d26c5