Use After Free in Linux Kernel
CVE-2022-2586
It was discovered that a nft object or expression could reference a nft set on a different nft table, leading to a use-after-free once that table was deleted.
Vulnerability class: Use-After-Free
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.102 (95.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 95.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.105 · newest: 0.102 · change: -0.003
Affected products
- Linux Kernel — versions 6.0
- Siemens Simatic S7-1500 Tm Mfp Firmware
- Siemens Sinec OS
- The Linux Kernel Organization — versions 0
- Canonical Ubuntu Linux — versions 14.04, 16.04, 18.04
Weakness classification (CWE)
CISA KEV (Known Exploited Vulnerabilities)
This CVE is on the CISA KEV catalog, added on . CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.
BOD 22-01 due date: .
Required action: Apply updates per vendor instructions or discontinue use of the product if updates are unavailable.
Public proof-of-concept exploits
References
- ubuntu.com/security/notices/USN-5564-1 (Third Party Advisory, third-party-advisory)
- ubuntu.com/security/notices/USN-5560-2 (Third Party Advisory, third-party-advisory)
- ubuntu.com/security/notices/USN-5582-1 (Third Party Advisory, third-party-advisory)
- ubuntu.com/security/notices/USN-5567-1 (Third Party Advisory, third-party-advisory)
- ubuntu.com/security/notices/USN-5560-1 (Third Party Advisory, third-party-advisory)
- ubuntu.com/security/notices/USN-5566-1 (Third Party Advisory, third-party-advisory)
- www.openwall.com/lists/oss-security/2022/08/09/5 (issue-tracking, Mailing List)
- ubuntu.com/security/notices/USN-5565-1 (Third Party Advisory, third-party-advisory)
- www.zerodayinitiative.com/advisories/ZDI-22-1118/ (issue-tracking, VDB Entry, Third Party Advisory)
- lore.kernel.org/netfilter-devel/20220809170148.164591-1-cascardo@canonical.com/… (issue-tracking, Patch, Mailing List)
Frequently asked questions
- What is CVE-2022-2586?
- CVE-2022-2586 is a medium-severity vulnerability in Linux Kernel, classified under Use After Free. CVSS score: 5.3/10. Published 2024-01-08.
- How severe is CVE-2022-2586?
- Medium severity. CVSS v3 base score is 5.3 out of 10.
- Is CVE-2022-2586 known to be exploited?
- Yes. CVE-2022-2586 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-06-26), indicating it is being actively exploited. 50 public proof-of-concept repositories are indexed.