CVE-2023-53209: linux NULL Pointer Dereference
CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2023-53209DEBIAN-CVE-2023-53209
Published 15-09-2025Last modified 11-05-2026
Vulnerability summary
CVE-2023-53209 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.16% chance of exploitation in the next 30 days, higher than 4.4% of scored vulnerabilities.
CVSS score
5.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.16%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 11 · Related 10Timeline
- 15-09-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: wifi: mac80211_hwsim: Fix possible NULL dereference In a call to mac80211_hwsim_select_tx_link() the sta pointer might be NULL, thus need to check that it is not NULL before accessing it.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 6.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:NSourcesSingle source
Medium 5.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- NVDNIST5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.16%
Chance of exploitation in the next 30 days
Percentile
4%
Versus all other CVEs
30-day change
0.00 pp
From 0.15% on 21-09-2026
21-09-202621-10-2026
EPSS score0.16%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu124 products
- linuxAll versions (No fix recorded)
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded)
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 86e74a08fecb59985bb2d5fe3e96dc108822a420, < d0124848c7940aba73492e282506b32a13f2e30e | ≥ 86e74a08fecb59985bb2d5fe3e96dc108822a420, < a8a20fed3e05b3a6866c5c58855deaf3c217ccd6 | ≥ 86e74a08fecb59985bb2d5fe3e96dc108822a420, < 0cc80943ef518a1c51a1111e9346d1daf11dd545 | 6.1
- linux_kernel< 6.1.42 | ≥ 6.2, < 6.4.7
Debian1 product
- linux< 6.1.52-1 | < 6.4.11-1
3 vendors · 127 products
