CVE-2026-72066: linux Classic Buffer Overflow
CVSS: 7.8v3.1HighReceived
AliasesUBUNTU-CVE-2026-72066DEBIAN-CVE-2026-72066
Published 15-08-2026Last modified 19-10-2026
Vulnerability summary
CVE-2026-72066 is a high (CVSS 7.8) Classic Buffer Overflow vulnerability in linux. EPSS estimates a 0.18% chance of exploitation in the next 30 days, higher than 6.7% of scored vulnerabilities.
CVSS score
7.8/10
010
High · v3.1 (CVE.org)EPSS score
0.18%
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 28 · Related 28OPENSUSE-SU-2026:22091-1SUSE-SU-2026:24179-1SUSE-SU-2026:24181-1SUSE-SU-2026:24182-1SUSE-SU-2026:24184-1SUSE-SU-2026:4640-1SUSE-SU-2026:4660-1SUSE-SU-2026:4665-1SUSE-SU-2026:4666-1SUSE-SU-2026:4667-1SUSE-SU-2026:4668-1SUSE-SU-2026:4687-1SUSE-SU-2026:4706-1USN-8875-1USN-8875-2USN-8876-1USN-8877-1USN-8878-1USN-8879-1USN-8886-1USN-8887-1USN-8887-2USN-8887-3USN-8888-1USN-8888-2USN-8889-1USN-8917-1USN-8918-1
Timeline
- 15-08-2026PublishedVulnerability first disclosed.
- 19-10-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: cpu: hotplug: Bound hotplug states sysfs output states_show() adds CPU hotplug state names into a single sysfs buffer using sprintf(). With enough registered states, this can write past the end of the PAGE_SIZE buffer. Use sysfs_emit_at() so output is bounded.
CVSS metrics
5 scores · 4 sources · 2 versionsMedium 5.8Preferred score · OSV · Ubuntu (Ecosystem advisory) · calculated from vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:NSourcesSingle source
High 7.8Preferred score · CVE.org (CNA)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:HSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- OSV · DebianEcosystem advisory · calculated7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVDNIST7.8HighCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS trend
Probability
0.18%
Chance of exploitation in the next 30 days
Percentile
7%
Versus all other CVEs
30-day change
0.00 pp
From 0.18% on 21-09-2026
21-09-202621-10-2026
EPSS score0.18%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu168 products
- linuxAll versions (No fix recorded) | < 5.15.0-198.208 | < 6.8.0-147.147 | < 7.0.0-38.38
- linux-allwinner-5.19All versions (No fix recorded)
- linux-awsAll versions (No fix recorded) | < 5.15.0-1117.124 | < 6.8.0-1067.70 | < 7.0.0-1014.14
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian1 product
- linux< 6.1.180-1 | < 6.12.100-1 | < 7.1.5-1
Linux1 product
- linux≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < 27481cf4365a6ff5c9be3590143e7ed434000266 | ≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < 2408be459c70ef4250da1a9e50f5478e6b250d61 | ≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < de4d3d8ae17dc8b4cf8c59436c4b7e2dc2491635 | ≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < 998f66e9ce320f3433f60b948e3698b744754a46 | ≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < 61a73a123ac7a7fbc57382531f8cb7092d569aba | ≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < 6cb15b81ff545840048fb0e1a6e827d560dbf367 | ≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < 631d53102da9f469c96b882b770336bec095b833 | ≥ 98f8cdce1db580b99fce823a48eea2cb2bdb261e, < 86f436567f2516a0083b210bedc933544826a2c3 | 4.6
3 vendors · 170 products
