CVE-2023-6931: Out-of-bounds write in Linux kernel's Performance Events system component
Vulnerability summary
CVE-2023-6931 is a high (CVSS 7.8) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.71% chance of exploitation in the next 30 days, higher than 53.7% of scored vulnerabilities.
Not severe (CVSS 7.8, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 66 · Related 53Timeline
- 19-12-2023PublishedVulnerability first disclosed.
- 14-10-2026Last modifiedVulnerability information updated.
Description
A heap out-of-bounds write vulnerability in the Linux kernel's Performance Events system component can be exploited to achieve local privilege escalation. A perf_event's read_size can overflow, leading to an heap out-of-bounds increment or write in perf_read_group(). We recommend upgrading past commit 382c27f4ed28f803b1f1473ac2d8db0afc795a1b.
CVSS metrics
4 scores · 4 sources · 1 version- OSV · UbuntuEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- OSV · DebianEcosystem advisory · calculated7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
- NVDNIST7.0HighCVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HDiffers
EPSS trend
Probability
0.71%
Chance of exploitation in the next 30 days
Percentile
54%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.71% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu114 products
- linux< 4.4.0-250.284 | < 4.15.0-221.232 | < 5.4.0-170.188 | < 5.15.0-92.102
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1127.133 | < 4.4.0-1165.180 | < 4.15.0-1164.177 | < 5.4.0-1117.127 | < 5.15.0-1052.57
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Debian2 products
- linux< 6.1.69-1 | < 6.6.8-1
- debian_linuxEOL10.0
Linux1 product
- linux_kernel≥ 4.3.0, < 4.19.302 | ≥ 4.20.0, < 5.4.264 | ≥ 5.5.0, < 5.10.204 | ≥ 5.11.0, < 5.15.143 | ≥ 5.16.0, < 6.1.68 | ≥ 6.2.0, < 6.6.7 | ≥ 4.3, < 6.7
3 vendors · 117 products
