CVE-2025-37933: linux Double Free
Vulnerability summary
CVE-2025-37933 is a medium (CVSS 5.5) Double Free vulnerability in linux. EPSS estimates a 0.21% chance of exploitation in the next 30 days, higher than 10.2% of scored vulnerabilities.
Advisory lineage
Upstream 0 · Downstream 33 · Related 31Timeline
- 20-05-2025PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
In the Linux kernel, the following vulnerability has been resolved: octeon_ep: Fix host hang issue during device reboot When the host loses heartbeat messages from the device, the driver calls the device-specific ndo_stop function, which frees the resources. If the driver is unloaded in this scenario, it calls ndo_stop again, attempting to free resources that have already been freed, leading to a host hang issue. To resolve this, dev_close should be called instead of the device-specific stop function.dev_close internally calls ndo_stop to stop the network interface and performs additional cleanup tasks. During the driver unload process, if the device is already down, ndo_stop is not called.
CVSS metrics
3 scores · 3 sources · 1 version- 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
EPSS trend
Probability
0.21%
Chance of exploitation in the next 30 days
Percentile
10%
Versus all other CVEs
30-day change
+0.01 pp
From 0.19% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Ubuntu118 products
- linux< 6.8.0-100.100
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 6.8.0-1046.49
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ 5cb96c29aa0ea359e4f5d30585538dc6a847d69d, < 7e1ca1bed3f66e00377f7d2147be390144924276 | ≥ 5cb96c29aa0ea359e4f5d30585538dc6a847d69d, < c8d788f800f83b94d9db8b3dacc1d26be38a6ef4 | ≥ 5cb96c29aa0ea359e4f5d30585538dc6a847d69d, < 6d1052423518e7d0aece9af5e77bbc324face8f1 | ≥ 5cb96c29aa0ea359e4f5d30585538dc6a847d69d, < 34f42736b325287a7b2ce37e415838f539767bda | 6.4
- linux_kernel≥ 6.4, < 6.6.90 | ≥ 6.7, < 6.12.28 | ≥ 6.13, < 6.14.6 | 6.15:rc1 | 6.15:rc2 | 6.15:rc3 | 6.15:rc4
Debian1 product
- linux< 6.12.29-1
3 vendors · 121 products
