Use After Free Affecting torvalds/linux package, versions [,5.15)[6.0-rc1,6.12.28)[6.13-rc1,6.14.6)[6.15-rc1,6.15-rc5)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-UNMANAGED-TORVALDSLINUX-10245851
- published26 May 2025
- disclosed20 May 2025
- creditSean Heelan
Introduced: 20 May 2025
CVE-2025-37899 (opens in a new tab)How to fix?
Upgrade torvalds/linux to version 5.15, 6.12.28, 6.14.6, 6.15-rc5 or higher.
Overview
Affected versions of this package are vulnerable to Use After Free in the handler for the SMB ‘logoff’ command due to the sess->user object that can currently be in use by another thread. For example if another connection has sent a session setup request to bind to the session being freed, the handler for that connection could be in the smb2_sess_setup function which makes use of sess->user. Depending on the exact timing, an attacker could cause either a use‑after‑free or a NULL pointer dereference, both leading to denial of service.