In the Linux kernel, the following vulnerability has been resolved: slip: remove slip_hangup() to fix use-after-free in slip_receive_buf() Jaeyoung… (CVE-2026-90057)
A use-after-free vulnerability in the Linux kernel's slip network driver was resolved by removing the slip_hangup() function. The flaw involved concurrent access to freed memory in slip_receive_buf() due to improper synchronization during tty hangup processing. This could lead to high impact on confidentiality, integrity, and availability.
AI Analysis
Technical Summary
The Linux kernel slip driver had a use-after-free vulnerability (CVE-2026-90057) caused by a race condition between slip_receive_buf() and tty hangup processing. Specifically, slip_hangup() called slip_close() without proper locking, which freed the net device and its private data while other threads could still access it. The fix removed slip_hangup() to ensure teardown is serialized cleanly by slip_close(), preventing concurrent access to freed memory.
Potential Impact
Exploitation of this vulnerability could allow local attackers with limited privileges to cause use-after-free conditions, potentially leading to arbitrary code execution, system crashes, or data corruption. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available that removes slip_hangup() to serialize teardown properly via slip_close(). Users should update their Linux kernel to a version that includes this fix. No additional mitigation steps are indicated.
In the Linux kernel, the following vulnerability has been resolved: slip: remove slip_hangup() to fix use-after-free in slip_receive_buf() Jaeyoung… (CVE-2026-90057)
Description
A use-after-free vulnerability in the Linux kernel's slip network driver was resolved by removing the slip_hangup() function. The flaw involved concurrent access to freed memory in slip_receive_buf() due to improper synchronization during tty hangup processing. This could lead to high impact on confidentiality, integrity, and availability.
CVSS v3.1
Score 7.8high
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel slip driver had a use-after-free vulnerability (CVE-2026-90057) caused by a race condition between slip_receive_buf() and tty hangup processing. Specifically, slip_hangup() called slip_close() without proper locking, which freed the net device and its private data while other threads could still access it. The fix removed slip_hangup() to ensure teardown is serialized cleanly by slip_close(), preventing concurrent access to freed memory.
Potential Impact
Exploitation of this vulnerability could allow local attackers with limited privileges to cause use-after-free conditions, potentially leading to arbitrary code execution, system crashes, or data corruption. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability.
Mitigation Recommendations
A fix is available that removes slip_hangup() to serialize teardown properly via slip_close(). Users should update their Linux kernel to a version that includes this fix. No additional mitigation steps are indicated.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-45fm-hw2m-668x
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-90057"]
- Database Specific Severity
- HIGH
- Cvss Version
- 3.1
Threat ID: 6aade52855bf5e2cf5edc1d2
Added to database: 09/19/2026, 01:28:08 UTC
Last enriched: 09/19/2026, 01:55:14 UTC
Last updated: 09/19/2026, 02:01:33 UTC
Views: 2
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