CVE-2026-56117
dhcpcd through 10.3.2, fixed in commit 78ea09e, contains a heap use-after-free vulnerability in the control socket handling within src/control.c that allows local unprivileged attackers to trigger memory corruption when privilege separation is disabled. Attackers can connect to the control socket and send a privileged command such as -x, causing control_recvdata() to free the client object while the same READ+HANGUP event subsequently reaches control_hangup() with the stale pointer, resulting in a use-after-free condition exploitable in deployments using --disable-privsep or where privsep initialization has failed with the control socket operating in mode 0666.
- Affected products
- Dhcpcd
- Dhcpcd Project Dhcpcd
- ≤ 10.3.2
- Fix
- Available
- CVSS 4.0
- 5.7 MEDIUM
- CVSS 3.1
- 5.5 MEDIUM
- EPSS
- 0.1% (3th percentile)
- Weakness
- CWE-416
- NVD status
- Analyzed
- Published
- 2026-06-23
No indexed exploits for CVE-2026-56117 yet
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