A specially crafted packet can cause dhclient to overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution.
No advisories yet.
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
Fri, 01 May 2026 16:15:00 +0000
| Type | Values Removed | Values Added |
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| Metrics |
cvssV3_1
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cvssV3_1
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Fri, 01 May 2026 12:45:00 +0000
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| CPEs | cpe:2.3:o:freebsd:freebsd:13.5:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:beta3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p10:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p11:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p12:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p7:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p8:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:13.5:p9:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p10:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p11:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p6:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p7:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p8:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.3:p9:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:14.4:rc1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:-:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p1:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p2:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p3:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p4:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p5:*:*:*:*:*:* cpe:2.3:o:freebsd:freebsd:15.0:p6:*:*:*:*:*:* |
Thu, 30 Apr 2026 13:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Metrics |
cvssV3_1
|
Thu, 30 Apr 2026 11:45:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Freebsd
Freebsd freebsd |
|
| Vendors & Products |
Freebsd
Freebsd freebsd |
Thu, 30 Apr 2026 09:00:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | As dhclient is building an environment to pass to dhclient-script, it may need to resize the array of string pointers. The code which expands the array incorrectly calculates its new size when requesting memory, resulting in a heap buffer overrun. A specially crafted packet can cause dhclient to overrun its buffer of environment entries. This can result in a crash, but it may be possible to leverage this bug to achieve remote code execution. | |
| Title | Remotely triggerable out-of-bounds heap write in dhclient | |
| Weaknesses | CWE-122 | |
| References |
|
Projects
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Status: PUBLISHED
Assigner: freebsd
Published:
Updated: 2026-05-01T15:26:06.292Z
Reserved: 2026-04-28T05:31:44.956Z
Link: CVE-2026-42512
Updated: 2026-04-30T13:09:53.917Z
Status : Modified
Published: 2026-04-30T09:16:03.373
Modified: 2026-05-01T16:16:32.447
Link: CVE-2026-42512
No data.
OpenCVE Enrichment
Updated: 2026-05-02T00:30:16Z