CVE-2026-110912

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Source
https://cve.org/CVERecord?id=CVE-2026-110912
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110912.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-110912
Published
2026-10-15T03:23:47Z
Modified
2026-10-17T07:05:02Z
Severity
  • 7.1 (High) CVSS_V4 - CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N CVSS Calculator
Summary
[none]
Details

In DragonFly BSD through 6.4.2 before 4bb22ff, the ARP input handlers arpintr() and in_arpinput() (sys/netinet/if_ether.c) do not validate the hardware address length (ar_hln) and protocol address length (ar_pln) fields of incoming ARP packets. in_arpreply() then uses these attacker-controlled values as memcpy lengths when copying from kernel buffers that are only 6 and 4 bytes long, resulting in an out-of-bounds read of kernel heap and stack memory that is copied into the ARP reply sent back to the requester. An unauthenticated attacker on the adjacent network can use a single crafted ARP request to disclose up to roughly 250 bytes of each type of kernel memory, including kernel pointers. This is expected to be fixed in the 6.6 stable release when that is available.

Database specific 
{
    "cna_assigner":  "mitre",
    "cwe_ids":  [
        "CWE-130"
    ],
    "osv_generated_from":  "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/110xxx/CVE-2026-110912.json"
}
References

Affected packages

Git / github.com/DragonFlyBSD/DragonFlyBSD

Affected ranges

Type
GIT
Repo
https://github.com/DragonFlyBSD/DragonFlyBSD
Events
Introduced
984263bcb83ad82313113c6ac840d99124d8f90c
Fixed
4bb22ffcf2e9fb44995fbfd9945194afc87fb182

Affected versions

v2.*
v2.11.0
v2.13.0
v2.3.0
v2.5.0
v2.5.1
v2.7.1
v2.7.2
v2.7.3
v2.9.0
v2.9.1
v3.*
v3.1.0
v3.5.0
v3.7.1
v3.9.0
v4.*
v4.1.0
v4.3.0
v4.3.1
v4.5.0
v4.7.0
v4.9.0
v5.*
v5.1.0
v5.3.0
v5.5.0
v5.7.0
v5.9.0
v6.*
v6.1.0
v6.3.0
v6.5.0

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-110912.json"
vanir_signatures 
[
    {
        "deprecated":  false,
        "digest":  {
            "line_hashes":  [
                "169839723391213934128822977498539792695",
                "55268572927451829838580985002784812269",
                "112595040932465443657637547094154084472",
                "211374956065252205858099073361102766106",
                "251340312074412460752855133803987140995",
                "249129358550399579794740278063909000826",
                "193501583759520673639619976329933702592",
                "198700797888900127565019450368960533608",
                "262952543326627757023972729763251712700",
                "325880969627086782774212397152253510567"
            ],
            "threshold":  0.9
        },
        "id":  "CVE-2026-110912-358c6e31",
        "signature_type":  "Line",
        "signature_version":  "v1",
        "source":  "https://github.com/DragonFlyBSD/DragonFlyBSD/commit/4bb22ffcf2e9fb44995fbfd9945194afc87fb182",
        "target":  {
            "file":  "sys/netinet/if_ether.c"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "297272405417032474261010710154104777633",
            "length":  932
        },
        "id":  "CVE-2026-110912-6dc650d4",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/DragonFlyBSD/DragonFlyBSD/commit/4bb22ffcf2e9fb44995fbfd9945194afc87fb182",
        "target":  {
            "file":  "sys/netinet/if_ether.c",
            "function":  "arpintr"
        }
    },
    {
        "deprecated":  false,
        "digest":  {
            "function_hash":  "75680658427943927122721655661902106312",
            "length":  3776
        },
        "id":  "CVE-2026-110912-d9fdc578",
        "signature_type":  "Function",
        "signature_version":  "v1",
        "source":  "https://github.com/DragonFlyBSD/DragonFlyBSD/commit/4bb22ffcf2e9fb44995fbfd9945194afc87fb182",
        "target":  {
            "file":  "sys/netinet/if_ether.c",
            "function":  "in_arpinput"
        }
    }
]
vanir_signatures_modified 
"2026-10-17T07:05:02Z"