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CVE-2026-45253General(freebsd / freebsd)

MEDIUMCVSS 8.4 · HIGH

Exploitation ongoing with high activity in latest observed window (1 mentions)

Immediate actions

  • Prioritize remediation for freebsd freebsd systems immediately
  • Assume compromise if assets are exposed
  • Hunt for exploitation attempts and persistence artifacts
  • Increase monitoring for publicly documented tradecraft
  • Track advisory updates for patch or workaround availability

Recommended action window: Immediate (within 24h)

NVD description

ptrace(PT_SC_REMOTE) failed to properly validate parameters for the syscall(2) and __syscall(2) meta-system calls. As a result, a user with the ability to debug a process may trigger arbitrary code execution in the kernel, even if the target process has no special privileges. The missing validation allows an unprivileged local user to escalate privileges, potentially gaining full control of the affected system.

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5.0/ 10 priority

Sources & remediation

Vendor / third-party advisories
Weakness type (CWE)
CWE-787

Priority

MEDIUM

Exploitation

ACTIVE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • freebsd

Threat summary

  • Active exploitation appears in 1 classified signals
  • Public PoC is present in monitored signal
  • 3 mentions across 3 observed days
  • Momentum state: stable

What's happening

  • Active exploitation reported across 1 signal
  • PoC mentioned or linked in 1 signal
  • General: 1 classified signal
  • Peaked 2d ago at 1 mentions (2026-05-21); latest day: 1
  • 3 total mentions across 3 days

Affected systems

Vendors
freebsd
Products
freebsd

3 versions affected across 1 product

Deep dive

Activity timeline3 mentions / 3d
00111Mentions · 2026-05-21: 1Mentions · 2026-05-22: 1Mentions · 2026-05-29: 1PoC Mentioned / Linked · 2026-05-29: 1Active Exploitation · 2026-05-22: 105-2105-2205-29
Signal classification3 categories
General
133.3%
Active Exploitation
133.3%
PoC
133.3%
Referenced assets7 URLs
Classification over time
DateTotalLabels
2026-05-211
General1
2026-05-221
Active Exploitation1
2026-05-291
PoC1
Full discourse3 posts
  • Mr. OS@ksg93rd
    PoC

    #exploit #Kernel_Security An AI audit of FreeBSD https://blog.calif.io/p/an-ai-audit-of-freebsd ]-> setcred (CVE-2026-45250) https://github.com/califio/publications/tree/main/MADBugs/freebsd/setcred-CVE-2026-45250 ]-> ptrace (CVE-2026-45253) https://github.com/califio/publications/tree/main/MADBugs/freebsd/ptrace-CVE-2026-45253 ]-> procdesc (CVE-2026-45251) https://github.com/califio/publications/tree/main/MADBugs/freebsd/file-CVE-2026-45251 ]-> Bonus https://github.com/califio/publications/tree/main/MADBugs/freebsd // Disclaimer

    Post summary

    The post shares an AI‑driven audit of FreeBSD, linking to GitHub repos that contain proof‑of‑concept code for several new CVEs, without indicating active exploitation or patches.

    00003231
    3.3K followersView on X
  • VulDB 🛡@vuldb
    Active Exploitation

    Our CTI team identified a lot of activities targeting FreeBSD (CVE-2026-45253) https://vuldb.com/vuln/364990/cti

    Post summary

    CTI analysts report numerous attacks against FreeBSD targeting CVE‑2026‑45253, indicating active exploitation, but no proof‑of‑concept, exploit code, or patch information is provided.

    0000080
    2.2K followersView on X
  • VulDB 🛡@vuldb
    General

    We have just added an important vulnerability affecting FreeBSD (CVE-2026-45253) https://vuldb.com/vuln/364990

    Post summary

    A brief mention of a CVE (CVE-2026-45253) related to FreeBSD, with a link to a database entry, but without any PoC, exploit details, patch information, or technical specifics.

    0000083
    2.2K followersView on X
CPE platform detail29 entries

29 of 29 entries

PartVendorProductVersionTarget SWTarget HW
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.3--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd14.4--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--
OSfreebsdfreebsd15.0--

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