Vulnerability-Lookup

CERTFR-2026-AVI-0716

Vulnerability from certfr_avis - Published: 2026-06-10 - Updated: 2026-06-12

De multiples vulnérabilités ont été découvertes dans FreeBSD. Elles permettent à un attaquant de provoquer une élévation de privilèges.

Solutions

Se référer au bulletin de sécurité de l'éditeur pour l'obtention des correctifs (cf. section Documentation).

Impacted products

Vendor	Product	Description
FreeBSD	FreeBSD	FreeBSD branche 14.4 versions antérieures à 14.4-n273719
FreeBSD	FreeBSD	FreeBSD branche 14.3 versions antérieures à 14.3-n271519
FreeBSD	FreeBSD	FreeBSD branche 14 versions antérieures à 14-n274315
FreeBSD	FreeBSD	FreeBSD branche 15 versions antérieures à 15-n283886
FreeBSD	FreeBSD	FreeBSD branche 15.1 versions antérieures à 15.1-n283555
FreeBSD	FreeBSD	FreeBSD branche 15.0 versions antérieures à 15.0-n281057

References

Title

Publication Time

CVE-2026-45257 (GCVE-0-2026-45257)

Vulnerability from cvelistv5 – Published: 2026-06-26 14:50 – Updated: 2026-06-27 03:55

Title

Arbitrary file overwrite via the KTLS receive path

Summary

The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify. This assumption does not hold for data placed on a socket by sendfile(2), which can reference file-backed memory directly through non-anonymous M_EXTPG pages or EXT_SFBUF mbufs. When the sender transmits such data over a loopback connection without enabling KTLS on the transmit side, the file-backed mbufs reach the receiver's decryption path unchanged. Decrypting a record in place then overwrites the backing file's page cache instead of a private copy of the data. An unprivileged local user who can read a file can overwrite its contents with data of their choosing by sending the file over a loopback connection on which they have enabled KTLS receive. The write modifies the page cache directly, so it bypasses file flags such as schg and is written back to disk. By overwriting a setuid binary or other trusted file, a local user can escalate privileges, potentially gaining full control of the affected system.

Severity

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-11 00:00 UTC

CWE

CWE-123 - Write-what-where Condition

Assigner

freebsd CNA under the mitre root

CNA scorecard D 60/100 over 61 records in the last 180 days details

References

4 references

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/0…
http://www.openwall.com/lists/oss-security/2026/0…
https://www.heise.de/en/news/FreeBSD-Privilege-Es…	third-party-advisoryexploit

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.0-RELEASE , < p10 (release) Affected: 14.4-RELEASE , < p6 (release) Affected: 14.3-RELEASE , < p15 (release)

Date Public

2026-06-09 23:30

Credits

Bumsrakete

Show details on NVD website

JSON

To clipboard

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  "containers": {
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        "providerMetadata": {
          "dateUpdated": "2026-06-26T14:57:59.851Z",
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            "url": "http://www.openwall.com/lists/oss-security/2026/06/10/20"
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          {
            "url": "http://www.openwall.com/lists/oss-security/2026/06/10/21"
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              "confidentialityImpact": "HIGH",
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          "dateUpdated": "2026-06-27T03:55:21.399Z",
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        "title": "CISA ADP Vulnrichment"
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      "datePublic": "2026-06-09T23:30:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "The KTLS receive path decrypted each record in place, assuming that the mbufs holding received data were anonymous and safe to modify.  This assumption does not hold for data placed on a socket by sendfile(2), which can reference file-backed memory directly through non-anonymous M_EXTPG pages or EXT_SFBUF mbufs.  When the sender transmits such data over a loopback connection without enabling KTLS on the transmit side, the file-backed mbufs reach the receiver\u0027s decryption path unchanged.  Decrypting a record in place then overwrites the backing file\u0027s page cache instead of a private copy of the data.\n\nAn unprivileged local user who can read a file can overwrite its contents with data of their choosing by sending the file over a loopback connection on which they have enabled KTLS receive.  The write modifies the page cache directly, so it bypasses file flags such as schg and is written back to disk.  By overwriting a setuid binary or other trusted file, a local user can escalate privileges, potentially gaining full control of the affected system."
        }
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          "descriptions": [
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        "orgId": "63664ac6-956c-4cba-a5d0-f46076e16109",
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      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://security.freebsd.org/advisories/FreeBSD-SA-26:26.ktls.asc"
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      ],
      "title": "Arbitrary file overwrite via the KTLS receive path",
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    "datePublished": "2026-06-26T14:50:27.157Z",
    "dateReserved": "2026-05-11T16:27:44.891Z",
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    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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CVE-2026-49413 (GCVE-0-2026-49413)

Vulnerability from cvelistv5 – Published: 2026-06-27 09:08 – Updated: 2026-06-29 13:05

Title

Flaw in Linuxulator execution of setugid binaries

Summary

The Linuxulator determined whether a binary was set-user-ID or set-group-ID by checking the P_SUGID process flag. During execve(2), this flag is not yet set at the point where the auxiliary vector is constructed, so AT_SECURE was incorrectly set to zero for set-user-ID and set-group-ID executables. An unprivileged local user can inject a shared library via LD_PRELOAD into a set-user-ID or set-group-ID Linux binary, gaining the privileges of that binary.

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-06-29 13:05 UTC

CWE

CWE-266 - Incorrect Privilege Assignment

Assigner

freebsd CNA under the mitre root

CNA scorecard D 60/100 over 61 records in the last 180 days details

References

1 reference

URL	Tags
https://security.freebsd.org/advisories/FreeBSD-S…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
FreeBSD	FreeBSD	Affected: 15.0-RELEASE , < p10 (release) Affected: 14.4-RELEASE , < p6 (release) Affected: 14.3-RELEASE , < p15 (release)

Date Public

2026-06-09 23:30

Credits

Minseong Kim of NSHC Red Alert Labs

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "adp": [
      {
        "metrics": [
          {
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              "attackVector": "LOCAL",
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              "confidentialityImpact": "NONE",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
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        "title": "CISA ADP Vulnrichment"
      }
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Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

Order JSON

How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.

Publication & reservation Sightings KEV catalogs Other timestamps

Loading timeline…

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CERTFR-2026-AVI-0716

Solutions

CVE-2026-45257 (GCVE-0-2026-45257)

CVE-2026-49413 (GCVE-0-2026-49413)

Tags

Sightings

Nomenclature

Vulnerability timeline

Related by attack behaviour