Vulnerability-Lookup

FKIE_CVE-2025-39839

Vulnerability from fkie_nvd - Published: 2025-09-19 16:15 - Updated: 2026-01-20 15:31

Severity ?

7.1 (High) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H

Summary

In the Linux kernel, the following vulnerability has been resolved: batman-adv: fix OOB read/write in network-coding decode batadv_nc_skb_decode_packet() trusts coded_len and checks only against skb->len. XOR starts at sizeof(struct batadv_unicast_packet), reducing payload headroom, and the source skb length is not verified, allowing an out-of-bounds read and a small out-of-bounds write. Validate that coded_len fits within the payload area of both destination and source sk_buffs before XORing.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2ac1c	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541c48	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a	Patch
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html	Third Party Advisory, Mailing List
af854a3a-2127-422b-91ae-364da2661108	https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html	Third Party Advisory, Mailing List

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
linux	linux_kernel	6.17
debian	debian_linux	11.0

JSON

To clipboard

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    }
  ],
  "id": "CVE-2025-39839",
  "lastModified": "2026-01-20T15:31:05.347",
  "metrics": {
    "cvssMetricV31": [
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          "attackComplexity": "LOW",
          "attackVector": "LOCAL",
          "availabilityImpact": "HIGH",
          "baseScore": 7.1,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H",
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        "impactScore": 5.2,
        "source": "nvd@nist.gov",
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  "published": "2025-09-19T16:15:42.570",
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}

CVE-2025-39839 (GCVE-0-2025-39839)

Vulnerability from cvelistv5 – Published: 2025-09-19 15:26 – Updated: 2025-11-03 17:43

Title

batman-adv: fix OOB read/write in network-coding decode

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/30fc47248f02b8a14…
	https://git.kernel.org/stable/c/1e36c6c8dc8023b4b…
	https://git.kernel.org/stable/c/5d334bce9fad58cf3…
	https://git.kernel.org/stable/c/dce6c2aa70e94c04c…
	https://git.kernel.org/stable/c/bb37252c9af1cb250…
	https://git.kernel.org/stable/c/20080709457bc1e92…
	https://git.kernel.org/stable/c/a67c6397fcb7e842d…
	https://git.kernel.org/stable/c/d77b6ff0ce35a6d0b…

Impacted products

Vendor

Product

Version

Linux

Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < 30fc47248f02b8a14a61df469e1da4704be1a19f (git)
Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < 1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183 (git)
Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < 5d334bce9fad58cf328d8fa14ea1fff855819863 (git)
Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < dce6c2aa70e94c04c523b375dfcc664d7a0a560a (git)
Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < bb37252c9af1cb250f34735ee98f80b46be3cef1 (git)
Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < 20080709457bc1e920eb002483d7d981d9b2ac1c (git)
Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < a67c6397fcb7e842d3c595243049940970541c48 (git)
Affected: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb , < d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087 (git)

Linux

Affected: 3.10
Unaffected: 0 , < 3.10 (semver)
Unaffected: 5.4.299 , ≤ 5.4.* (semver)
Unaffected: 5.10.243 , ≤ 5.10.* (semver)
Unaffected: 5.15.192 , ≤ 5.15.* (semver)
Unaffected: 6.1.151 , ≤ 6.1.* (semver)
Unaffected: 6.6.105 , ≤ 6.6.* (semver)
Unaffected: 6.12.46 , ≤ 6.12.* (semver)
Unaffected: 6.16.6 , ≤ 6.16.* (semver)
Unaffected: 6.17 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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        "title": "CVE Program Container"
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        },
        {
          "url": "https://git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541c48"
        },
        {
          "url": "https://git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087"
        }
      ],
      "title": "batman-adv: fix OOB read/write in network-coding decode",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-39839",
    "datePublished": "2025-09-19T15:26:14.688Z",
    "dateReserved": "2025-04-16T07:20:57.141Z",
    "dateUpdated": "2025-11-03T17:43:54.812Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date

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.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2025-39839

CVE-2025-39839 (GCVE-0-2025-39839)

Tags

Sightings

Nomenclature