fkie_cve-2025-39839
Vulnerability from fkie_nvd
Published
2025-09-19 16:15
Modified
2025-09-22 21:23
Severity ?
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
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2ac1c
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541c48
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a
Impacted products
Vendor Product Version


To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbatman-adv: fix OOB read/write in network-coding decode\n\nbatadv_nc_skb_decode_packet() trusts coded_len and checks only against\nskb-\u003elen. XOR starts at sizeof(struct batadv_unicast_packet), reducing\npayload headroom, and the source skb length is not verified, allowing an\nout-of-bounds read and a small out-of-bounds write.\n\nValidate that coded_len fits within the payload area of both destination\nand source sk_buffs before XORing."
    }
  ],
  "id": "CVE-2025-39839",
  "lastModified": "2025-09-22T21:23:01.543",
  "metrics": {},
  "published": "2025-09-19T16:15:42.570",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2ac1c"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541c48"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Awaiting Analysis"
}


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