CVE-2025-39839 (GCVE-0-2025-39839)
Vulnerability from cvelistv5
Published
2025-09-19 15:26
Modified
2025-09-29 06:00
Severity ?
VLAI Severity ?
EPSS score ?
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
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| ▼ | Linux | Linux |
Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb Version: 2df5278b0267c799f3e877e8eeddbb6e93cda0bb |
||||||
|
|||||||||
{
"containers": {
"cna": {
"affected": [
{
"defaultStatus": "unaffected",
"product": "Linux",
"programFiles": [
"net/batman-adv/network-coding.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"lessThan": "30fc47248f02b8a14a61df469e1da4704be1a19f",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
},
{
"lessThan": "1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
},
{
"lessThan": "5d334bce9fad58cf328d8fa14ea1fff855819863",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
},
{
"lessThan": "dce6c2aa70e94c04c523b375dfcc664d7a0a560a",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
},
{
"lessThan": "bb37252c9af1cb250f34735ee98f80b46be3cef1",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
},
{
"lessThan": "20080709457bc1e920eb002483d7d981d9b2ac1c",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
},
{
"lessThan": "a67c6397fcb7e842d3c595243049940970541c48",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
},
{
"lessThan": "d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087",
"status": "affected",
"version": "2df5278b0267c799f3e877e8eeddbb6e93cda0bb",
"versionType": "git"
}
]
},
{
"defaultStatus": "affected",
"product": "Linux",
"programFiles": [
"net/batman-adv/network-coding.c"
],
"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
"vendor": "Linux",
"versions": [
{
"status": "affected",
"version": "3.10"
},
{
"lessThan": "3.10",
"status": "unaffected",
"version": "0",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.4.*",
"status": "unaffected",
"version": "5.4.299",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.10.*",
"status": "unaffected",
"version": "5.10.243",
"versionType": "semver"
},
{
"lessThanOrEqual": "5.15.*",
"status": "unaffected",
"version": "5.15.192",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.1.*",
"status": "unaffected",
"version": "6.1.151",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.6.*",
"status": "unaffected",
"version": "6.6.105",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.12.*",
"status": "unaffected",
"version": "6.12.46",
"versionType": "semver"
},
{
"lessThanOrEqual": "6.16.*",
"status": "unaffected",
"version": "6.16.6",
"versionType": "semver"
},
{
"lessThanOrEqual": "*",
"status": "unaffected",
"version": "6.17",
"versionType": "original_commit_for_fix"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.4.299",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.10.243",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "5.15.192",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.1.151",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.6.105",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.12.46",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.16.6",
"versionStartIncluding": "3.10",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
"versionEndExcluding": "6.17",
"versionStartIncluding": "3.10",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"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."
}
],
"providerMetadata": {
"dateUpdated": "2025-09-29T06:00:44.207Z",
"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
"shortName": "Linux"
},
"references": [
{
"url": "https://git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f"
},
{
"url": "https://git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183"
},
{
"url": "https://git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863"
},
{
"url": "https://git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a"
},
{
"url": "https://git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1"
},
{
"url": "https://git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2ac1c"
},
{
"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": "2025-09-29T06:00:44.207Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"nvd": "{\"cve\":{\"id\":\"CVE-2025-39839\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-09-19T16:15:42.570\",\"lastModified\":\"2025-09-22T21:23:01.543\",\"vulnStatus\":\"Awaiting Analysis\",\"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.\"}],\"metrics\":{},\"references\":[{\"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\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
}
}