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

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2025-39839
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-09-19 16:15:42 UTC
Updated2026-05-12 13:17:14 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 7.1 HIGH from [email protected]

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

Problem Types: CWE-125

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb 30fc47248f02b8a14a61df469e1da4704be1a19f git Not specified
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb 1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183 git Not specified
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb 5d334bce9fad58cf328d8fa14ea1fff855819863 git Not specified
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb dce6c2aa70e94c04c523b375dfcc664d7a0a560a git Not specified
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb bb37252c9af1cb250f34735ee98f80b46be3cef1 git Not specified
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb 20080709457bc1e920eb002483d7d981d9b2ac1c git Not specified
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb a67c6397fcb7e842d3c595243049940970541c48 git Not specified
CNA Linux Linux affected 2df5278b0267c799f3e877e8eeddbb6e93cda0bb d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087 git Not specified
CNA Linux Linux affected 3.10 Not specified
CNA Linux Linux unaffected 3.10 semver Not specified
CNA Linux Linux unaffected 5.4.299 5.4.* semver Not specified
CNA Linux Linux unaffected 5.10.243 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.192 5.15.* semver Not specified
CNA Linux Linux unaffected 6.1.151 6.1.* semver Not specified
CNA Linux Linux unaffected 6.6.105 6.6.* semver Not specified
CNA Linux Linux unaffected 6.12.46 6.12.* semver Not specified
CNA Linux Linux unaffected 6.16.6 6.16.* semver Not specified
CNA Linux Linux unaffected 6.17 * original_commit_for_fix Not specified
ADP Siemens RUGGEDCOM RST2428P affected V3.3 custom Not specified
ADP Siemens SCALANCE XC-300/XR-300/XC-400/XR-500WG/XR-500 Family affected V3.3 custom Not specified
ADP Siemens SCALANCE XCH328 affected V3.3 custom Not specified
ADP Siemens SCALANCE XCM324 affected V3.3 custom Not specified
ADP Siemens SCALANCE XCM328 affected V3.3 custom Not specified
ADP Siemens SCALANCE XCM332 affected V3.3 custom Not specified
ADP Siemens SCALANCE XRH334 24 V DC 8xFO CC affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 230 V AC 12xFO affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 230 V AC 8xFO affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 230V AC 2x10G 24xSFP 8xSFP affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 24 V DC 12xFO affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 24 V DC 8xFO affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 24V DC 2x10G 24xSFP 8xSFP affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 2x230 V AC 12xFO affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 2x230 V AC 8xFO affected V3.3 custom Not specified
ADP Siemens SCALANCE XRM334 2x230V AC 2x10G 24xSFP 8xSFP affected V3.3 custom Not specified
ADP Siemens SIMATIC CN 4100 affected V5.0 custom Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/d77b6ff0ce35a6d0b0b7b9581bc3f76d041d4087 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00008.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/20080709457bc1e920eb002483d7d981d9b2ac1c 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-089022.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
cert-portal.siemens.com/productcert/html/ssa-032379.html 0b142b55-0307-4c5a-b3c9-f314f3fb7c5e cert-portal.siemens.com
git.kernel.org/stable/c/a67c6397fcb7e842d3c595243049940970541c48 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
lists.debian.org/debian-lts-announce/2025/10/msg00007.html af854a3a-2127-422b-91ae-364da2661108 lists.debian.org Mailing List, Third Party Advisory
git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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