CVE-2025-39839
batman-adv: fix OOB read/write in network-coding decode
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Description
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.
Affected
Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.
Remediation
No guide yetNo remediation guidance has been written for this CVE yet. What the record does show:
Patch and advisory references
- https://git.kernel.org/stable/c/30fc47248f02b8a14a61df469e1da4704be1a19f
- https://git.kernel.org/stable/c/1e36c6c8dc8023b4bbe9a16e819f9998b9b6a183
- https://git.kernel.org/stable/c/5d334bce9fad58cf328d8fa14ea1fff855819863
- https://git.kernel.org/stable/c/dce6c2aa70e94c04c523b375dfcc664d7a0a560a
- https://git.kernel.org/stable/c/bb37252c9af1cb250f34735ee98f80b46be3cef1
References (12)
CVSS
- Attack Vector
- LOCAL
- Complexity
- LOW
- Privileges
- LOW
- User Interaction
- NONE
- Scope
- UNCHANGED
- Confidentiality
- HIGH
- Integrity
- NONE
- Availability
- HIGH
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