CVE•Published 2025-09-19•Modified 2026-07-30•1 article on news•6 live references•NVD data
CVE-2025-39839Linux · Linux_kernel
Vulnerability data via NVD (ingested)
CVSS v3.1
8.8
HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
6
Exploit Prediction Scoring System · top 94% of all CVEs
Weaknesses (CWE)
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.
Timeline
Published 2025-09-19
Modified 2026-07-30
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag5 hosts
vuln:CVE-2025-39839Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · OS
os:"Linux Kernel"Hosts Shodan identified as running Linux Kernel.
More intel sources (5)
Shodan report
vuln:CVE-2025-39839Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2025-39839Censys host search filtered to this CVE id.
grep.app
CVE-2025-39839Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2025-39839GitHub code search for direct mentions.
Google dork
"CVE-2025-39839" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.