Search/CVE-2025-39839
● CVE — High

CVE-2025-39839

Vendordebian, linuxProductdebian linux, linux kernelDiscoveredSep 19, 2025UpdatedJul 30, 2026

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.

CVSS v3.1
8.8 HIGH
EPSS
0.26%
probability of exploitation in 30 days
CISA KEV
Not listed
no confirmed exploitation reported
News coverage
18
sources referencing this CVE
Related IOCs
0
seen in the same coverage
EPSS Trend
Aug 16, 2026 → Oct 22, 2026
▲ 0.02pp
0.24% → 0.26% over 3 tracked changes
CVSS v3.1 Detail
Attack VectorADJACENT
Attack ComplexityLOW
Privileges RequiredNONE
User InteractionNONE
ScopeUNCHANGED
ConfidentialityHIGH
IntegrityHIGH
AvailabilityHIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Connections
21 relationships
Timeline
disclosure → media coverage
Sep 19, 2025
Disclosure — published as a CVE record. · last revised by NVD Jul 30, 2026
Dec 4, 2025
ubuntu.com reports: USN-7909-1: Linux kernel vulnerabilities
Dec 4, 2025
ubuntu.com reports: USN-7909-2: Linux kernel (Real-time) vulnerabilities
Dec 4, 2025
ubuntu.com reports: USN-7909-3: Linux kernel (FIPS) vulnerabilities
Dec 4, 2025
ubuntu.com reports: USN-7910-1: Linux kernel (Azure FIPS) vulnerabilities
Dec 5, 2025
ubuntu.com reports: USN-7909-4: Linux kernel vulnerabilities
Dec 5, 2025
ubuntu.com reports: USN-7910-2: Linux kernel (Azure) vulnerabilities
Dec 15, 2025
ubuntu.com reports: USN-7933-1: Linux kernel (KVM) vulnerabilities
Dec 15, 2025
ubuntu.com reports: USN-7909-5: Linux kernel (Raspberry Pi) vulnerabilities
Dec 16, 2025
ubuntu.com reports: USN-7938-1: Linux kernel (Azure) vulnerabilities
Mar 16, 2026
ubuntu.com reports: USN-8095-1: Linux kernel vulnerabilities
Mar 16, 2026
ubuntu.com reports: USN-8095-2: Linux kernel (FIPS) vulnerabilities
Mar 17, 2026
ubuntu.com reports: USN-8095-3: Linux kernel (Real-time) vulnerabilities
Mar 23, 2026
ubuntu.com reports: USN-8095-4: Linux kernel (AWS) vulnerabilities
Mar 25, 2026
ubuntu.com reports: USN-8125-1: Linux kernel (Azure) vulnerabilities
Mar 25, 2026
ubuntu.com reports: USN-8126-1: Linux kernel (Azure) vulnerabilities
Apr 1, 2026
ubuntu.com reports: USN-8095-5: Linux kernel (Raspberry Pi) vulnerabilities
Apr 9, 2026
ubuntu.com reports: USN-8165-1: Linux kernel (Azure FIPS) vulnerabilities
May 7, 2026
ubuntu.com reports: USN-8261-1: Linux kernel (Xilinx) vulnerabilities