CVE-2026-25061: debian debian_linux Out-of-bounds Write
Vulnerability summary
CVE-2026-25061 is a high (CVSS 7.5) Out-of-bounds Write vulnerability in debian debian_linux. EPSS estimates a 0.58% chance of exploitation in the next 30 days, higher than 47% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 29-01-2026PublishedVulnerability first disclosed.
- 10-02-2026Last modifiedVulnerability information updated.
Description
tcpflow is a TCP/IP packet demultiplexer. In versions up to and including 1.61, wifipcap parses 802.11 management frame elements and performs a length check on the wrong field when handling the TIM element. A crafted frame with a large TIM length can cause a 1-byte out-of-bounds write past `tim.bitmap[251]`. The overflow is small and DoS is the likely impact; code execution is potential, but still up in the air. The affected structure is stack-allocated in `handle_beacon()` and related handlers. As of time of publication, no known patches are available.
CVSS metrics
6 scores · 4 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated6.9MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:PDiffers
- NVDNIST5.5MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- OSV · UbuntuEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated7.5HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.58%
Chance of exploitation in the next 30 days
Percentile
47%
Versus all other CVEs
30-day change
+0.03 pp
From 0.55% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundTcpflow
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Debian2 products
- tcpflowAll versions (No fix recorded) | < 1.5.2+repack1-1+deb11u1
- debian_linuxEOL11.0
Digitalcorpora1 product
- tcpflow≤ 1.6.1
Mageia1 product
- tcpflow< 1.6.1-3.1.mga9
Simsong1 product
- tcpflow≤ 1.61
Ubuntu1 product
- tcpflowAll versions (No fix recorded)
5 vendors · 6 products
References
8 links- github.com/simsong/tcpflow/security/advisories/GHSA-q5q6-frrv-9rj6X Refsource CONFIRMREPORTExploitMitigationVendor Advisory
