01 Record
CVE-2026-99999
ipv4: validate checksum_start before completing checksum
CriticalPUBLISHEDCNA: Linux
CNA base score9.3 CVSS v3.xCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
02 Description
ipv4: validate checksum_start before completing checksum
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- Not scored by EPSS
- EPSS percentile
- Not scored by EPSS
- NVD base score
- 9.3 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- NVD analysis status
- Received. NVD last modified this record on 2026-10-15.
- Red Hat severity
- No Red Hat rating. Red Hat rates the CVEs that affect its products.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2026-10-15 12:19Z7 HR AGO
- Last updated
- 2026-10-15 12:19Z7 HR AGO
- Reserved
- 2026-09-25
- Assigning CNA
- Linux
- Record state
- PUBLISHED
- Severity
- Critical (CVSS 9.3)
- CNA CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Weaknesses
- No CWE assigned
- Data version
- 5.2
- Document digest
- c45d309744890a7a6070164113fb7e8bd34fb225114985672dbe56e7ab45b226
05 Affected products
VendorProductVersionsPlatforms
LinuxLinuxf43798c27684ab925adde7d8acc34c78c6e50df8 to < a464d950f31c89565cbaae038cc60db04fe01956, f43798c27684ab925adde7d8acc34c78c6e50df8 to < 0fab003ef4698e0628060a45a48f14b43ba2a40a, f43798c27684ab925adde7d8acc34c78c6e50df8 to < 94524b7b32691de2e2ce162c04d6cbc9106e5cbf, f43798c27684ab925adde7d8acc34c78c6e50df8 to < a65f69e0f38ffbed1b128029e09097436416dc8b, f43798c27684ab925adde7d8acc34c78c6e50df8 to < 32a8b0adaa18e52aaa0b246b5ffe683075354dbb, f43798c27684ab925adde7d8acc34c78c6e50df8 to < f3e835af6226f1dd12160cbd696081e9b6155de0, f43798c27684ab925adde7d8acc34c78c6e50df8 to < c3e33464746166264334641dc850a36eef7e6326, f43798c27684ab925adde7d8acc34c78c6e50df8 to < 6785011f8b16abf40b1e9d8b2e332232b3e68822, 2.6.27—
06 References
- git.kernel.orghttps://git.kernel.org/stable/c/a464d950f31c89565cbaae038cc60db04fe01956
- git.kernel.orghttps://git.kernel.org/stable/c/0fab003ef4698e0628060a45a48f14b43ba2a40a
- git.kernel.orghttps://git.kernel.org/stable/c/94524b7b32691de2e2ce162c04d6cbc9106e5cbf
- git.kernel.orghttps://git.kernel.org/stable/c/a65f69e0f38ffbed1b128029e09097436416dc8b
- git.kernel.orghttps://git.kernel.org/stable/c/32a8b0adaa18e52aaa0b246b5ffe683075354dbb
- git.kernel.orghttps://git.kernel.org/stable/c/f3e835af6226f1dd12160cbd696081e9b6155de0
- git.kernel.orghttps://git.kernel.org/stable/c/c3e33464746166264334641dc850a36eef7e6326
- git.kernel.orghttps://git.kernel.org/stable/c/6785011f8b16abf40b1e9d8b2e332232b3e68822
- pwn.aihttps://pwn.ai/blog/Pwnescape
- vercel.comhttps://vercel.com/blog/findings-from-the-1-million-dollar-vercel-sandbox-challenge