CVE-2026-31430None▾ SunlitIn the Linux kernel, the following vulnerability has been resolved: X.509: Fix out-of-bounds access when parsing extensions Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extens…
▾ Sunlit zone — Low / medium · no exploitation signal
impact 2.8 · likelihood 0 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Nov 5.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CVEORG
Last analysed / modified upstream
0.08%
In the Linux kernel, the following vulnerability has been resolved:
X.509: Fix out-of-bounds access when parsing extensions
Leo reports an out-of-bounds access when parsing a certificate with empty Basic Constraints or Key Usage extension because the first byte of the extension is read before checking its length. Fix it.
The bug can be triggered by an unprivileged user by submitting a specially crafted certificate to the kernel through the keyrings(7) API. Leo has demonstrated this with a proof-of-concept program responsibly disclosed off-list.
Linux >= 30eae2b037af54b24109dcaea21db46f6285c69b < 672b526def1f94c1be8eb11b885b803da0d8c2f1Linux >= 30eae2b037af54b24109dcaea21db46f6285c69b < 30ab358fad0c7daa1d282ec48089901b21b36a20Linux >= 30eae2b037af54b24109dcaea21db46f6285c69b < 206121294b9cf27f0589857f80d64f87e496ffb2Linux >= 30eae2b037af54b24109dcaea21db46f6285c69b < 7fb4dadc2734f4020d7543d688b8d49c8e569c61Linux >= 30eae2b037af54b24109dcaea21db46f6285c69b < d702c3408213bb12bd570bb97204d8340d141c51Linux 6.4Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Connected by shared product, vendor, weakness, or advisory.
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