CWE-1335
Incorrect Bitwise Shift of Integer
Description
An integer value is specified to be shifted by a negative amount or an amount greater than or equal to the number of bits contained in the value causing an unexpected or indeterminate result.
{"xhtml:p":["Specifying a value to be shifted by a negative amount is undefined in various languages. Various computer architectures implement this action in different ways. The compilers and interpreters when generating code to accomplish a shift generally do not do a check for this issue.","Specifying an over-shift, a shift greater than or equal to the number of bits contained in a value to be shifted, produces a result which varies by architecture and compiler. In some languages, this action is specifically listed as producing an undefined result."]}
Parent Weaknesses (ChildOf)
Common Consequences
Scope
Impact
DoS: Crash, Exit, or Restart
Potential Mitigations
Implicitly or explicitly add checks and mitigation for negative or over-shift values.
CVE-2023-4720multimedia product performs a left shift with a negative value, leading to a crash
CVE-2009-4307An unexpected large value in the ext4 filesystem causes an overshift condition resulting in a divide by zero.
CVE-2012-2100An unexpected large value in the ext4 filesystem causes an overshift condition resulting in a divide by zero - fix of CVE-2009-4307.
CVE-2020-8835An overshift in a kernel allowed out of bounds reads and writes resulting in a root takeover.
CVE-2015-1607Program is not properly handling signed bitwise left-shifts causing an overlapping memcpy memory range error.
CVE-2016-9842Compression function improperly executes a signed left shift of a negative integer.
CVE-2018-18445Some kernels improperly handle right shifts of 32 bit numbers in a 64 bit register.
CVE-2013-4206Putty has an incorrectly sized shift value resulting in an overshift.
CVE-2018-20788LED driver overshifts under certain conditions resulting in a DoS.
Applicable Platforms
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