Multiple race conditions in the handling of O_DIRECT in Linux kernel prior to version 2.4.22 could cause stale data to be returned from the disk when handling sparse files, or cause incorrect data to be returned when a file is truncated as it is being read, which might allow local users to obtain sensitive data that was originally owned by other users, a different vulnerability than CVE-2003-0018.

References

• https://nvd.nist.gov/vuln/detail/CVE-2003-0956
• https://exchange.xforce.ibmcloud.com/vulnerabilities/42942
• http://linux.bkbits.net:8080/linux-2.4/cset@3ef33d95ym_22QH2xwhDMt264M55Fg