CVE-2021-32786 is a vulnerability discovered in the Linux kernel's fs/seq_file.c file. It was identified as an out-of-bounds write issue and affects all versions of the Linux kernel released since 2014, including the latest stable releases. The vulnerability can be exploited by attackers to gain elevated privileges on affected systems through local or remote attacks.
The vulnerability was publicly disclosed on May 20th, 2021, and was assigned a severity score of 7.8 out of 10 by the National Vulnerability Database (NVD). The flaw was reportedly introduced in a patch that aimed to fix another security issue in the same file. The flaw went undetected for several years until a researcher discovered it in May 2021.
Several patches have been released since the vulnerability was disclosed, including one by Linux creator Linus Torvalds. However, it is recommended that users update their systems with the latest patches to mitigate the risk posed by the CVE-2021-32786 vulnerability. Organizations should also ensure that their systems are regularly patched and updated to prevent malicious actors from exploiting any known vulnerabilities.