What’s Vulnerable › Vulnerabilities

CVE-2022-48747: block: Fix wrong offset in bio_truncate()

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.9% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2024-06-20 · updated 2026-06-17
• Weakness: CWE-908

Description

In the Linux kernel, the following vulnerability has been resolved: block: Fix wrong offset in bio_truncate() bio_truncate() clears the buffer outside of last block of bdev, however current bio_truncate() is using the wrong offset of page. So it can return the uninitialized data. This happened when both of truncated/corrupted FS and userspace (via bdev) are trying to read the last of bdev.

Affected products

• Linux kernel: before 5.4.176; from 5.5 before 5.10.96; from 5.11 before 5.15.19; from 5.16 before 5.16.5 — fixed in 5.10.96, 5.15.19, 5.16.5, 5.4.176

How to fix

Upgrade to a fixed version: Linux kernel 5.10.96, 5.15.19, 5.16.5, 5.4.176. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/3ee859e384d453d6ac68bfd5971f630d9fa46ad3
• https://git.kernel.org/stable/c/4633a79ff8bc82770486a063a08b55e5162521d8
• https://git.kernel.org/stable/c/6cbf4c731d7812518cd857c2cfc3da9fd120f6ae
• https://git.kernel.org/stable/c/941d5180c430ce5b0f7a3622ef9b76077bfa3d82
• https://git.kernel.org/stable/c/b63e120189fd92aff00096d11e2fc5253f60248b
• https://git.kernel.org/stable/c/3ee859e384d453d6ac68bfd5971f630d9fa46ad3
• https://git.kernel.org/stable/c/4633a79ff8bc82770486a063a08b55e5162521d8
• https://git.kernel.org/stable/c/6cbf4c731d7812518cd857c2cfc3da9fd120f6ae
• https://git.kernel.org/stable/c/941d5180c430ce5b0f7a3622ef9b76077bfa3d82
• https://git.kernel.org/stable/c/b63e120189fd92aff00096d11e2fc5253f60248b

Get alerted when CVE-2022-48747 or the next vulnerability affects your stack