What’s Vulnerable › Vulnerabilities

CVE-2022-49318: f2fs: remove WARN_ON in f2fs_is_valid_blkaddr

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-02-26 · updated 2026-08-15

Description

In the Linux kernel, the following vulnerability has been resolved: f2fs: remove WARN_ON in f2fs_is_valid_blkaddr Syzbot triggers two WARNs in f2fs_is_valid_blkaddr and __is_bitmap_valid. For example, in f2fs_is_valid_blkaddr, if type is DATA_GENERIC_ENHANCE or DATA_GENERIC_ENHANCE_READ, it invokes WARN_ON if blkaddr is not in the right range. The call trace is as follows: f2fs_get_node_info+0x45f/0x1070 read_node_page+0x577/0x1190 __get_node_page.part.0+0x9e/0x10e0 __get_node_page f2fs_get_node_page+0x109/0x180 do_read_inode f2fs_iget+0x2a5/0x58b0 f2fs_fill_super+0x3b39/0x7ca0 Fix these two WARNs by replacing WARN_ON with dump_stack.

Affected products

• Linux kernel: before 5.4.198; from 5.5 before 5.10.122; from 5.11 before 5.15.47; from 5.16 before 5.17.15; from 5.18 before 5.18.4 — fixed in 5.10.122, 5.15.47, 5.17.15, 5.18.4, 5.4.198

How to fix

Upgrade to a fixed version: Linux kernel 5.10.122, 5.15.47, 5.17.15, 5.18.4. Check the vendor advisory for mitigations.

References

• https://git.kernel.org/stable/c/0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd
• https://git.kernel.org/stable/c/32bea51fe4c6e92c00403739f7547c89219bea88
• https://git.kernel.org/stable/c/8c62c5e26345c34d199b4b8c8e69255ba3d0e751
• https://git.kernel.org/stable/c/99c09b298e47ebbe345a6da9f268b32a6b0f4582
• https://git.kernel.org/stable/c/cd6374af36cc548464d8c47a93fdba7303bb82a4
• https://git.kernel.org/stable/c/dc2f78e2d4cc844a1458653d57ce1b54d4a29f21

Get alerted when CVE-2022-49318 or the next vulnerability affects your stack