f2fs: remove WARN_ON in f2fs_is_valid_blkaddr

Answer in brief

CVE-2022-49318 records a Medium severity (CVSS 5.5) vulnerability in f2fs: remove WARN_ON in f2fs_is_valid_blkaddr. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Feb 26, 2025Updated Aug 15, 2026Source checked Sep 29, 2026First seen by HOL Aug 15, 2026Material review Aug 15, 2026

Upstream Advisory

Key facts

Risk: Medium · CVSS 5.5
Exploitation: Not marked as known exploited
Affected software: 3 mapped packages or products
Fix availability: Available

Why this deserves its current priority

CVSS is 5.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
Product	Affected versions	Fixed versions
cpe:2.3:o:linux:linux_kernel::::::::	Not reported	Not reported

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Linux/Linuxgeneric	>=c9b60788fc760d136211853f10ce73dc152d1f4a <0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd \|\| >=c9b60788fc760d136211853f10ce73dc152d1f4a <32bea51fe4c6e92c00403739f7547c89219bea88 \|\| >=c9b60788fc760d136211853f10ce73dc152d1f4a <99c09b298e47ebbe345a6da9f268b32a6b0f4582 \|\| >=c9b60788fc760d136211853f10ce73dc152d1f4a <cd6374af36cc548464d8c47a93fdba7303bb82a4 \|\| >=c9b60788fc760d136211853f10ce73dc152d1f4a <8c62c5e26345c34d199b4b8c8e69255ba3d0e751 \|\| >=c9b60788fc760d136211853f10ce73dc152d1f4a <dc2f78e2d4cc844a1458653d57ce1b54d4a29f21 \|\| bdffda8db8d9e0125b9a41edc420c39f9905c6ab \|\| aafb371575161e315a98dee978b72f9d5357791b \|\| ad19d1e78fd51f5b4bf3ebbcbf3a133c8c03c49d \|\| >=4.4.172 <4.5 \|\| >=4.9.144 <4.10 \|\| >=4.14.86 <4.15	0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd, 32bea51fe4c6e92c00403739f7547c89219bea88, 99c09b298e47ebbe345a6da9f268b32a6b0f4582, cd6374af36cc548464d8c47a93fdba7303bb82a4, 8c62c5e26345c34d199b4b8c8e69255ba3d0e751, dc2f78e2d4cc844a1458653d57ce1b54d4a29f21, 4.5, 4.10, 4.15
Linux/Linuxgeneric	4.19	Not reported

Recommended response

Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux.
Review the reported fix. Update Linux/Linux to 0a7a1fc7e71eecf2e5053a6c312c9f0dcbb9b8fd if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Feb 26, 2025
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Aug 15, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Aug 15, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.