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NVD / CVE Program· CNA Linux

CVE-2022-49380: f2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count()

MediumCVSS 5.5 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 22/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 0.26% (FIRST EPSS).
  • Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. No special conditions are required; it is repeatable.
  • Fixed version: Linux Linux 2766ddaf45b69252bb8fe526b5b6e56904a9ae7a, 4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e, 89d9a48d0cd30429463ea4e37ca83be6773ed5eb.

Low priority for now. Upgrade to Linux Linux 2766ddaf45b69252bb8fe526b5b6e56904a9ae7a, 4d17e6fe9293d57081ffdc11e1cf313e25e8fd9e, 89d9a48d0cd30429463ea4e37ca83be6773ed5eb or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: f2fs: fix to avoid f2fs_bug_on() in dec_valid_node_count() As Yanming reported in bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=215897 I have encountered a bug in F2FS file system in kernel v5.17. The kernel should enable CONFIG_KASAN=y and CONFIG_KASAN_INLINE=y. You can reproduce the bug by running the following commands: The kernel message is shown below: kernel BUG at fs/f2fs/f2fs.h:2511! Call Trace: f2fs_remove_inode_page+0x2a2/0x830 f2fs_evict_inode+0x9b7/0x1510 evict+0x282/0x4e0 do_unlinkat+0x33a/0x540 __x64_sys_unlinkat+0x8e/0xd0 do_syscall_64+0x3b/0x90 entry_SYSCALL_64_after_hwframe+0x44/0xae The root cause is: .total_valid_block_count or .total_valid_node_count could fuzzed to zero, then once dec_valid_node_count() was called, it will cause BUG_ON(), this patch fixes to print warning info and set SBI_NEED_FSCK into CP instead of panic.

Published
Feb 26, 2025
Updated
Aug 15, 2026
EPSS
0.2% · 18th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
linuxlinux kernel

Versions reported by the vendor

Affected version ranges reported by the assigning authority (Linux). Independent of NVD's CPE analysis and usually ahead of it.

  • Linux Linux

    • 3.8affected
    • 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 and later · before f8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53affected · git
    • 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 and later · before 2766ddaf45b69252bb8fe526b5b6e56904a9ae7aaffected · git
    • 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 and later · before bce859358d3d5940aa858e40ceee70ee6e76130eaffected · git
    • 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 and later · before 89d9a48d0cd30429463ea4e37ca83be6773ed5ebaffected · git
    • 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 and later · before ccffa99ae6a1f44797b57444c6a80382a42928feaffected · git
    • 39a53e0ce0df01b3cf4bb898c7ae2fd2189647d5 and later · before 4d17e6fe9293d57081ffdc11e1cf313e25e8fd9eaffected · git
    • before 3.8not affected · semver
    • 5.4.198 and later · up to and including 5.4.*not affected · semver
    • 5.10.121 and later · up to and including 5.10.*not affected · semver
Affected versions · NVD (5)

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • linux linux kernel3.8 and later · before 5.4.198
  • linux linux kernel5.5 and later · before 5.10.121
  • linux linux kernel5.11 and later · before 5.15.46
  • linux linux kernel5.16 and later · before 5.17.14
  • linux linux kernel5.18 and later · before 5.18.3

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 5.18.5-15.18.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV
    90Now
  • CVE-2022-0847A flaw was found in the way the "flags" member of the new pipe buffer structure was lacking proper initialization in copy_page_to_iter_pipe…KEV
    89Now
  • CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV
    85Now

Published before and after this one in the same product

  • ← EarlierCVE-2022-49378Feb 26, 2025 · sfc: fix considering that all channels have TX queues
    22Monitor
  • ← EarlierCVE-2022-49379Feb 26, 2025 · driver core: Fix wait_for_device_probe() & deferred_probe_timeout interaction
    22Monitor
  • Later →CVE-2022-49381Feb 26, 2025 · jffs2: fix memory leak in jffs2_do_fill_super
    22Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
Linux Linux2766ddaf45b69252bb8fe526b5b6e56904a9ae7aVendor (CNA)
Linux Linux4d17e6fe9293d57081ffdc11e1cf313e25e8fd9eVendor (CNA)
Linux Linux89d9a48d0cd30429463ea4e37ca83be6773ed5ebVendor (CNA)
Linux Linuxbce859358d3d5940aa858e40ceee70ee6e76130eVendor (CNA)
Linux Linuxccffa99ae6a1f44797b57444c6a80382a42928feVendor (CNA)
Linux Linuxf8b3c3fcf33105bc1ee7788e3b51b0a1ae42ae53Vendor (CNA)
debian:linux5.18.5-1 · Debian:12Package registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

Not on record for this CVE: EPSS history · patch commit or PR link · researcher credit · variant or chain candidate · public bounty program.

Technical details

Attack conditions

  • Someone with local access to the system can trigger it.
  • A low-privileged account is enough.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
none
Integrity
none
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
None
Integrity impact
None
Availability impact
High

Weakness class (CWE)

—

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

MITRE has no CAPEC/ATT&CK mapping for this CWE.

References

Show all references (5 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records