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NVD / CVE Program· CNA Linux

CVE-2026-68459: f2fs: fix potential deadlock in gc_merge path of f2fs_balance_fs()

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.21% (FIRST EPSS).
  • Fixed version: Linux Linux 1436031b33fa23ab1ce7df5bc5500093413e8acf, 8071500a8124e5a6d47d901a8d5ffd91743107a1, 89479a27fa4e1e11f378b3724944eabceb84f114.

Low priority for now. Upgrade to Linux Linux 1436031b33fa23ab1ce7df5bc5500093413e8acf, 8071500a8124e5a6d47d901a8d5ffd91743107a1, 89479a27fa4e1e11f378b3724944eabceb84f114 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 potential deadlock in gc_merge path of f2fs_balance_fs() When we mount device w/ gc_merge mount option, we may suffer below potential deadlock: Kworker GC trehad Truncator - f2fs_write_cache_pages - f2fs_write_single_data_page - f2fs_do_write_data_page - folio_start_writeback --- set writeback flag on folio - f2fs_outplace_write_data : cached folio in internal bio cache - f2fs_balance_fs - wake_up(gc_thread) : wake up gc thread to run foreground GC - finish_wait(fggc_wq) : wait on the waitqueue --- wait on GC thread to finish the work - truncate_inode_pages_range - __filemap_get_folio(, FGP_LOCK) --- lock folio - truncate_inode_partial_folio - folio_wait_writeback --- wait on writeback being cleared - do_garbage_collect - move_data_page - f2fs_get_lock_data_folio - lock on folio --- blocked on folio's lock In order to avoid such deadlock, let's call below functions to commit cached bios in GC_MERGE path of f2fs_balance_fs() as the same as we did in NOGC_MERGE path. - f2fs_submit_merged_write(sbi, DATA); - f2fs_submit_all_merged_ipu_writes(sbi);

—No exploit Fix available
Published
Aug 15, 2026
Updated
Aug 17, 2026
EPSS
0.2% · 11th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.2%

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Noroxi analysis

What does it mean in your environment?

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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.

—

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
    • 351df4b201157351c7d26bf12c3eeb9dbce98854 and later · before 8071500a8124e5a6d47d901a8d5ffd91743107a1affected · git
    • 351df4b201157351c7d26bf12c3eeb9dbce98854 and later · before eb02f218aacb36365e0ca2339cbae81fb05d31a5affected · git
    • 351df4b201157351c7d26bf12c3eeb9dbce98854 and later · before 1436031b33fa23ab1ce7df5bc5500093413e8acfaffected · git
    • 351df4b201157351c7d26bf12c3eeb9dbce98854 and later · before b885c7783c19c36c7bf899492a0bffcd68afa8c7affected · git
    • 351df4b201157351c7d26bf12c3eeb9dbce98854 and later · before 89479a27fa4e1e11f378b3724944eabceb84f114affected · git
    • 351df4b201157351c7d26bf12c3eeb9dbce98854 and later · before aa807064473abd6f2cafe419fb77ea402d3e3104affected · git
    • 351df4b201157351c7d26bf12c3eeb9dbce98854 and later · before 8b4468ec023d0d1b4669dfb867588997cc03a06baffected · git
    • before 3.8not affected · semver
    • 5.15.212 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.180-16.1.180-1
Debian:13linuxbefore 6.12.96-16.12.96-1
Debian:14linuxbefore 7.1.5-17.1.5-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-68457Aug 15, 2026 · ksmbd: use opener credentials for FSCTL mutations
    36Monitor
  • ← EarlierCVE-2026-68458Aug 15, 2026 · binder: cache secctx size before release zeroes it
    31Monitor
  • Later →CVE-2026-68460Aug 15, 2026 · f2fs: fix potential deadlock in f2fs_balance_fs()
    0Monitor

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 Linux1436031b33fa23ab1ce7df5bc5500093413e8acfVendor (CNA)
Linux Linux8071500a8124e5a6d47d901a8d5ffd91743107a1Vendor (CNA)
Linux Linux89479a27fa4e1e11f378b3724944eabceb84f114Vendor (CNA)
Linux Linux8b4468ec023d0d1b4669dfb867588997cc03a06bVendor (CNA)
Linux Linuxaa807064473abd6f2cafe419fb77ea402d3e3104Vendor (CNA)
Linux Linuxb885c7783c19c36c7bf899492a0bffcd68afa8c7Vendor (CNA)
Linux Linuxeb02f218aacb36365e0ca2339cbae81fb05d31a5Vendor (CNA)
debian:linux6.1.180-1 · 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.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

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No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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.

Change log

  1. Fix✗ → ✓

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References

Show all references (6 more)

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

All records