NVD / CVE Program· CNA Linux

CVE-2024-46701: libfs: fix infinite directory reads for offset dir

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: 0.18% (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 308b4fc2403b335894592ee9dc212a5e58bb309f, 64a7ce76fb901bf9f9c36cf5d681328fc0fd4b5a.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 308b4fc2403b335894592ee9dc212a5e58bb309f, 64a7ce76fb901bf9f9c36cf5d681328fc0fd4b5a 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: libfs: fix infinite directory reads for offset dir After we switch tmpfs dir operations from simple_dir_operations to simple_offset_dir_operations, every rename happened will fill new dentry to dest dir's maple tree(&SHMEM_I(inode)->dir_offsets->mt) with a free key starting with octx->newx_offset, and then set newx_offset equals to free key + 1. This will lead to infinite readdir combine with rename happened at the same time, which fail generic/736 in xfstests(detail show as below). 1. create 5000 files(1 2 3...) under one dir 2. call readdir(man 3 readdir) once, and get one entry 3. rename(entry, "TEMPFILE"), then rename("TEMPFILE", entry) 4. loop 2~3, until readdir return nothing or we loop too many times(tmpfs break test with the second condition) We choose the same logic what commit 9b378f6ad48cf ("btrfs: fix infinite directory reads") to fix it, record the last_index when we open dir, and do not emit the entry which index >= last_index. The file->private_data now used in offset dir can use directly to do this, and we also update the last_index when we llseek the dir file. [brauner: only update last_index after seek when offset is zero like Jan suggested]

MediumCVSS 5.5 · v3.1—No exploit Fix available

Denial of service

BDU:2025-03766

Published: Sep 13, 2024
Updated: Jun 17, 2026
EPSS: 0.1% · 8th percentile
CWE: CWE-835

Report tools

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.1%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

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Noroxi analysis

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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.

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel

Affected versions

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

linux linux kernel6.6 and later · before 6.10.7
linux linux kernel6.11

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
- 6.6affected
- a2e459555c5f9da3e619b7e47a63f98574dc75f1 and later · before 308b4fc2403b335894592ee9dc212a5e58bb309faffected · git
- a2e459555c5f9da3e619b7e47a63f98574dc75f1 and later · before 64a7ce76fb901bf9f9c36cf5d681328fc0fd4b5aaffected · git
- before 6.6not affected · semver
- 6.10.7 and later · up to and including 6.10.*not affected · semver
- 6.11 and laternot affected · original_commit_for_fix

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:13	linux	before 6.10.7-1	6.10.7-1

Same product

linux: all records

Other highest-scoring records for the same primary product.

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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-2024-46698Sep 13, 2024 · video/aperture: optionally match the device in sysfb_disable()
22Monitor
← EarlierCVE-2024-46699Sep 13, 2024 · drm/v3d: Disable preemption while updating GPU stats
31Monitor
Later →CVE-2024-46702Sep 13, 2024 · thunderbolt: Mark XDomain as unplugged when router is removed
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 / package	Fixed version	Source
Linux Linux	308b4fc2403b335894592ee9dc212a5e58bb309f	Vendor (CNA)
Linux Linux	64a7ce76fb901bf9f9c36cf5d681328fc0fd4b5a	Vendor (CNA)
debian:linux	6.10.7-1 · Debian:13	Package 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.

No history yet (it accumulates with the daily EPSS job).

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

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

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.

CVE-2024-27032135 days apartf2fs: fix to avoid potential panic during recovery
25Monitor
CVE-2022-48635138 days apartfsdax: Fix infinite loop in dax_iomap_rw()
24Monitor
CVE-2024-4382827 days apartext4: fix infinite loop when replaying fast_commit
22Monitor
CVE-2024-4224037 days apartx86/bhi: Avoid warning in #DB handler due to BHI mitigation
22Monitor
CVE-2024-4224637 days apartnet, sunrpc: Remap EPERM in case of connection failure in xs_tcp_setup_socket
22Monitor
CVE-2024-4985638 days apartx86/sgx: Fix deadlock in SGX NUMA node search
22Monitor

Chain candidates

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

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Bug bounty scope

No known public program.

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