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NVD / CVE Program· CNA Linux

CVE-2025-40200: Squashfs: reject negative file sizes in squashfs_read_inode()

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 2871c74caa3f4f05b429e6bfefebac62dbf1b408, 54170057a5fadd24a37b70de41e61d39284d9bd7, 8118f66124895829443d09c207e654adcb2f9321; azl3 kernel 6.6.112.1-2 on Azure Linux 3.0 6.6.117.1-1.

Low priority for now. Upgrade to Linux Linux 2871c74caa3f4f05b429e6bfefebac62dbf1b408, 54170057a5fadd24a37b70de41e61d39284d9bd7, 8118f66124895829443d09c207e654adcb2f9321; azl3 kernel 6.6.112.1-2 on Azure Linux 3.0 6.6.117.1-1 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: Squashfs: reject negative file sizes in squashfs_read_inode() Syskaller reports a "WARNING in ovl_copy_up_file" in overlayfs. This warning is ultimately caused because the underlying Squashfs file system returns a file with a negative file size. This commit checks for a negative file size and returns EINVAL. [phillip@squashfs.org.uk: only need to check 64 bit quantity]

—No exploit Fix available
Published
Nov 12, 2025
Updated
Oct 19, 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?

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.

—

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

    • 2.6.29affected
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before 54170057a5fadd24a37b70de41e61d39284d9bd7affected · git
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before 2871c74caa3f4f05b429e6bfefebac62dbf1b408affected · git
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before fbfc745db628de31f5c089147deeb87e95b89e66affected · git
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before 8118f66124895829443d09c207e654adcb2f9321affected · git
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before 8c7aad76751816207fee556d44aa88a710824810affected · git
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before 875fb3f87ae0225b881319ba016a1a8c4ffd5812affected · git
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before f271155ff31aca8ef82c61c8df23ca97e9a77dd4affected · git
    • 6545b246a2c815a8fcd07d58240effb6ec3481b1 and later · before 9f1c14c1de1bdde395f6cc893efa4f80a2ae3b2baffected · git
    • before 2.6.29not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.158-16.1.158-1
Debian:13linuxbefore 6.12.57-16.12.57-1
Debian:14linuxbefore 6.17.6-16.17.6-1

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-2025-40198Nov 12, 2025 · ext4: avoid potential buffer over-read in parse_apply_sb_mount_options()
    31Monitor
  • ← EarlierCVE-2025-40199Nov 12, 2025 · page_pool: Fix PP_MAGIC_MASK to avoid crashing on some 32-bit arches
    31Monitor
  • Later →CVE-2025-40201Nov 12, 2025 · kernel/sys.c: fix the racy usage of task_lock(tsk->group_leader) in sys_prlimit64() paths
    31Monitor

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 Linux2871c74caa3f4f05b429e6bfefebac62dbf1b408Vendor (CNA)
Linux Linux54170057a5fadd24a37b70de41e61d39284d9bd7Vendor (CNA)
Linux Linux8118f66124895829443d09c207e654adcb2f9321Vendor (CNA)
Linux Linux875fb3f87ae0225b881319ba016a1a8c4ffd5812Vendor (CNA)
Linux Linux8c7aad76751816207fee556d44aa88a710824810Vendor (CNA)
Linux Linux9f1c14c1de1bdde395f6cc893efa4f80a2ae3b2bVendor (CNA)
Linux Linuxf271155ff31aca8ef82c61c8df23ca97e9a77dd4Vendor (CNA)
Linux Linuxfbfc745db628de31f5c089147deeb87e95b89e66Vendor (CNA)
azl3 kernel 6.6.112.1-2 on Azure Linux 3.06.6.117.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.158-1 · 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.

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.

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 (7 more)

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

All records