Skip to content
Noroxi
NVD / CVE Program· CNA Linux

CVE-2023-53457: FS: JFS: Fix null-ptr-deref Read in txBegin

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: 0.16% (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 1b4c144767736221cad92c132f72b3c6ed06a0ea, 2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1, 3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3.

Low priority for now. Upgrade to Linux Linux 1b4c144767736221cad92c132f72b3c6ed06a0ea, 2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1, 3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3 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: FS: JFS: Fix null-ptr-deref Read in txBegin Syzkaller reported an issue where txBegin may be called on a superblock in a read-only mounted filesystem which leads to NULL pointer deref. This could be solved by checking if the filesystem is read-only before calling txBegin, and returning with appropiate error code.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 1, 2025
Updated
Nov 5, 2026
EPSS
0.1% · 5th percentile

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 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2023-53457

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

One daily email digest (06:00 UTC); connect a webhook for KEV listings and weaponized exploits instantly.

Your free account also gets you

Running WordPress? Scan your site free with WP Lens

  • Stack alerts: add the products and versions you run, get the new CVEs that affect them
  • Uptime monitoring: 1 site, instant email when it goes down
  • Add your domain: subdomains and takeover risk scanned every week (1 domain)
  • 10 scans an hour on the security tools (3 a day without an account), an API key and MCP
  • All your scans in one panel: findings, what changed in the last scan, a report per domain or per client (PDF, share link)
All free tools

Sign up with email · Have an account? Sign in

Free account, no card. Unfollow any time.

Don't want an account? Get "Exploited this week" by email every MondayDon't want an account? RSS feed for linux records

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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

Affected versions

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

  • linux linux kernel2.6.12.1 and later · before 4.14.324
  • linux linux kernel4.15 and later · before 4.19.293
  • linux linux kernel4.20 and later · before 5.4.255
  • linux linux kernel5.5 and later · before 5.10.192
  • linux linux kernel5.11 and later · before 5.15.123
  • linux linux kernel5.16 and later · before 6.1.42
  • linux linux kernel6.2 and later · before 6.4.7
  • linux linux kernel2.6.12

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

    • 2.6.12affected
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a7225e9e09519deb7e0c42eb6070029cc456e84daffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 1b4c144767736221cad92c132f72b3c6ed06a0eaaffected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before a7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 3e94d0d378d2754b26fc54b429582553f7b53e15affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before fd2db13fb72ff18c633a48229589d42ceb89d1f8affected · git
    • 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 47cfdc338d674d38f4b2f22b7612cc6a2763ba27affected · git
    • before 2.6.12not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.52-16.1.52-1
Debian:13linuxbefore 6.4.11-16.4.11-1

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-2023-53454Oct 1, 2025 · HID: multitouch: Correct devm device reference for hidinput input_dev name
    31Monitor
  • ← EarlierCVE-2023-53456Oct 1, 2025 · scsi: qla4xxx: Add length check when parsing nlattrs
    22Monitor
  • Later →CVE-2023-53458Oct 1, 2025 · media: cx23885: Fix a null-ptr-deref bug in buffer_prepare() and buffer_finish()
    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 Linux1b4c144767736221cad92c132f72b3c6ed06a0eaVendor (CNA)
Linux Linux2a3f20efe6c901d4c0871cfd1d8c65e2ade71fc1Vendor (CNA)
Linux Linux3e5eb6c5ecd8ddb9cfea751cf30f9e23eac97ca3Vendor (CNA)
Linux Linux3e94d0d378d2754b26fc54b429582553f7b53e15Vendor (CNA)
Linux Linux47cfdc338d674d38f4b2f22b7612cc6a2763ba27Vendor (CNA)
Linux Linuxa7225e9e09519deb7e0c42eb6070029cc456e84dVendor (CNA)
Linux Linuxa7d17d6bd7cd4f6940b335ea7a6fce5b6d22adc2Vendor (CNA)
Linux Linuxfd2db13fb72ff18c633a48229589d42ceb89d1f8Vendor (CNA)
debian:linux6.1.52-1 · 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

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)

CWE-476 · NULL Pointer Dereference

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.

Change log

  1. SSVC exploitation— → none
  2. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (7 more)

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

All records