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NVD / CVE Program· CNA Linux

CVE-2023-53595: octeontx2-pf: mcs: Fix NULL pointer dereferences

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: 0.14% (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 1152c0f947b76e7731e039185cbd00fdb4389f00, 13ff119b17e5e2916435ce01a0156c8698ad9e16, 699af748c61574125d269db260dabbe20436d74e.

Low priority for now. Upgrade to Linux Linux 1152c0f947b76e7731e039185cbd00fdb4389f00, 13ff119b17e5e2916435ce01a0156c8698ad9e16, 699af748c61574125d269db260dabbe20436d74e 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: octeontx2-pf: mcs: Fix NULL pointer dereferences When system is rebooted after creating macsec interface below NULL pointer dereference crashes occurred. This patch fixes those crashes by using correct order of teardown [ 3324.406942] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 3324.415726] Mem abort info: [ 3324.418510] ESR = 0x96000006 [ 3324.421557] EC = 0x25: DABT (current EL), IL = 32 bits [ 3324.426865] SET = 0, FnV = 0 [ 3324.429913] EA = 0, S1PTW = 0 [ 3324.433047] Data abort info: [ 3324.435921] ISV = 0, ISS = 0x00000006 [ 3324.439748] CM = 0, WnR = 0 .... [ 3324.575915] Call trace: [ 3324.578353] cn10k_mdo_del_secy+0x24/0x180 [ 3324.582440] macsec_common_dellink+0xec/0x120 [ 3324.586788] macsec_notify+0x17c/0x1c0 [ 3324.590529] raw_notifier_call_chain+0x50/0x70 [ 3324.594965] call_netdevice_notifiers_info+0x34/0x7c [ 3324.599921] rollback_registered_many+0x354/0x5bc [ 3324.604616] unregister_netdevice_queue+0x88/0x10c [ 3324.609399] unregister_netdev+0x20/0x30 [ 3324.613313] otx2_remove+0x8c/0x310 [ 3324.616794] pci_device_shutdown+0x30/0x70 [ 3324.620882] device_shutdown+0x11c/0x204 [ 966.664930] Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 [ 966.673712] Mem abort info: [ 966.676497] ESR = 0x96000006 [ 966.679543] EC = 0x25: DABT (current EL), IL = 32 bits [ 966.684848] SET = 0, FnV = 0 [ 966.687895] EA = 0, S1PTW = 0 [ 966.691028] Data abort info: [ 966.693900] ISV = 0, ISS = 0x00000006 [ 966.697729] CM = 0, WnR = 0 [ 966.833467] Call trace: [ 966.835904] cn10k_mdo_stop+0x20/0xa0 [ 966.839557] macsec_dev_stop+0xe8/0x11c [ 966.843384] __dev_close_many+0xbc/0x140 [ 966.847298] dev_close_many+0x84/0x120 [ 966.851039] rollback_registered_many+0x114/0x5bc [ 966.855735] unregister_netdevice_many.part.0+0x14/0xa0 [ 966.860952] unregister_netdevice_many+0x18/0x24 [ 966.865560] macsec_notify+0x1ac/0x1c0 [ 966.869303] raw_notifier_call_chain+0x50/0x70 [ 966.873738] call_netdevice_notifiers_info+0x34/0x7c [ 966.878694] rollback_registered_many+0x354/0x5bc [ 966.883390] unregister_netdevice_queue+0x88/0x10c [ 966.888173] unregister_netdev+0x20/0x30 [ 966.892090] otx2_remove+0x8c/0x310 [ 966.895571] pci_device_shutdown+0x30/0x70 [ 966.899660] device_shutdown+0x11c/0x204 [ 966.903574] __do_sys_reboot+0x208/0x290 [ 966.907487] __arm64_sys_reboot+0x20/0x30 [ 966.911489] el0_svc_handler+0x80/0x1c0 [ 966.915316] el0_svc+0x8/0x180 [ 966.918362] Code: f9400000 f9400a64 91220014 f94b3403 (f9400060) [ 966.924448] ---[ end trace 341778e799c3d8d7 ]---

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 4, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 3th 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%

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  • 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

Affected versions

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

  • linux linux kernel6.1 and later · before 6.1.29
  • linux linux kernel6.2 and later · before 6.2.16
  • linux linux kernel6.3 and later · before 6.3.3

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

    • 6.1affected
    • c54ffc73601c0a239e55911923a6e23a2a74f143 and later · before a3dcc45eca017fca82ac47dbde6f41af960657e5affected · git
    • c54ffc73601c0a239e55911923a6e23a2a74f143 and later · before 1152c0f947b76e7731e039185cbd00fdb4389f00affected · git
    • c54ffc73601c0a239e55911923a6e23a2a74f143 and later · before 13ff119b17e5e2916435ce01a0156c8698ad9e16affected · git
    • c54ffc73601c0a239e55911923a6e23a2a74f143 and later · before 699af748c61574125d269db260dabbe20436d74eaffected · git
    • before 6.1not affected · semver
    • 6.1.29 and later · up to and including 6.1.*not affected · semver
    • 6.2.16 and later · up to and including 6.2.*not affected · semver
    • 6.3.3 and later · up to and including 6.3.*not affected · semver
    • 6.4 and laternot affected · original_commit_for_fix

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.37-16.1.37-1
Debian:13linuxbefore 6.3.7-16.3.7-1

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-2023-53593Oct 4, 2025 · cifs: Release folio lock on fscache read hit.
    22Monitor
  • ← EarlierCVE-2023-53594Oct 4, 2025 · driver core: fix resource leak in device_add()
    22Monitor
  • Later →CVE-2023-53596Oct 4, 2025 · drivers: base: Free devm resources when unregistering a device
    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 Linux1152c0f947b76e7731e039185cbd00fdb4389f00Vendor (CNA)
Linux Linux13ff119b17e5e2916435ce01a0156c8698ad9e16Vendor (CNA)
Linux Linux699af748c61574125d269db260dabbe20436d74eVendor (CNA)
Linux Linuxa3dcc45eca017fca82ac47dbde6f41af960657e5Vendor (CNA)
debian:linux6.1.37-1 · 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

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. Fix✗ → ✓

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

References

Show all references (3 more)

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

All records