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NVD / CVE Program· CNA Linux

CVE-2025-22063: netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets

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: 0.29% (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 078aabd567de3d63d37d7673f714e309d369e6e2, 172a8a996a337206970467e871dd995ac07640b1, 1927d0bcd5b81e80971bf6b8eba267508bd1c78b; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; cbl2 kernel 5.15.176.3-3 on CBL Mariner 2.0 5.15.180.1-1.

Low priority for now. Upgrade to Linux Linux 078aabd567de3d63d37d7673f714e309d369e6e2, 172a8a996a337206970467e871dd995ac07640b1, 1927d0bcd5b81e80971bf6b8eba267508bd1c78b; azl3 kernel 6.6.85.1-4 on Azure Linux 3.0 6.6.92.2-1; cbl2 kernel 5.15.176.3-3 on CBL Mariner 2.0 5.15.180.1-1 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: netlabel: Fix NULL pointer exception caused by CALIPSO on IPv4 sockets When calling netlbl_conn_setattr(), addr->sa_family is used to determine the function behavior. If sk is an IPv4 socket, but the connect function is called with an IPv6 address, the function calipso_sock_setattr() is triggered. Inside this function, the following code is executed: sk_fullsock(__sk) ? inet_sk(__sk)->pinet6 : NULL; Since sk is an IPv4 socket, pinet6 is NULL, leading to a null pointer dereference. This patch fixes the issue by checking if inet6_sk(sk) returns a NULL pointer before accessing pinet6.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 16, 2025
Updated
Jun 17, 2026
EPSS
0.2% · 22th 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 · 0.2%

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-2025-22063

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

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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 kernel4.8 and later · before 5.4.292
  • linux linux kernel5.5 and later · before 5.10.236
  • linux linux kernel5.11 and later · before 5.15.180
  • linux linux kernel5.16 and later · before 6.1.134
  • linux linux kernel6.2 and later · before 6.6.87
  • linux linux kernel6.7 and later · before 6.12.23
  • linux linux kernel6.13 and later · before 6.13.11
  • linux linux kernel6.14 and later · before 6.14.2

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

    • 4.8affected
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 1ad9166cab6a0f5c0b10344a97bdf749ae11dcbfaffected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 1e38f7a6cdd68377f8a4189b2fbaec14a6dd5152affected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before a7e89541d05b98c79a51c0f95df020f8e82b62edaffected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 797e5371cf55463b4530bab3fef5f27f7c6657a8affected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 1927d0bcd5b81e80971bf6b8eba267508bd1c78baffected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 3ba9cf69de50e8abed32b448616c313baa4c5712affected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 9fe3839588db7519030377b7dee3f165e654f6c5affected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 172a8a996a337206970467e871dd995ac07640b1affected · git
    • ceba1832b1b2da0149c51de62a847c00bca1677a and later · before 078aabd567de3d63d37d7673f714e309d369e6e2affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
AlmaLinux:9kernelbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64kbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-corebefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-debugbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-debug-corebefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-debug-develbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-debug-devel-matchedbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-debug-modulesbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-corebefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-debug-modules-extrabefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-develbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-devel-matchedbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-modulesbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-modules-corebefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-64k-modules-extrabefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-abi-stablelistsbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-corebefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-cross-headersbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-debugbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-debug-corebefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-debug-develbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-debug-devel-matchedbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-debug-modulesbefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8
AlmaLinux:9kernel-debug-modules-corebefore 5.14.0-687.60.1.el9_85.14.0-687.60.1.el9_8

+53

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-2025-22059Apr 16, 2025 · udp: Fix multiple wraparounds of sk->sk_rmem_alloc.
    22Monitor
  • ← EarlierCVE-2025-22061Apr 16, 2025 · net: airoha: Fix qid report in airoha_tc_get_htb_get_leaf_queue()
    22Monitor
  • Later →CVE-2025-22064Apr 16, 2025 · netfilter: nf_tables: don't unregister hook when table is dormant
    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 Linux078aabd567de3d63d37d7673f714e309d369e6e2Vendor (CNA)
Linux Linux172a8a996a337206970467e871dd995ac07640b1Vendor (CNA)
Linux Linux1927d0bcd5b81e80971bf6b8eba267508bd1c78bVendor (CNA)
Linux Linux1ad9166cab6a0f5c0b10344a97bdf749ae11dcbfVendor (CNA)
Linux Linux1e38f7a6cdd68377f8a4189b2fbaec14a6dd5152Vendor (CNA)
Linux Linux3ba9cf69de50e8abed32b448616c313baa4c5712Vendor (CNA)
Linux Linux797e5371cf55463b4530bab3fef5f27f7c6657a8Vendor (CNA)
Linux Linux9fe3839588db7519030377b7dee3f165e654f6c5Vendor (CNA)
Linux Linuxa7e89541d05b98c79a51c0f95df020f8e82b62edVendor (CNA)
azl3 kernel 6.6.85.1-4 on Azure Linux 3.06.6.92.2-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.176.3-3 on CBL Mariner 2.05.15.180.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.176.3-3 on CBL-Mariner 2.05.15.180.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.180.1-1 on CBL Mariner 2.05.15.180.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
almalinux:kernel5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-core5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-core5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-devel-matched5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-core5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-debug-modules-extra5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
almalinux:kernel-64k-devel-matched5.14.0-687.60.1.el9_8 · AlmaLinux:9Package registry (OSV)
debian:linux6.1.135-1 · Debian:12Package registry (OSV)
rocky linux:kernel0:5.14.0-687.60.1.el9_8 · Rocky Linux:9Package 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. Fix✗ → ✓

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

References

Show all references (10 more)

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

All records