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NVD / CVE Program· CNA Linux

CVE-2026-22997: net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts

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: 0.46% (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.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: Linux Linux 1809c82aa073a11b7d335ae932d81ce51a588a4a, 6121b7564c725b632ffe4764abe85aa239d37703, 809a437e27a3bf3c1c6c8c157773635552116f2b; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.
  • Severity is disputed: the assigning authority (CNA) scores it 7.5, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 1809c82aa073a11b7d335ae932d81ce51a588a4a, 6121b7564c725b632ffe4764abe85aa239d37703, 809a437e27a3bf3c1c6c8c157773635552116f2b; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 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: net: can: j1939: j1939_xtp_rx_rts_session_active(): deactivate session upon receiving the second rts Since j1939_session_deactivate_activate_next() in j1939_tp_rxtimer() is called only when the timer is enabled, we need to call j1939_session_deactivate_activate_next() if we cancelled the timer. Otherwise, refcount for j1939_session leaks, which will later appear as | unregister_netdevice: waiting for vcan0 to become free. Usage count = 2. problem.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jan 25, 2026
Updated
Oct 19, 2026
EPSS
0.4% · 40th 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 · 0.4%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
5.5
CNA · Linux
7.5
2.0 point gap

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2026-22997

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 kernel5.4 and later · before 5.10.249
  • linux linux kernel5.11 and later · before 5.15.199
  • linux linux kernel5.16 and later · before 6.1.162
  • linux linux kernel6.2 and later · before 6.6.122
  • linux linux kernel6.7 and later · before 6.12.67
  • linux linux kernel6.13 and later · before 6.18.7
  • linux linux kernel6.19

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

    • 5.4affected
    • 9d71dd0c70099914fcd063135da3c580865e924c and later · before a73e7d7e346dae1c22dc3e95b02ca464b12daf2caffected · git
    • 9d71dd0c70099914fcd063135da3c580865e924c and later · before adabf01c19561e42899da9de56a6a1da0e6b8a5baffected · git
    • 9d71dd0c70099914fcd063135da3c580865e924c and later · before b1d67607e97d489c0cfbbf55f48a76b00710b0e4affected · git
    • 9d71dd0c70099914fcd063135da3c580865e924c and later · before 809a437e27a3bf3c1c6c8c157773635552116f2baffected · git
    • 9d71dd0c70099914fcd063135da3c580865e924c and later · before cb2a610867bc379988bae0bb4b8bbc59c0decf1aaffected · git
    • 9d71dd0c70099914fcd063135da3c580865e924c and later · before 6121b7564c725b632ffe4764abe85aa239d37703affected · git
    • 9d71dd0c70099914fcd063135da3c580865e924c and later · before 1809c82aa073a11b7d335ae932d81ce51a588a4aaffected · git
    • before 5.4not affected · semver
    • 5.10.249 and later · up to and including 5.10.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.162-16.1.162-1
Debian:13linuxbefore 6.12.69-16.12.69-1
Debian:14linuxbefore 6.18.8-16.18.8-1

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-2025-71163Jan 25, 2026 · dmaengine: idxd: fix device leaks on compat bind and unbind
    22Monitor
  • ← EarlierCVE-2026-22996Jan 25, 2026 · net/mlx5e: Don't store mlx5e_priv in mlx5e_dev devlink priv
    22Monitor
  • Later →CVE-2026-22998Jan 25, 2026 · nvme-tcp: fix NULL pointer dereferences in nvmet_tcp_build_pdu_iovec
    30Monitor

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 Linux1809c82aa073a11b7d335ae932d81ce51a588a4aVendor (CNA)
Linux Linux6121b7564c725b632ffe4764abe85aa239d37703Vendor (CNA)
Linux Linux809a437e27a3bf3c1c6c8c157773635552116f2bVendor (CNA)
Linux Linuxa73e7d7e346dae1c22dc3e95b02ca464b12daf2cVendor (CNA)
Linux Linuxadabf01c19561e42899da9de56a6a1da0e6b8a5bVendor (CNA)
Linux Linuxb1d67607e97d489c0cfbbf55f48a76b00710b0e4Vendor (CNA)
Linux Linuxcb2a610867bc379988bae0bb4b8bbc59c0decf1aVendor (CNA)
cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.05.15.200.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.162-1 · 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.

  • CVE-2026-64003175 days apartscsi: core: Run queues for all non-SDEV_DEL devices from scsi_run_host_queues
    30Monitor
  • CVE-2022-50189221 days aparttools/power turbostat: Fix file pointer leak
    28Monitor
  • CVE-2025-7123224 days apartscsi: qla2xxx: Free sp in error path to fix system crash
    22Monitor
  • CVE-2026-2321924 days apartmm/slab: Add alloc_tagging_slab_free_hook for memcg_alloc_abort_single
    22Monitor
  • CVE-2026-2329959 days apartBluetooth: purge error queues in socket destructors
    22Monitor
  • CVE-2026-4305496 days apartscsi: target: tcm_loop: Drain commands in target_reset handler
    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.

—

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-772 · Missing Release of Resource after Effective Lifetime

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.

Attack patterns (CAPEC)

Change log

  1. Fix✗ → ✓

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

References

Show all references (6 more)

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

All records