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NVD / CVE Program· CNA Linux

CVE-2025-38588: ipv6: prevent infinite loop in rt6_nlmsg_size()

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 3c13db3e47e170bab19e574404e7b6be45ea873d, 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab, 54e6fe9dd3b0e7c481c2228782c9494d653546da.

Low priority for now. Upgrade to Linux Linux 3c13db3e47e170bab19e574404e7b6be45ea873d, 46aeb66e9e54ed0d56c18615e1c3dbd502b327ab, 54e6fe9dd3b0e7c481c2228782c9494d653546da 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: ipv6: prevent infinite loop in rt6_nlmsg_size() While testing prior patch, I was able to trigger an infinite loop in rt6_nlmsg_size() in the following place: list_for_each_entry_rcu(sibling, &f6i->fib6_siblings, fib6_siblings) { rt6_nh_nlmsg_size(sibling->fib6_nh, &nexthop_len); } This is because fib6_del_route() and fib6_add_rt2node() uses list_del_rcu(), which can confuse rcu readers, because they might no longer see the head of the list. Restart the loop if f6i->fib6_nsiblings is zero.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Aug 19, 2025
Updated
Jun 17, 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%

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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
debiandebian linux

Affected versions

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

  • debian debian linux11.0
  • linux linux kernel6.6.75 and later · before 6.6.102
  • linux linux kernel6.11.11 and later · before 6.12
  • linux linux kernel6.1.128 and later · before 6.1.148
  • linux linux kernel6.13 and later · before 6.15.10
  • linux linux kernel6.16 and later · before 6.16.1
  • linux linux kernel6.12.2 and later · before 6.12.42

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

    • 11edcd026012ac18acee0f1514db3ed1b160fc6f, 6.13affected
    • d0ec61c9f3583b76aebdbb271f5c0d3fcccd48b2 and later · before 6d345136c9b875f065d226908a29c25cdf9343f8affected · git
    • 52da02521ede55fb86546c3fffd9377b3261b91f and later · before e1b7932af47f92432be8303d2439d1bf77b0be23affected · git
    • 34a949e7a0869dfa31a40416d2a56973fae1807b and later · before cd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38affected · git
    • d9ccb18f83ea2bb654289b6ecf014fd267cc988b and later · before 3c13db3e47e170bab19e574404e7b6be45ea873daffected · git
    • d9ccb18f83ea2bb654289b6ecf014fd267cc988b and later · before 46aeb66e9e54ed0d56c18615e1c3dbd502b327abaffected · git
    • d9ccb18f83ea2bb654289b6ecf014fd267cc988b and later · before 54e6fe9dd3b0e7c481c2228782c9494d653546daaffected · git
    • 6.1.128 and later · before 6.1.148affected · semver
    • 6.6.75 and later · before 6.6.102affected · semver
    • 6.12.2 and later · before 6.12.42affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.148-16.1.148-1
Debian:13linuxbefore 6.12.43-16.12.43-1
Debian:14linuxbefore 6.16.3-16.16.3-1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_10before 11-150600.2.111-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_13before 9-150600.2.19-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_6before 17-150600.2.117-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_7before 17-150600.2.117-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP6kernel-livepatch-SLE15-SP6_Update_8before 12-150600.2.112-150600.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_0before 9-150700.3.24.19-150700.3.24.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7_Update_1before 9-150700.2.19-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_0before 9-150700.3.19-150700.3.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_1before 9-150700.2.19-150700.2.1
SUSE:Linux Enterprise Live Patching 15 SP7kernel-livepatch-SLE15-SP7-RT_Update_2before 9-150700.2.19-150700.2.1
SUSE:Linux Enterprise Server 16.0kernel-livepatch-SLE16_Update_0before 5-160000.4.35-160000.4.3
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_4before 16-1.216-1.2
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_4before 15-1.215-1.2
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_5before 14-1.214-1.2
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_5before 13-1.213-1.2
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_6before 12-3.112-3.1
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_6before 11-3.111-3.1
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_7before 10-1.210-1.2
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_7before 11-1.211-1.2
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_8before 10-1.210-1.2
SUSE:Linux Micro 6.0kernel-livepatch-MICRO-6-0_Update_8before 11-1.211-1.2

+10

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-2025-38585Aug 19, 2025 · staging: media: atomisp: Fix stack buffer overflow in gmin_get_var_int()
    31Monitor
  • ← EarlierCVE-2025-38587Aug 19, 2025 · ipv6: fix possible infinite loop in fib6_info_uses_dev()
    22Monitor
  • Later →CVE-2025-38589Aug 19, 2025 · neighbour: Fix null-ptr-deref in neigh_flush_dev().
    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 Linux3c13db3e47e170bab19e574404e7b6be45ea873dVendor (CNA)
Linux Linux46aeb66e9e54ed0d56c18615e1c3dbd502b327abVendor (CNA)
Linux Linux54e6fe9dd3b0e7c481c2228782c9494d653546daVendor (CNA)
Linux Linux6.1.148Vendor (CNA)
Linux Linux6.12Vendor (CNA)
Linux Linux6.12.42Vendor (CNA)
Linux Linux6.6.102Vendor (CNA)
Linux Linux6d345136c9b875f065d226908a29c25cdf9343f8Vendor (CNA)
Linux Linuxcd8d8bbd9ced4cc5d06d858f67d4aa87745e8f38Vendor (CNA)
Linux Linuxe1b7932af47f92432be8303d2439d1bf77b0be23Vendor (CNA)
debian:linux6.1.148-1 · Debian:12Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_1011-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_139-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_617-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_717-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP6_Update_812-150600.2.1 · SUSE:Linux Enterprise Live Patching 15 SP6Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7_Update_09-150700.3.24.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7_Update_19-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_09-150700.3.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_19-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE15-SP7-RT_Update_29-150700.2.1 · SUSE:Linux Enterprise Live Patching 15 SP7Package registry (OSV)
suse:kernel-livepatch-SLE16_Update_05-160000.4.3 · SUSE:Linux Enterprise Server 16.0Package registry (OSV)
suse:kernel-livepatch-SLE16-RT_Update_04-160000.3.4 · SUSE:Linux Micro 6.2Package 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-2026-31448246 days apartext4: avoid infinite loops caused by residual data
    37Monitor
  • CVE-2026-52933309 days apartio_uring/poll: fix signed comparison in io_poll_get_ownership()
    31Monitor
  • CVE-2026-23451227 days apartbonding: prevent potential infinite loop in bond_header_parse()
    30Monitor
  • CVE-2026-31552248 days apartwifi: wlcore: Return -ENOMEM instead of -EAGAIN if there is not enough headroom
    30Monitor
  • CVE-2026-46052281 days apartceph: only d_add() negative dentries when they are unhashed
    30Monitor
  • CVE-2026-64148334 days apartpds_core: fix error handling in pdsc_devcmd_wait
    30Monitor

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-835 · Loop with Unreachable Exit Condition ('Infinite Loop')

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 (6 more)

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

All records