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NVD / CVE Program· CNA Linux

CVE-2024-35982: batman-adv: Avoid infinite loop trying to resize local TT

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: 0.26% (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 04720ea2e6c64459a90ca28570ea78335eccd924, 3fe79b2c83461edbbf86ed8a6f3924820ff89259, 4ca2a5fb54ea2cc43edea614207fcede562d91c2; azl3 kernel 6.6.22.1-2 on Azure Linux 3.0 6.6.35.1-5; azl3 kernel 6.6.35.1-5 on Azure Linux 3.0 -.

Low priority for now. Upgrade to Linux Linux 04720ea2e6c64459a90ca28570ea78335eccd924, 3fe79b2c83461edbbf86ed8a6f3924820ff89259, 4ca2a5fb54ea2cc43edea614207fcede562d91c2; azl3 kernel 6.6.22.1-2 on Azure Linux 3.0 6.6.35.1-5; azl3 kernel 6.6.35.1-5 on Azure Linux 3.0 - 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: batman-adv: Avoid infinite loop trying to resize local TT If the MTU of one of an attached interface becomes too small to transmit the local translation table then it must be resized to fit inside all fragments (when enabled) or a single packet. But if the MTU becomes too low to transmit even the header + the VLAN specific part then the resizing of the local TT will never succeed. This can for example happen when the usable space is 110 bytes and 11 VLANs are on top of batman-adv. In this case, at least 116 byte would be needed. There will just be an endless spam of batman_adv: batadv0: Forced to purge local tt entries to fit new maximum fragment MTU (110) in the log but the function will never finish. Problem here is that the timeout will be halved all the time and will then stagnate at 0 and therefore never be able to reduce the table even more. There are other scenarios possible with a similar result. The number of BATADV_TT_CLIENT_NOPURGE entries in the local TT can for example be too high to fit inside a packet. Such a scenario can therefore happen also with only a single VLAN + 7 non-purgable addresses - requiring at least 120 bytes. While this should be handled proactively when: * interface with too low MTU is added * VLAN is added * non-purgeable local mac is added * MTU of an attached interface is reduced * fragmentation setting gets disabled (which most likely requires dropping attached interfaces) not all of these scenarios can be prevented because batman-adv is only consuming events without the the possibility to prevent these actions (non-purgable MAC address added, MTU of an attached interface is reduced). It is therefore necessary to also make sure that the code is able to handle also the situations when there were already incompatible system configuration are present.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 20, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 17th 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.

CNA vs NVD score

NVD
5.5
CNA · Linux
5.1
0.4 point gap

CVSS:3.1/AV:L/AC:H/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

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Follow CVE-2024-35982

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 kernel3.13 and later · before 4.19.313
  • linux linux kernel4.20 and later · before 5.4.275
  • linux linux kernel5.5 and later · before 5.10.216
  • linux linux kernel5.11 and later · before 5.15.156
  • linux linux kernel5.16 and later · before 6.1.87
  • linux linux kernel6.2 and later · before 6.6.28
  • linux linux kernel6.7 and later · before 6.8.7

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

    • 3.13affected
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before 04720ea2e6c64459a90ca28570ea78335eccd924affected · git
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before b3ddf6904073990492454b1dd1c10a24be8c74c6affected · git
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before 70a8be9dc2fb65d67f8c1e0c88c587e08e2e575daffected · git
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before 87b6af1a7683e021710c08fc0551fc078346032faffected · git
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before 3fe79b2c83461edbbf86ed8a6f3924820ff89259affected · git
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before 4ca2a5fb54ea2cc43edea614207fcede562d91c2affected · git
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before ca54e2671548616ad34885f90d4f26f7adb088f0affected · git
    • a19d3d85e1b854e4a483a55d740a42458085560d and later · before b1f532a3b1e6d2e5559c7ace49322922637a28aaaffected · git
    • before 3.13not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.90-16.1.90-1
Debian:13linuxbefore 6.8.9-16.8.9-1

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-2024-35976May 20, 2024 · xsk: validate user input for XDP_{UMEM|COMPLETION}_FILL_RING
    28Monitor
  • ← EarlierCVE-2024-35978May 20, 2024 · Bluetooth: Fix memory leak in hci_req_sync_complete()
    22Monitor
  • Later →CVE-2024-35983May 20, 2024 · bounds: Use the right number of bits for power-of-two CONFIG_NR_CPUS
    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 Linux04720ea2e6c64459a90ca28570ea78335eccd924Vendor (CNA)
Linux Linux3fe79b2c83461edbbf86ed8a6f3924820ff89259Vendor (CNA)
Linux Linux4ca2a5fb54ea2cc43edea614207fcede562d91c2Vendor (CNA)
Linux Linux70a8be9dc2fb65d67f8c1e0c88c587e08e2e575dVendor (CNA)
Linux Linux87b6af1a7683e021710c08fc0551fc078346032fVendor (CNA)
Linux Linuxb1f532a3b1e6d2e5559c7ace49322922637a28aaVendor (CNA)
Linux Linuxb3ddf6904073990492454b1dd1c10a24be8c74c6Vendor (CNA)
Linux Linuxca54e2671548616ad34885f90d4f26f7adb088f0Vendor (CNA)
azl3 kernel 6.6.22.1-2 on Azure Linux 3.06.6.35.1-5 · CBL-Mariner ReleasesMicrosoft (MSRC)
azl3 kernel 6.6.35.1-5 on Azure Linux 3.0- · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.153.1-2 on CBL Mariner 2.05.15.158.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.158.1-1 on CBL Mariner 2.05.15.158.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.90-1 · 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.

  • CVE-2024-2703219 days apartf2fs: fix to avoid potential panic during recovery
    25Monitor
  • CVE-2022-4863522 days apartfsdax: Fix infinite loop in dax_iomap_rw()
    24Monitor
  • CVE-2024-359810 days apartvirtio_net: Do not send RSS key if it is not supported
    22Monitor
  • CVE-2021-474061 days apartext4: add error checking to ext4_ext_replay_set_iblocks()
    22Monitor
  • CVE-2021-474482 days apartmptcp: fix possible stall on recvmsg()
    22Monitor
  • CVE-2021-4761731 days apartPCI: pciehp: Fix infinite loop in IRQ handler upon power fault
    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-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 (10 more)

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

All records