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NVD / CVE Program· CNA Linux

CVE-2024-49938: wifi: ath9k_htc: Use __skb_set_length() for resetting urb before resubmit

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: 0.25% (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 012ae530afa0785102360de452745d33c99a321b, 2c230210ec0ae6ed08306ac70dc21c24b817bb95, 6a875220670475d9247e576c15dc29823100a4e4; cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.0 5.15.173.1-1; cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.0 5.15.173.1-1.

Low priority for now. Upgrade to Linux Linux 012ae530afa0785102360de452745d33c99a321b, 2c230210ec0ae6ed08306ac70dc21c24b817bb95, 6a875220670475d9247e576c15dc29823100a4e4; cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.0 5.15.173.1-1; cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.0 5.15.173.1-1 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: wifi: ath9k_htc: Use __skb_set_length() for resetting urb before resubmit Syzbot points out that skb_trim() has a sanity check on the existing length of the skb, which can be uninitialised in some error paths. The intent here is clearly just to reset the length to zero before resubmitting, so switch to calling __skb_set_length(skb, 0) directly. In addition, __skb_set_length() already contains a call to skb_reset_tail_pointer(), so remove the redundant call. The syzbot report came from ath9k_hif_usb_reg_in_cb(), but there's a similar usage of skb_trim() in ath9k_hif_usb_rx_cb(), change both while we're at it.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 21, 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.

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-2024-49938

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 kernelbefore 5.10.227
  • linux linux kernel5.11 and later · before 5.15.168
  • linux linux kernel5.16 and later · before 6.1.113
  • linux linux kernel6.2 and later · before 6.6.55
  • linux linux kernel6.7 and later · before 6.10.14
  • linux linux kernel6.11 and later · before 6.11.3

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

    • 2.6.35affected
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before e6b9bf32e0695e4f374674002de0527d2a6768ebaffected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before d1f2fbc6a769081503f6ffedbb5cd1ac497f0e77affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before b02eb7c86ff2ef1411c3095ec8a52b13f68db04faffected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 012ae530afa0785102360de452745d33c99a321baffected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 6a875220670475d9247e576c15dc29823100a4e4affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before e37e348835032d6940ec89308cc8996ded691d2daffected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 2c230210ec0ae6ed08306ac70dc21c24b817bb95affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before a9f4e28e8adaf0715bd4e01462af0a52ee46b01faffected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 94745807f3ebd379f23865e6dab196f220664179affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.115-16.1.115-1
Debian:13linuxbefore 6.11.4-16.11.4-1

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-2024-49926Oct 21, 2024 · rcu-tasks: Fix access non-existent percpu rtpcp variable in rcu_tasks_need_gpcb()
    22Monitor
  • ← EarlierCVE-2024-49930Oct 21, 2024 · wifi: ath11k: fix array out-of-bound access in SoC stats
    31Monitor
  • Later →CVE-2024-49940Oct 21, 2024 · l2tp: prevent possible tunnel refcount underflow
    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 Linux012ae530afa0785102360de452745d33c99a321bVendor (CNA)
Linux Linux2c230210ec0ae6ed08306ac70dc21c24b817bb95Vendor (CNA)
Linux Linux6a875220670475d9247e576c15dc29823100a4e4Vendor (CNA)
Linux Linux94745807f3ebd379f23865e6dab196f220664179Vendor (CNA)
Linux Linuxa9f4e28e8adaf0715bd4e01462af0a52ee46b01fVendor (CNA)
Linux Linuxb02eb7c86ff2ef1411c3095ec8a52b13f68db04fVendor (CNA)
Linux Linuxd1f2fbc6a769081503f6ffedbb5cd1ac497f0e77Vendor (CNA)
Linux Linuxe37e348835032d6940ec89308cc8996ded691d2dVendor (CNA)
Linux Linuxe6b9bf32e0695e4f374674002de0527d2a6768ebVendor (CNA)
cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.173.1-1 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.115-1 · 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-2024-500887 days apartbtrfs: fix uninitialized pointer free in add_inode_ref()
    31Monitor
  • CVE-2024-4684424 days apartum: line: always fill *error_out in setup_one_line()
    31Monitor
  • CVE-2024-5794392 days apartexfat: fix the new buffer was not zeroed before writing
    31Monitor
  • CVE-2024-26799200 days apartASoC: qcom: Fix uninitialized pointer dmactl
    28Monitor
  • CVE-2024-500877 days apartbtrfs: fix uninitialized pointer free on read_alloc_one_name() error
    22Monitor
  • CVE-2024-4227565 days apartdrm/client: Fix error code in drm_client_buffer_vmap_local()
    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-824 · Access of Uninitialized Pointer

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 (12 more)

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

All records