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CVE-2023-53802· NVD / CVE Program· CNA Linux

wifi: ath9k: htc_hst: free skb in ath9k_htc_rx_msg() if there is no callback function

Noroxi assessment

Priority: Monitor (action score 0/100)

  • 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: 0.19% (FIRST EPSS).
  • Fixed version: Linux Linux 564bc2222bf50eb6cdee715a5431bf4dc9f923c1, 5a84e51f72580fc70066b03f3dac38421e702a0b, 68171c006c8645a3e0293a6c3e6037c6538ac1c5.

Low priority for now. Upgrade to Linux Linux 564bc2222bf50eb6cdee715a5431bf4dc9f923c1, 5a84e51f72580fc70066b03f3dac38421e702a0b, 68171c006c8645a3e0293a6c3e6037c6538ac1c5 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_hst: free skb in ath9k_htc_rx_msg() if there is no callback function It is stated that ath9k_htc_rx_msg() either frees the provided skb or passes its management to another callback function. However, the skb is not freed in case there is no another callback function, and Syzkaller was able to cause a memory leak. Also minor comment fix. Found by Linux Verification Center (linuxtesting.org) with Syzkaller.

—No exploit Fix available
Published
Dec 8, 2025
Updated
Jun 17, 2026
EPSS
0.1% · 8th percentile
CWE
—

Report tools

JSON

Action score

0

Monitor

Low priority for now.

CVSS
0 / 40 · —
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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When you'll hear from us

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  • when exploit code appears or is weaponized
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  • 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.

—

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 b11f95f65cc52ee3a756e6f6a88df37a203e25bdaffected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 68171c006c8645a3e0293a6c3e6037c6538ac1c5affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 564bc2222bf50eb6cdee715a5431bf4dc9f923c1affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before ec246dfe006b2a8f36353f7489e4f525114db9a5affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before c0c0614f143b568cd0e9525d53cf12e5dcd11987affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 5a84e51f72580fc70066b03f3dac38421e702a0baffected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before bbfababb4f899fe1556eac195f9774b6fe675fb6affected · git
    • fb9987d0f748c983bb795a86f47522313f701a08 and later · before 9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69affected · git
    • before 2.6.35not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.20-16.1.20-1
SUSE:Linux Enterprise Live Patching 12 SP5kernel-defaultbefore 4.12.14-122.296.14.12.14-122.296.1
SUSE:Linux Enterprise Live Patching 12 SP5kgraft-patch-SLE12-SP5_Update_78before 1-8.3.11-8.3.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-sourcebefore 4.12.14-122.296.14.12.14-122.296.1
SUSE:Linux Enterprise Server 12 SP5-LTSSkernel-symsbefore 4.12.14-122.296.14.12.14-122.296.1

Same product

linux: all records

Other highest-scoring records for the same primary product.

  • CVE-2026-74705udp: fix potential use-after-free in tunnel segmentation
    40Plan
  • CVE-2026-74612veth: fix skb length accounting after XDP frag adjustment
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  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan
  • CVE-2026-74279crypto: cavium/cpt - fix DMA cleanup using wrong loop index
    40Plan
  • CVE-2026-72421ipv4: fib: Don't ignore error route in local/main tables.
    40Plan
  • CVE-2026-74309vdpa/octeon_ep: fix IRQ-to-ring mapping in interrupt handler
    40Plan

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 Linux564bc2222bf50eb6cdee715a5431bf4dc9f923c1Vendor (CNA)
Linux Linux5a84e51f72580fc70066b03f3dac38421e702a0bVendor (CNA)
Linux Linux68171c006c8645a3e0293a6c3e6037c6538ac1c5Vendor (CNA)
Linux Linux9b25e3985477ac3f02eca5fc1e0cc6850a3f7e69Vendor (CNA)
Linux Linuxb11f95f65cc52ee3a756e6f6a88df37a203e25bdVendor (CNA)
Linux Linuxbbfababb4f899fe1556eac195f9774b6fe675fb6Vendor (CNA)
Linux Linuxc0c0614f143b568cd0e9525d53cf12e5dcd11987Vendor (CNA)
Linux Linuxec246dfe006b2a8f36353f7489e4f525114db9a5Vendor (CNA)
debian:linux6.1.20-1 · Debian:12Package registry (OSV)
suse:kernel-default4.12.14-122.296.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package registry (OSV)
suse:kernel-source4.12.14-122.296.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kernel-syms4.12.14-122.296.1 · SUSE:Linux Enterprise Server 12 SP5-LTSSPackage registry (OSV)
suse:kgraft-patch-SLE12-SP5_Update_781-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5Package 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.

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

No CVSS vector for this record, so attack conditions can't be derived.

Weakness class (CWE)

—

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 (7 more)

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

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