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CVE.org (no NVD analysis yet)· CNA Linux

CVE-2026-98208: mmc: sdio_uart: fix xmit_fifo leak when the port table is full

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: 0.17% (FIRST EPSS).
  • Fixed version: Linux Linux 53823e25793a97d07e6e98e0904bbf74cac8bc76, 5e142adbbdc54afbd01fad476c91cded41d22594, 72f4c2b7a48423c708f2c348585419a1b71ab04c; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1.

Low priority for now. Upgrade to Linux Linux 53823e25793a97d07e6e98e0904bbf74cac8bc76, 5e142adbbdc54afbd01fad476c91cded41d22594, 72f4c2b7a48423c708f2c348585419a1b71ab04c; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 6.6.158.1-1 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: mmc: sdio_uart: fix xmit_fifo leak when the port table is full sdio_uart_add_port() allocates the transmit fifo before claiming a slot in sdio_uart_table[]. When all UART_NR slots are taken, it returns -EBUSY with the fifo still allocated, but the probe error path only kfree()s the port, leaking the transmit fifo. Free the fifo in the failure path of sdio_uart_add_port() itself so the function retains nothing on error.

—No exploit Fix available
Published
Oct 6, 2026
Updated
Oct 19, 2026
EPSS
0.1% · 7th 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%

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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When you'll hear from us

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  • when exploit code appears or is weaponized
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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

    • 2.6.34affected
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before 9e992d59138fcfaa4bad7cc0750265b0a8bca100affected · git
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before b97b5b66c93cb4aaf6358727a73fff880a774dfdaffected · git
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before 8a2c1bf209ba04cbd14153a771724bd5aa522fcdaffected · git
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before 72f4c2b7a48423c708f2c348585419a1b71ab04caffected · git
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before fd8223c53ad9553b2a349d2a40e19bbc6e60fc48affected · git
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before ac866db277a4c73e84b4263773652e3aba326249affected · git
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before 5e142adbbdc54afbd01fad476c91cded41d22594affected · git
    • 8b197a5ce7a7218bb9fc721647ba0d5734f27348 and later · before 53823e25793a97d07e6e98e0904bbf74cac8bc76affected · git
    • before 2.6.34not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.190-16.1.190-1
Debian:12linux-6.12before 6.12.113-1~deb12u16.12.113-1~deb12u1
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.8-17.2.8-1

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
    40Plan
  • CVE-2026-74475vxlan: use neigh_ha_snapshot() in route_shortcircuit()
    40Plan

Published before and after this one in the same product

  • ← EarlierCVE-2026-98206Oct 6, 2026 · Input: cyttsp5 - clamp the HID report size before memcpy
    0Monitor
  • ← EarlierCVE-2026-98207Oct 6, 2026 · mmc: spi: reset bytes_xfered before retrying CRC failures
    0Monitor
  • Later →CVE-2026-98209Oct 6, 2026 · mmc: sdhci-of-aspeed: Remove children before releasing SDC resources
    0Monitor

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 Linux53823e25793a97d07e6e98e0904bbf74cac8bc76Vendor (CNA)
Linux Linux5e142adbbdc54afbd01fad476c91cded41d22594Vendor (CNA)
Linux Linux72f4c2b7a48423c708f2c348585419a1b71ab04cVendor (CNA)
Linux Linux8a2c1bf209ba04cbd14153a771724bd5aa522fcdVendor (CNA)
Linux Linux9e992d59138fcfaa4bad7cc0750265b0a8bca100Vendor (CNA)
Linux Linuxac866db277a4c73e84b4263773652e3aba326249Vendor (CNA)
Linux Linuxb97b5b66c93cb4aaf6358727a73fff880a774dfdVendor (CNA)
Linux Linuxfd8223c53ad9553b2a349d2a40e19bbc6e60fc48Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.06.6.158.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.1.190-1 · Debian:12Package registry (OSV)
debian:linux6.12.113-1 · Debian:13Package registry (OSV)
debian:linux7.2.8-1 · Debian:14Package registry (OSV)
debian:linux-6.126.12.113-1~deb12u1 · 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.

  1. Published
  2. Fix recordedsame day
  3. TodayNov 9, 2026+34 d
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. Exploit maturity— → none
  2. 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.

All records