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

CVE-2026-99035: mmc: mtk-sd: Cancel request timeout work on remove

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 2cff6a2a912a3464ae1fefb7e0a82393682ccea6, 46e75703ca3f00fb8c935b3ce35b90836e34e8af, 9e799f25c420e759641eb25102967ea091fc758f; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 2cff6a2a912a3464ae1fefb7e0a82393682ccea6, 46e75703ca3f00fb8c935b3ce35b90836e34e8af, 9e799f25c420e759641eb25102967ea091fc758f; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes; azl3 kernel 6.6.159.1-1 on Azure Linux 3.0 6.6.161.1-1 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: mtk-sd: Cancel request timeout work on remove The driver queues req_timeout while a request is active. msdc_request_done() uses cancel_delayed_work(), which does not wait for a timeout callback that has already started. The timeout callback calls mmc_request_done(), which wakes the request waiter, and then continues to use host->dev_comp and check the SDIO IRQ. During unbind, msdc_drv_remove() can return and the managed mmc_host can be freed before the callback finishes. KASAN reported use-after-free accesses in msdc_request_done() and msdc_recheck_sdio_irq() in each of three unbind tests. The same tests completed without a kernel diagnostic after this change. Call cancel_delayed_work_sync() after mmc_remove_host() has stopped new requests and before the driver releases the host resources.

—No exploit Fix available
Published
Oct 23, 2026
Updated
Oct 30, 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%

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  • A fix has been released

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Noroxi analysis

What does it mean in your environment?

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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

    • 4.2affected
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before d8ce81006ee4e42ce2d0bd3a2ab87adc1e24ef11affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 2cff6a2a912a3464ae1fefb7e0a82393682ccea6affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before e5d82695f2cabca3222b8f6a89ea0e18bafc4c0aaffected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 9e799f25c420e759641eb25102967ea091fc758faffected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before f37e0367ad6f2147a0b37564b442b7a25bec0d23affected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before 46e75703ca3f00fb8c935b3ce35b90836e34e8afaffected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before edef1355224c0799a502a46b71d3649fa0dd218eaffected · git
    • 208489032bdd8d4a7de50f3057c175058f271956 and later · before b38af5386a74416e898955443f2e26547b358cb2affected · git
    • before 4.2not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxfrom 0—
Debian:13linuxbefore 6.12.113-16.12.113-1
Debian:14linuxbefore 7.2.11-17.2.11-1

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-2026-99033Oct 23, 2026 · net/packet: guard the ll header push in packet_rcv_spkt()
    0Monitor
  • ← EarlierCVE-2026-99034Oct 23, 2026 · mmc: sdhci-sprd: disable runtime PM on remove
    0Monitor
  • Later →CVE-2026-99036Oct 23, 2026 · dm: fix reading free memory in do_resume
    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 Linux2cff6a2a912a3464ae1fefb7e0a82393682ccea6Vendor (CNA)
Linux Linux46e75703ca3f00fb8c935b3ce35b90836e34e8afVendor (CNA)
Linux Linux9e799f25c420e759641eb25102967ea091fc758fVendor (CNA)
Linux Linuxb38af5386a74416e898955443f2e26547b358cb2Vendor (CNA)
Linux Linuxd8ce81006ee4e42ce2d0bd3a2ab87adc1e24ef11Vendor (CNA)
Linux Linuxe5d82695f2cabca3222b8f6a89ea0e18bafc4c0aVendor (CNA)
Linux Linuxedef1355224c0799a502a46b71d3649fa0dd218eVendor (CNA)
Linux Linuxf37e0367ad6f2147a0b37564b442b7a25bec0d23Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release NotesMicrosoft (MSRC)
azl3 kernel 6.6.159.1-1 on Azure Linux 3.06.6.161.1-1 · Release NotesMicrosoft (MSRC)
debian:linux6.12.113-1 · Debian:13Package 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 8, 2026+16 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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

All national notices →

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.

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