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

CVE-2026-99036: dm: fix reading free memory in do_resume

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: 0.22% (FIRST EPSS).
  • Fixed version: Linux Linux 281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c, 2bc5df0cf906f36a8f59ac864139ee2b7b53d3c0, 2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 281f68d6cf8acb2547ebf0a849b8beae8fb0ec3c, 2bc5df0cf906f36a8f59ac864139ee2b7b53d3c0, 2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82; azl3 kernel 6.6.157.1-1 on Azure Linux 3.0 Release Notes 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: dm: fix reading free memory in do_resume When do_resume calls dm_table_get_mode(new_map), the call is done without holding any locks (it only holds a reference to the md). It may be possible that another concurrent ioctl on the same device will swap table after dm_swap_table and before dm_table_get_mode. In this case, dm_table_get_mode(new_map) reads freed memory. This race condition was triggered by syzbot. This commit fixes the race by reading mode of the new table before dm_swap_table. Note that new_map is also passed to dm_ima_need_measure, but this function doesn't attempt to dereference it, so this call should be safe. Note that this is not a security bug because only root can trigger it and the commonly used tools such as lvm or cryptsetup do not call the ioctls concurrently, so that they can't trigger it acceidentally.

—No exploit Fix available
Published
Oct 23, 2026
Updated
Oct 30, 2026
EPSS
0.2% · 12th 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 · 0.2%

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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

    • 2.6.29affected
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before 2bc5df0cf906f36a8f59ac864139ee2b7b53d3c0affected · git
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before 48169328021dfd59121f9a66cca919b7defcd3faaffected · git
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before 7a272c2338f758e3b6e664ebf7488ac40f48a2a4affected · git
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before 281f68d6cf8acb2547ebf0a849b8beae8fb0ec3caffected · git
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before 2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82affected · git
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before e3bf232c913b7e0103d323f15e6342d37cb1b357affected · git
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before 301691c32b8ad023e3316d5dbb6a8cf52d47b0dcaffected · git
    • d58168763f74d1edbc296d7038c60efe6493fdd4 and later · before c9417c1c5269e2bd0570fbe53e4ec03a8d31f008affected · git
    • before 2.6.29not 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-2026-99034Oct 23, 2026 · mmc: sdhci-sprd: disable runtime PM on remove
    0Monitor
  • ← EarlierCVE-2026-99035Oct 23, 2026 · mmc: mtk-sd: Cancel request timeout work on remove
    0Monitor
  • Later →CVE-2026-99037Oct 23, 2026 · dm-crypt: reject the lmk IV mode with AEAD ciphers
    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 Linux281f68d6cf8acb2547ebf0a849b8beae8fb0ec3cVendor (CNA)
Linux Linux2bc5df0cf906f36a8f59ac864139ee2b7b53d3c0Vendor (CNA)
Linux Linux2c96d1a8324e7736e0f8a5790ecf39d36c2c4a82Vendor (CNA)
Linux Linux301691c32b8ad023e3316d5dbb6a8cf52d47b0dcVendor (CNA)
Linux Linux48169328021dfd59121f9a66cca919b7defcd3faVendor (CNA)
Linux Linux7a272c2338f758e3b6e664ebf7488ac40f48a2a4Vendor (CNA)
Linux Linuxc9417c1c5269e2bd0570fbe53e4ec03a8d31f008Vendor (CNA)
Linux Linuxe3bf232c913b7e0103d323f15e6342d37cb1b357Vendor (CNA)
azl3 kernel 6.6.157.1-1 on Azure Linux 3.0Release 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 3, 2026+11 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.

All records