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NVD / CVE Program· CNA Linux

CVE-2026-43078: crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl

HighCVSS 7.8 · v3.1—No exploit Fix available

Noroxi assessment

Priority: Monitor (action score 31/100)

  • 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: 0.13% (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 2b781d1d4f933990318bcc5c68fb75a717379e42, 31d00156e50ecad37f2cb6cbf04aaa9a260505ef, 710a4ce5d7afd9fe082c75dec282ab4a11c0fe71.

Low priority for now. Upgrade to Linux Linux 2b781d1d4f933990318bcc5c68fb75a717379e42, 31d00156e50ecad37f2cb6cbf04aaa9a260505ef, 710a4ce5d7afd9fe082c75dec282ab4a11c0fe71 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: crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl When page reassignment was added to af_alg_pull_tsgl the original loop wasn't updated so it may try to reassign one more page than necessary. Add the check to the reassignment so that this does not happen. Also update the comment which still refers to the obsolete offset argument.

Published
May 6, 2026
Updated
Nov 11, 2026
EPSS
0.1% · 2th percentile

Report tools

JSON

Action score

31

Monitor

Low priority for now.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · Linux
7.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

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-2026-43078

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 kernel4.14.1 and later · before 5.10.254
  • linux linux kernel5.11 and later · before 5.15.204
  • linux linux kernel5.16 and later · before 6.1.170
  • linux linux kernel6.2 and later · before 6.6.137
  • linux linux kernel6.7 and later · before 6.12.85
  • linux linux kernel6.13 and later · before 6.18.24
  • linux linux kernel6.19 and later · before 6.19.14
  • linux linux kernel4.14
  • linux linux kernel7.0

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

    • 4.14affected
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before fa48d3ea9cdbfb28c1fd6756c6c5cd01351aa51eaffected · git
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before 2b781d1d4f933990318bcc5c68fb75a717379e42affected · git
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before f7826bc0b39928a4a22f6b815dd9940b22a63503affected · git
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before 710a4ce5d7afd9fe082c75dec282ab4a11c0fe71affected · git
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before c8369a6d62f5abde9cbd4b62c45bf4b996be2468affected · git
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before dea5fcf085f977b6c2de1b2d4ec4767b6c840d1faffected · git
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before 9532501e0f1b200ea80baa0e33e0b06da10bb271affected · git
    • e870456d8e7c8d57c059ea479b5aadbb55ff4c3a and later · before 31d00156e50ecad37f2cb6cbf04aaa9a260505efaffected · git
    • before 4.14not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.170-16.1.170-1
Debian:13linuxbefore 6.12.85-16.12.85-1
Debian:14linuxbefore 6.19.14-16.19.14-1

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-2026-43076May 6, 2026 · ocfs2: validate inline data i_size during inode read
    31Monitor
  • ← EarlierCVE-2026-43077May 6, 2026 · crypto: algif_aead - Fix minimum RX size check for decryption
    22Monitor
  • Later →CVE-2026-43079May 6, 2026 · perf/x86/intel/uncore: Skip discovery table for offline dies
    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 Linux2b781d1d4f933990318bcc5c68fb75a717379e42Vendor (CNA)
Linux Linux31d00156e50ecad37f2cb6cbf04aaa9a260505efVendor (CNA)
Linux Linux710a4ce5d7afd9fe082c75dec282ab4a11c0fe71Vendor (CNA)
Linux Linux9532501e0f1b200ea80baa0e33e0b06da10bb271Vendor (CNA)
Linux Linuxc8369a6d62f5abde9cbd4b62c45bf4b996be2468Vendor (CNA)
Linux Linuxdea5fcf085f977b6c2de1b2d4ec4767b6c840d1fVendor (CNA)
Linux Linuxf7826bc0b39928a4a22f6b815dd9940b22a63503Vendor (CNA)
Linux Linuxfa48d3ea9cdbfb28c1fd6756c6c5cd01351aa51eVendor (CNA)
debian:linux6.1.170-1 · 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.

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

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
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Local
Attack complexity
Low
Privileges required
Low
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-787 · Out-of-bounds Write

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

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. SSVC exploitation— → 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