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NVD / CVE Program· CNA Linux

CVE-2026-43077: crypto: algif_aead - Fix minimum RX size check for decryption

Noroxi assessment

Priority: Monitor (action score 22/100)

  • 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: 0.12% (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 1c76b5675119f694458293a2a81f40731c69bd32, 3afdc15d6173614d7d834517d9b65e7aa5a08548, 3d14bd48e3a77091cbce637a12c2ae31b4a1687c.

Low priority for now. Upgrade to Linux Linux 1c76b5675119f694458293a2a81f40731c69bd32, 3afdc15d6173614d7d834517d9b65e7aa5a08548, 3d14bd48e3a77091cbce637a12c2ae31b4a1687c 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: algif_aead - Fix minimum RX size check for decryption The check for the minimum receive buffer size did not take the tag size into account during decryption. Fix this by adding the required extra length.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
May 6, 2026
Updated
Nov 6, 2026
EPSS
0.1% · 2th percentile
CWE
—

Report tools

JSON

Action score

22

Monitor

Low priority for now.

CVSS
22 / 40 · 5.5 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 0.1%

CISA SSVC decision

Exploitation
none
Automatable
no
Technical impact
partial

Vulnrichment: CISA's decision-tree inputs.

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-2026-43077

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 6.6.136
  • linux linux kernel6.7 and later · before 6.12.83
  • 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
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before 74a66fdb5282d89e348b00c42cfca3a936946d94affected · git
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before fd427dd84f224309afbcc2cb67c7bb770a01265caffected · git
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before 1c76b5675119f694458293a2a81f40731c69bd32affected · git
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before e86ab1e5661386a874fbb8551f0c04b8e9f8ad22affected · git
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before af2fa2fbbced26129813274b8b3f7705f280e174affected · git
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before 78cea133daf721698876e56135049a96d39d610aaffected · git
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before 3afdc15d6173614d7d834517d9b65e7aa5a08548affected · git
    • d887c52d6ae43aeebd249b5f2f1333e60236aa60 and later · before 3d14bd48e3a77091cbce637a12c2ae31b4a1687caffected · 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
AlmaLinux:10kernel-abi-stablelistsbefore 6.12.0-124.55.1.el10_16.12.0-124.55.1.el10_1
AlmaLinux:10kernel-docbefore 6.12.0-124.55.1.el10_16.12.0-124.55.1.el10_1
AlmaLinux:8bpftoolbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernelbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-abi-stablelistsbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-corebefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-cross-headersbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-debugbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-debug-corebefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-debug-develbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-debug-modulesbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-debug-modules-extrabefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-develbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-docbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-headersbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-modulesbefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-modules-extrabefore 4.18.0-553.123.1.el8_104.18.0-553.123.1.el8_10
AlmaLinux:8kernel-rtbefore 4.18.0-553.123.1.rt7.464.el8_104.18.0-553.123.1.rt7.464.el8_10
AlmaLinux:8kernel-rt-corebefore 4.18.0-553.123.1.rt7.464.el8_104.18.0-553.123.1.rt7.464.el8_10
AlmaLinux:8kernel-rt-debugbefore 4.18.0-553.123.1.rt7.464.el8_104.18.0-553.123.1.rt7.464.el8_10
AlmaLinux:8kernel-rt-debug-corebefore 4.18.0-553.123.1.rt7.464.el8_104.18.0-553.123.1.rt7.464.el8_10
AlmaLinux:8kernel-rt-debug-develbefore 4.18.0-553.123.1.rt7.464.el8_104.18.0-553.123.1.rt7.464.el8_10
AlmaLinux:8kernel-rt-debug-modulesbefore 4.18.0-553.123.1.rt7.464.el8_104.18.0-553.123.1.rt7.464.el8_10
AlmaLinux:8kernel-rt-debug-modules-extrabefore 4.18.0-553.123.1.rt7.464.el8_104.18.0-553.123.1.rt7.464.el8_10

+96

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-2026-43283May 6, 2026 · net: ethernet: ec_bhf: Fix dma_free_coherent() dma handle
    35Monitor
  • ← EarlierCVE-2026-43074May 6, 2026 · eventpoll: defer struct eventpoll free to RCU grace period
    31Monitor
  • Later →CVE-2026-43078May 6, 2026 · crypto: af_alg - Fix page reassignment overflow in af_alg_pull_tsgl
    31Monitor

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 Linux1c76b5675119f694458293a2a81f40731c69bd32Vendor (CNA)
Linux Linux3afdc15d6173614d7d834517d9b65e7aa5a08548Vendor (CNA)
Linux Linux3d14bd48e3a77091cbce637a12c2ae31b4a1687cVendor (CNA)
Linux Linux74a66fdb5282d89e348b00c42cfca3a936946d94Vendor (CNA)
Linux Linux78cea133daf721698876e56135049a96d39d610aVendor (CNA)
Linux Linuxaf2fa2fbbced26129813274b8b3f7705f280e174Vendor (CNA)
Linux Linuxe86ab1e5661386a874fbb8551f0c04b8e9f8ad22Vendor (CNA)
Linux Linuxfd427dd84f224309afbcc2cb67c7bb770a01265cVendor (CNA)
almalinux:bpftool4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-abi-stablelists6.12.0-124.55.1.el10_1 · AlmaLinux:10Package registry (OSV)
almalinux:kernel-core4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-cross-headers4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-core4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-devel4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-debug-modules-extra4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-devel4.18.0-553.123.1.el8_10 · AlmaLinux:8Package registry (OSV)
almalinux:kernel-doc6.12.0-124.55.1.el10_1 · AlmaLinux:10Package registry (OSV)
debian:linux6.1.170-1 · Debian:12Package registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-611.54.1.el9_7 · Red Hat:enterprise_linux:9::appstreamPackage registry (OSV)

+16

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

Weakness class (CWE)

—

CVSS vector

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

nvd-primary

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