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NVD / CVE Program· CNA Linux

CVE-2024-26832: mm: zswap: fix missing folio cleanup in writeback race path

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: 0.22% (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 14f1992430ef9e647b02aa8ca12c5bcb9a1dffea, 6.1.80, 6.4.

Low priority for now. Upgrade to Linux Linux 14f1992430ef9e647b02aa8ca12c5bcb9a1dffea, 6.1.80, 6.4 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: mm: zswap: fix missing folio cleanup in writeback race path In zswap_writeback_entry(), after we get a folio from __read_swap_cache_async(), we grab the tree lock again to check that the swap entry was not invalidated and recycled. If it was, we delete the folio we just added to the swap cache and exit. However, __read_swap_cache_async() returns the folio locked when it is newly allocated, which is always true for this path, and the folio is ref'd. Make sure to unlock and put the folio before returning. This was discovered by code inspection, probably because this path handles a race condition that should not happen often, and the bug would not crash the system, it will only strand the folio indefinitely.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Apr 17, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 12th percentile

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 · 0.2%

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-2024-26832

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 kernel6.1.30 and later · before 6.1.80
  • linux linux kernel6.4 and later · before 6.6.19
  • linux linux kernel6.7 and later · before 6.7.7
  • linux linux kernel6.3.4
  • linux linux kernel6.8

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

    • ba700ea13bf0105a4773c654f7d3bef8adb64ab2, 6.4affected
    • 2cab13f500a6333bd2b853783ac76be9e4956f8a and later · before 14f1992430ef9e647b02aa8ca12c5bcb9a1dffeaaffected · git
    • 04fc7816089c5a32c29a04ec94b998e219dfb946 and later · before 6156277d1b26cb3fdb6fcbf0686ab78268571644affected · git
    • 04fc7816089c5a32c29a04ec94b998e219dfb946 and later · before e2891c763aa2cff74dd6b5e978411ccf0cf94abeaffected · git
    • 04fc7816089c5a32c29a04ec94b998e219dfb946 and later · before e3b63e966cac0bf78aaa1efede1827a252815a1daffected · git
    • 6.1.30 and later · before 6.1.80affected · semver
    • 6.3.4 and later · before 6.4affected · semver
    • before 6.4not affected · semver
    • 6.1.80 and later · up to and including 6.1.*not affected · semver
    • 6.6.19 and later · up to and including 6.6.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.82-16.1.82-1
Debian:13linuxbefore 6.7.7-16.7.7-1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-64kbbefore 5.14.21-150500.55.136.15.14.21-150500.55.136.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-docsbefore 5.14.21-150500.55.136.15.14.21-150500.55.136.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-obs-buildbefore 5.14.21-150500.55.136.15.14.21-150500.55.136.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-symsbefore 5.14.21-150500.55.136.15.14.21-150500.55.136.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_35before 1-150500.11.3.11-150500.11.3.1
SUSE:Linux Enterprise Micro 5.2kernel-defaultbefore 5.3.18-150300.59.235.15.3.18-150300.59.235.1
SUSE:Linux Enterprise Micro 5.2kernel-default-basebefore 5.3.18-150300.59.235.1.150300.18.140.15.3.18-150300.59.235.1.150300.18.140.1
SUSE:Linux Enterprise Micro 5.2kernel-rtbefore 5.3.18-150300.235.15.3.18-150300.235.1
SUSE:Linux Enterprise Micro 5.2kernel-source-rtbefore 5.3.18-150300.235.15.3.18-150300.235.1
SUSE:Linux Enterprise Micro 5.3kernel-rtbefore 5.14.21-150400.15.145.15.14.21-150400.15.145.1
SUSE:Linux Enterprise Micro 5.3kernel-source-rtbefore 5.14.21-150400.15.145.15.14.21-150400.15.145.1
SUSE:Linux Enterprise Micro 5.5kernel-defaultbefore 5.14.21-150500.55.136.15.14.21-150500.55.136.1
SUSE:Linux Enterprise Micro 5.5kernel-default-basebefore 5.14.21-150500.55.136.1.150500.6.67.15.14.21-150500.55.136.1.150500.6.67.1
SUSE:Linux Enterprise Micro 5.5kernel-rtbefore 5.14.21-150500.13.121.15.14.21-150500.13.121.1
SUSE:Linux Enterprise Micro 5.5kernel-sourcebefore 5.14.21-150500.55.136.15.14.21-150500.55.136.1
SUSE:Linux Enterprise Micro 5.5kernel-source-rtbefore 5.14.21-150500.13.121.15.14.21-150500.13.121.1
SUSE:Linux Enterprise Server 15 SP5-LTSSkernel-zfcpdumpbefore 5.14.21-150500.55.136.15.14.21-150500.55.136.1

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-2024-26830Apr 17, 2024 · i40e: Do not allow untrusted VF to remove administratively set MAC
    25Monitor
  • ← EarlierCVE-2024-26831Apr 17, 2024 · net/handshake: Fix handshake_req_destroy_test1
    22Monitor
  • Later →CVE-2024-26833Apr 17, 2024 · drm/amd/display: Fix memory leak in dm_sw_fini()
    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 Linux14f1992430ef9e647b02aa8ca12c5bcb9a1dffeaVendor (CNA)
Linux Linux6.1.80Vendor (CNA)
Linux Linux6.4Vendor (CNA)
Linux Linux6156277d1b26cb3fdb6fcbf0686ab78268571644Vendor (CNA)
Linux Linuxe2891c763aa2cff74dd6b5e978411ccf0cf94abeVendor (CNA)
Linux Linuxe3b63e966cac0bf78aaa1efede1827a252815a1dVendor (CNA)
debian:linux6.1.82-1 · Debian:12Package registry (OSV)
suse:kernel-64kb5.14.21-150500.55.136.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-default5.14.21-150500.55.136.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-default-base5.14.21-150500.55.136.1.150500.6.67.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-docs5.14.21-150500.55.136.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP5_Update_351-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5Package registry (OSV)
suse:kernel-obs-build5.14.21-150500.55.136.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-rt5.3.18-150300.235.1 · SUSE:Linux Enterprise Micro 5.2Package registry (OSV)
suse:kernel-source5.14.21-150500.55.136.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-source-rt5.3.18-150300.235.1 · SUSE:Linux Enterprise Micro 5.2Package registry (OSV)
suse:kernel-syms5.14.21-150500.55.136.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-zfcpdump5.14.21-150500.55.136.1 · SUSE:Linux Enterprise Server 15 SP5-LTSSPackage 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.

  • CVE-2025-37908398 days apartmm, slab: clean up slab->obj_exts always
    31Monitor
  • CVE-2022-3238520 days apartA double-free flaw was found in the Linux kernel’s NTFS3 subsystem in how a user triggers remount and umount simultaneously.
    31Monitor
  • CVE-2021-4711033 days apartx86/kvm: Disable kvmclock on all CPUs on shutdown
    28Monitor
  • CVE-2024-47693187 days apartIB/core: Fix ib_cache_setup_one error flow cleanup
    26Monitor
  • CVE-2024-268250 days apartnfc: nci: free rx_data_reassembly skb on NCI device cleanup
    22Monitor
  • CVE-2024-268410 days apartLoongArch: Update cpu_sibling_map when disabling nonboot CPUs
    22Monitor

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)

CWE-459 · Incomplete Cleanup

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. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (3 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records