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NVD / CVE Program· CNA Linux

CVE-2024-40914: mm/huge_memory: don't unpoison huge_zero_folio

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: 0.27% (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 0d73477af964dbd7396163a13817baf13940bca9, 5.15.162, 5.18.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0d73477af964dbd7396163a13817baf13940bca9, 5.15.162, 5.18 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/huge_memory: don't unpoison huge_zero_folio When I did memory failure tests recently, below panic occurs: kernel BUG at include/linux/mm.h:1135! invalid opcode: 0000 [#1] PREEMPT SMP NOPTI CPU: 9 PID: 137 Comm: kswapd1 Not tainted 6.9.0-rc4-00491-gd5ce28f156fe-dirty #14 RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 Call Trace: <TASK> do_shrink_slab+0x14f/0x6a0 shrink_slab+0xca/0x8c0 shrink_node+0x2d0/0x7d0 balance_pgdat+0x33a/0x720 kswapd+0x1f3/0x410 kthread+0xd5/0x100 ret_from_fork+0x2f/0x50 ret_from_fork_asm+0x1a/0x30 </TASK> Modules linked in: mce_inject hwpoison_inject ---[ end trace 0000000000000000 ]--- RIP: 0010:shrink_huge_zero_page_scan+0x168/0x1a0 RSP: 0018:ffff9933c6c57bd0 EFLAGS: 00000246 RAX: 000000000000003e RBX: 0000000000000000 RCX: ffff88f61fc5c9c8 RDX: 0000000000000000 RSI: 0000000000000027 RDI: ffff88f61fc5c9c0 RBP: ffffcd7c446b0000 R08: ffffffff9a9405f0 R09: 0000000000005492 R10: 00000000000030ea R11: ffffffff9a9405f0 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: ffff88e703c4ac00 FS: 0000000000000000(0000) GS:ffff88f61fc40000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4da6e9878 CR3: 0000000c71048000 CR4: 00000000000006f0 The root cause is that HWPoison flag will be set for huge_zero_folio without increasing the folio refcnt. But then unpoison_memory() will decrease the folio refcnt unexpectedly as it appears like a successfully hwpoisoned folio leading to VM_BUG_ON_PAGE(page_ref_count(page) == 0) when releasing huge_zero_folio. Skip unpoisoning huge_zero_folio in unpoison_memory() to fix this issue. We're not prepared to unpoison huge_zero_folio yet.

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Jul 12, 2024
Updated
Jun 17, 2026
EPSS
0.2% · 20th 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 · 0.2%

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

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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 kernel5.15.41 and later · before 5.15.162
  • linux linux kernel5.17.9 and later · before 5.18
  • linux linux kernel5.18.1 and later · before 6.1.95
  • linux linux kernel6.2 and later · before 6.6.35
  • linux linux kernel6.7 and later · before 6.9.6
  • linux linux kernel5.18

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

    • 13d9b8cd12f37d133b07ea5b323583e8a0c6b738, 5.18affected
    • f8f836100fff594cea8a0a027affb9d5520f09a7 and later · before 688bb46ad339497b5b7f527b6636d2afe04b46afaffected · git
    • 478d134e9506c7e9bfe2830ed03dd85e97966313 and later · before b2494506f30675245a3e6787281f79601af087bfaffected · git
    • 478d134e9506c7e9bfe2830ed03dd85e97966313 and later · before 0d73477af964dbd7396163a13817baf13940bca9affected · git
    • 478d134e9506c7e9bfe2830ed03dd85e97966313 and later · before d72b7711919de49d92a67dfc844a6cf4c23dd794affected · git
    • 478d134e9506c7e9bfe2830ed03dd85e97966313 and later · before fe6f86f4b40855a130a19aa589f9ba7f650423f4affected · git
    • 5.15.41 and later · before 5.15.162affected · semver
    • 5.17.9 and later · before 5.18affected · semver
    • before 5.18not affected · semver
    • 5.15.162 and later · up to and including 5.15.*not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.99-16.1.99-1
Debian:13linuxbefore 6.9.7-16.9.7-1
Red Hat:rhel_eus:9.2::appstreambpftool-debuginfobefore 0:7.0.0-284.82.1.el9_20:7.0.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-debuginfobefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-develbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debug-devel-matchedbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-debuginfobefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-develbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-64k-devel-matchedbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debug-debuginfobefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debug-develbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debug-devel-matchedbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debuginfobefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debuginfo-common-aarch64before 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debuginfo-common-ppc64lebefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debuginfo-common-s390xbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-debuginfo-common-x86_64before 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-develbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-devel-matchedbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-tools-debuginfobefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-zfcpdump-debuginfobefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-zfcpdump-develbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamkernel-zfcpdump-devel-matchedbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2
Red Hat:rhel_eus:9.2::appstreamperfbefore 0:5.14.0-284.82.1.el9_20:5.14.0-284.82.1.el9_2

+53

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-2024-40911Jul 12, 2024 · wifi: cfg80211: Lock wiphy in cfg80211_get_station
    22Monitor
  • ← EarlierCVE-2024-40913Jul 12, 2024 · cachefiles: defer exposing anon_fd until after copy_to_user() succeeds
    31Monitor
  • Later →CVE-2024-40915Jul 12, 2024 · riscv: rewrite __kernel_map_pages() to fix sleeping in invalid context
    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 Linux0d73477af964dbd7396163a13817baf13940bca9Vendor (CNA)
Linux Linux5.15.162Vendor (CNA)
Linux Linux5.18Vendor (CNA)
Linux Linux688bb46ad339497b5b7f527b6636d2afe04b46afVendor (CNA)
Linux Linuxb2494506f30675245a3e6787281f79601af087bfVendor (CNA)
Linux Linuxd72b7711919de49d92a67dfc844a6cf4c23dd794Vendor (CNA)
Linux Linuxfe6f86f4b40855a130a19aa589f9ba7f650423f4Vendor (CNA)
debian:linux6.1.99-1 · Debian:12Package registry (OSV)
red hat:bpftool-debuginfo0:7.0.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-debuginfo0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debug-devel-matched0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-debuginfo0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-64k-devel-matched0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-debuginfo0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-devel0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debug-devel-matched0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debuginfo0:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage registry (OSV)
red hat:kernel-debuginfo-common-aarch640:5.14.0-284.82.1.el9_2 · Red Hat:rhel_eus:9.2::appstreamPackage 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.

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

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. Fix✗ → ✓

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

References

Show all references (5 more)

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

All records