CVE-2024-27012· NVD / CVE Program· CNA Linux

netfilter: nf_tables: restore set elements when delete set fails

In the Linux kernel, the following vulnerability has been resolved: netfilter: nf_tables: restore set elements when delete set fails From abort path, nft_mapelem_activate() needs to restore refcounters to the original state. Currently, it uses the set->ops->walk() to iterate over these set elements. The existing set iterator skips inactive elements in the next generation, this does not work from the abort path to restore the original state since it has to skip active elements instead (not inactive ones). This patch moves the check for inactive elements to the set iterator callback, then it reverses the logic for the .activate case which needs to skip active elements. Toggle next generation bit for elements when delete set command is invoked and call nft_clear() from .activate (abort) path to restore the next generation bit. The splat below shows an object in mappings memleak: [43929.457523] ------------[ cut here ]------------ [43929.457532] WARNING: CPU: 0 PID: 1139 at include/net/netfilter/nf_tables.h:1237 nft_setelem_data_deactivate+0xe4/0xf0 [nf_tables] [...] [43929.458014] RIP: 0010:nft_setelem_data_deactivate+0xe4/0xf0 [nf_tables] [43929.458076] Code: 83 f8 01 77 ab 49 8d 7c 24 08 e8 37 5e d0 de 49 8b 6c 24 08 48 8d 7d 50 e8 e9 5c d0 de 8b 45 50 8d 50 ff 89 55 50 85 c0 75 86 <0f> 0b eb 82 0f 0b eb b3 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 [43929.458081] RSP: 0018:ffff888140f9f4b0 EFLAGS: 00010246 [43929.458086] RAX: 0000000000000000 RBX: ffff8881434f5288 RCX: dffffc0000000000 [43929.458090] RDX: 00000000ffffffff RSI: ffffffffa26d28a7 RDI: ffff88810ecc9550 [43929.458093] RBP: ffff88810ecc9500 R08: 0000000000000001 R09: ffffed10281f3e8f [43929.458096] R10: 0000000000000003 R11: ffff0000ffff0000 R12: ffff8881434f52a0 [43929.458100] R13: ffff888140f9f5f4 R14: ffff888151c7a800 R15: 0000000000000002 [43929.458103] FS: 00007f0c687c4740(0000) GS:ffff888390800000(0000) knlGS:0000000000000000 [43929.458107] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [43929.458111] CR2: 00007f58dbe5b008 CR3: 0000000123602005 CR4: 00000000001706f0 [43929.458114] Call Trace: [43929.458118] <TASK> [43929.458121] ? __warn+0x9f/0x1a0 [43929.458127] ? nft_setelem_data_deactivate+0xe4/0xf0 [nf_tables] [43929.458188] ? report_bug+0x1b1/0x1e0 [43929.458196] ? handle_bug+0x3c/0x70 [43929.458200] ? exc_invalid_op+0x17/0x40 [43929.458211] ? nft_setelem_data_deactivate+0xd7/0xf0 [nf_tables] [43929.458271] ? nft_setelem_data_deactivate+0xe4/0xf0 [nf_tables] [43929.458332] nft_mapelem_deactivate+0x24/0x30 [nf_tables] [43929.458392] nft_rhash_walk+0xdd/0x180 [nf_tables] [43929.458453] ? __pfx_nft_rhash_walk+0x10/0x10 [nf_tables] [43929.458512] ? rb_insert_color+0x2e/0x280 [43929.458520] nft_map_deactivate+0xdc/0x1e0 [nf_tables] [43929.458582] ? __pfx_nft_map_deactivate+0x10/0x10 [nf_tables] [43929.458642] ? __pfx_nft_mapelem_deactivate+0x10/0x10 [nf_tables] [43929.458701] ? __rcu_read_unlock+0x46/0x70 [43929.458709] nft_delset+0xff/0x110 [nf_tables] [43929.458769] nft_flush_table+0x16f/0x460 [nf_tables] [43929.458830] nf_tables_deltable+0x501/0x580 [nf_tables]

MediumCVSS 5.5 · v3.1—No exploit Fix available

Denial of service

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Published: May 1, 2024
Updated: Aug 5, 2026
EPSS: 0.3% · 18th percentile
CWE: CWE-401

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Action score

Monitor

Low priority for now.

CVSS: 22 / 40 · 5.5 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.3%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 5.5
CNA · Linux: 7.8; 2.3 point gap

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

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

Affected systems

Vendor	Product	CPE
linux	linux kernel	cpe:2.3:o:linux:linux_kernel
fedoraproject	fedora	cpe:2.3:o:fedoraproject:fedora

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

fedoraproject fedora38
fedoraproject fedora39
fedoraproject fedora40
linux linux kernel6.4 and later · before 6.8.8
linux linux kernel6.9

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
- bc9f791d2593f17e39f87c6e2b3a36549a3705b1, 3c7ec098e3b588434a8b07ea9b5b36f04cef1f50, a136b7942ad2a50de708f76ea299ccb45ac7a7f9, dc7cdf8cbcbf8b13de1df93f356ec04cdeef5c41, 6.4affected
- 25aa2ad37c2162be1c0bc4fe6397f7e4c13f00f8 and later · before 2cf64b16ac55c42c8989d8c819e42a77549cd680affected · git
- d60be2da67d172aecf866302c91ea11533eca4d9 and later · before faa0deee272128b95a838fe7c6ebf6a2a426df14affected · git
- 628bd3e49cba1c066228e23d71a852c23e26da73 and later · before 86658fc7414d4b9e25c2699d751034537503d637affected · git
- 628bd3e49cba1c066228e23d71a852c23e26da73 and later · before e79b47a8615d42c68aaeb68971593333667382edaffected · git
- 5.15.121 and later · before 5.15.212affected · semver
- 6.1.36 and later · before 6.1.176affected · semver
- 4.19.316 and later · before 4.20affected · semver
- 5.4.262 and later · before 5.5affected · semver
- 5.10.188 and later · before 5.11affected · semver

Package-level exposure

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

Ecosystem	Package	Affected range	Fix
Debian:12	linux	before 6.1.176-1	6.1.176-1
Debian:13	linux	before 6.8.9-1	6.8.9-1
Red Hat:rhel_eus:9.4::appstream	bpftool-debuginfo	before 0:7.3.0-427.55.1.el9_4	0:7.3.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-64k-debug-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-64k-debug-devel	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-64k-debug-devel-matched	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-64k-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-64k-devel	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-64k-devel-matched	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debug-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debug-devel	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debug-devel-matched	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debuginfo-common-aarch64	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debuginfo-common-ppc64le	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debuginfo-common-s390x	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-debuginfo-common-x86_64	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-devel	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-devel-matched	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-doc	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-rt-debug-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-rt-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-tools-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4
Red Hat:rhel_eus:9.4::appstream	kernel-zfcpdump-debuginfo	before 0:5.14.0-427.55.1.el9_4	0:5.14.0-427.55.1.el9_4

+56

Same product

linux: all records

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Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / package	Fixed version	Source
Linux Linux	2cf64b16ac55c42c8989d8c819e42a77549cd680	Vendor (CNA)
Linux Linux	4.20	Vendor (CNA)
Linux Linux	5.11	Vendor (CNA)
Linux Linux	5.15.212	Vendor (CNA)
Linux Linux	5.5	Vendor (CNA)
Linux Linux	6.1.176	Vendor (CNA)
Linux Linux	6.4	Vendor (CNA)
Linux Linux	86658fc7414d4b9e25c2699d751034537503d637	Vendor (CNA)
Linux Linux	e79b47a8615d42c68aaeb68971593333667382ed	Vendor (CNA)
Linux Linux	faa0deee272128b95a838fe7c6ebf6a2a426df14	Vendor (CNA)
debian:linux	6.1.176-1 · Debian:12	Package registry (OSV)
red hat:bpftool-debuginfo	0:7.3.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-64k-debug-debuginfo	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-64k-debug-devel	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-64k-debug-devel-matched	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-64k-debuginfo	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-64k-devel	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-64k-devel-matched	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-debug-debuginfo	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-debug-devel	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-debug-devel-matched	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-debuginfo	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package registry (OSV)
red hat:kernel-debuginfo-common-aarch64	0:5.14.0-427.55.1.el9_4 · Red Hat:rhel_eus:9.4::appstream	Package 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).

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-401 · Missing Release of Memory after Effective Lifetime

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

Fix✗ → ✓Sep 28, 2026, 10:11 PM UTC

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

References

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

All records

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Data sources and verification

CNA: Linux

CVE.org (CNA)Aug 5, 2026, 11:28 AM UTC
CISA ADPAug 5, 2026, 11:28 AM UTC
NVDAug 5, 2026, 11:28 AM UTC
FIRST EPSSSep 29, 2026, 12:00 AM UTC
OSV / GHSASep 30, 2026, 3:23 AM UTC

Each line is when that source was last processed for this record.

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