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NVD / CVE Program· CNA Linux

CVE-2024-49952: netfilter: nf_tables: prevent nf_skb_duplicated corruption

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: 0.28% (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 38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663, 4e3542f40f3a94efa59ea328e307c50601ed7065, 50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7; cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.0 5.15.173.1-1; cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.0 5.15.173.1-1.
  • Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 5.5.

Low priority for now. Upgrade to Linux Linux 38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663, 4e3542f40f3a94efa59ea328e307c50601ed7065, 50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7; cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.0 5.15.173.1-1; cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.0 5.15.173.1-1 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: netfilter: nf_tables: prevent nf_skb_duplicated corruption syzbot found that nf_dup_ipv4() or nf_dup_ipv6() could write per-cpu variable nf_skb_duplicated in an unsafe way [1]. Disabling preemption as hinted by the splat is not enough, we have to disable soft interrupts as well. [1] BUG: using __this_cpu_write() in preemptible [00000000] code: syz.4.282/6316 caller is nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87 CPU: 0 UID: 0 PID: 6316 Comm: syz.4.282 Not tainted 6.11.0-rc7-syzkaller-00104-g7052622fccb1 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:93 [inline] dump_stack_lvl+0x241/0x360 lib/dump_stack.c:119 check_preemption_disabled+0x10e/0x120 lib/smp_processor_id.c:49 nf_dup_ipv4+0x651/0x8f0 net/ipv4/netfilter/nf_dup_ipv4.c:87 nft_dup_ipv4_eval+0x1db/0x300 net/ipv4/netfilter/nft_dup_ipv4.c:30 expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline] nft_do_chain+0x4ad/0x1da0 net/netfilter/nf_tables_core.c:288 nft_do_chain_ipv4+0x202/0x320 net/netfilter/nft_chain_filter.c:23 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook+0x2c4/0x450 include/linux/netfilter.h:269 NF_HOOK_COND include/linux/netfilter.h:302 [inline] ip_output+0x185/0x230 net/ipv4/ip_output.c:433 ip_local_out net/ipv4/ip_output.c:129 [inline] ip_send_skb+0x74/0x100 net/ipv4/ip_output.c:1495 udp_send_skb+0xacf/0x1650 net/ipv4/udp.c:981 udp_sendmsg+0x1c21/0x2a60 net/ipv4/udp.c:1269 sock_sendmsg_nosec net/socket.c:730 [inline] __sock_sendmsg+0x1a6/0x270 net/socket.c:745 ____sys_sendmsg+0x525/0x7d0 net/socket.c:2597 ___sys_sendmsg net/socket.c:2651 [inline] __sys_sendmmsg+0x3b2/0x740 net/socket.c:2737 __do_sys_sendmmsg net/socket.c:2766 [inline] __se_sys_sendmmsg net/socket.c:2763 [inline] __x64_sys_sendmmsg+0xa0/0xb0 net/socket.c:2763 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f4ce4f7def9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f4ce5d4a038 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 00007f4ce5135f80 RCX: 00007f4ce4f7def9 RDX: 0000000000000001 RSI: 0000000020005d40 RDI: 0000000000000006 RBP: 00007f4ce4ff0b76 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4ce5135f80 R15: 00007ffd4cbc6d68 </TASK>

MediumCVSS 5.5 · v3.1—No exploit Fix available
Published
Oct 21, 2024
Updated
Oct 15, 2026
EPSS
0.2% · 21th 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.

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.

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-2024-49952

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 kernel4.3 and later · before 4.19.323
  • linux linux kernel4.20 and later · before 5.4.285
  • linux linux kernel5.5 and later · before 5.10.227
  • linux linux kernel5.11 and later · before 5.15.168
  • linux linux kernel5.16 and later · before 6.1.113
  • linux linux kernel6.2 and later · before 6.6.55
  • linux linux kernel6.7 and later · before 6.10.14
  • linux linux kernel6.11 and later · before 6.11.3
  • linux linux kernel6.12

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

    • 4.3affected
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before 50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7affected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before c0add6ed2cf1c4733cd489efc61faeccd3433b41affected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before 531754952f5dfc4b141523088147071d6e6112c4affected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before 38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663affected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before b40b027a0c0cc1cb9471a13f9730bb2fff12a15baffected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before 4e3542f40f3a94efa59ea328e307c50601ed7065affected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before f839c5cd348201fec440d987cbca9b979bdb4fa7affected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before 752e1924604254f1708f3e3700283a86ebdd325daffected · git
    • d877f07112f1e5a247c6b585c971a93895c9f738 and later · before 92ceba94de6fb4cee2bf40b485979c342f44a492affected · git

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:12linuxbefore 6.1.115-16.1.115-1
Debian:13linuxbefore 6.11.4-16.11.4-1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-64kbbefore 5.14.21-150500.55.91.15.14.21-150500.55.91.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-docsbefore 5.14.21-150500.55.91.15.14.21-150500.55.91.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-obs-buildbefore 5.14.21-150500.55.91.15.14.21-150500.55.91.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-sourcebefore 5.14.21-150500.55.91.15.14.21-150500.55.91.1
SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSkernel-symsbefore 5.14.21-150500.55.91.15.14.21-150500.55.91.1
SUSE:Linux Enterprise Live Patching 15 SP5kernel-livepatch-SLE15-SP5_Update_22before 1-150500.11.3.11-150500.11.3.1
SUSE:Linux Enterprise Micro 5.5kernel-defaultbefore 5.14.21-150500.55.91.15.14.21-150500.55.91.1
SUSE:Linux Enterprise Micro 5.5kernel-default-basebefore 5.14.21-150500.55.91.1.150500.6.41.15.14.21-150500.55.91.1.150500.6.41.1
SUSE:Linux Enterprise Server 15 SP5-LTSSkernel-zfcpdumpbefore 5.14.21-150500.55.91.15.14.21-150500.55.91.1

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-2024-49948Oct 21, 2024 · net: add more sanity checks to qdisc_pkt_len_init()
    22Monitor
  • ← EarlierCVE-2024-49949Oct 21, 2024 · net: avoid potential underflow in qdisc_pkt_len_init() with UFO
    22Monitor
  • Later →CVE-2024-49955Oct 21, 2024 · ACPI: battery: Fix possible crash when unregistering a battery hook
    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 Linux38e3fd0c4a2616052eb3c8f4e6f32d1ff47cd663Vendor (CNA)
Linux Linux4e3542f40f3a94efa59ea328e307c50601ed7065Vendor (CNA)
Linux Linux50067d8b3f48e4cd4c9e817d3e9a5b5ff3507ca7Vendor (CNA)
Linux Linux531754952f5dfc4b141523088147071d6e6112c4Vendor (CNA)
Linux Linux752e1924604254f1708f3e3700283a86ebdd325dVendor (CNA)
Linux Linux92ceba94de6fb4cee2bf40b485979c342f44a492Vendor (CNA)
Linux Linuxb40b027a0c0cc1cb9471a13f9730bb2fff12a15bVendor (CNA)
Linux Linuxc0add6ed2cf1c4733cd489efc61faeccd3433b41Vendor (CNA)
Linux Linuxf839c5cd348201fec440d987cbca9b979bdb4fa7Vendor (CNA)
cbl2 kernel 5.15.167.1-2 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.167.1-2 on CBL-Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
cbl2 kernel 5.15.173.1-1 on CBL Mariner 2.05.15.173.1-1 · CBL-Mariner ReleasesMicrosoft (MSRC)
debian:linux6.1.115-1 · Debian:12Package registry (OSV)
suse:kernel-64kb5.14.21-150500.55.91.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-default5.14.21-150500.55.91.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-default-base5.14.21-150500.55.91.1.150500.6.41.1 · SUSE:Linux Enterprise Micro 5.5Package registry (OSV)
suse:kernel-docs5.14.21-150500.55.91.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP5_Update_221-150500.11.3.1 · SUSE:Linux Enterprise Live Patching 15 SP5Package registry (OSV)
suse:kernel-obs-build5.14.21-150500.55.91.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-source5.14.21-150500.55.91.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-syms5.14.21-150500.55.91.1 · SUSE:Linux Enterprise High Performance Computing 15 SP5-ESPOSPackage registry (OSV)
suse:kernel-zfcpdump5.14.21-150500.55.91.1 · 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.

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. Fix✗ → ✓

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

References

Show all references (13 more)

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

All records