NVD / CVE Program· CNA Linux

CVE-2024-46858: mptcp: pm: Fix uaf in __timer_delete_sync

Noroxi assessment

Priority: Monitor (action score 28/100)

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: 0.59% (FIRST EPSS).
Someone with local access to the system can trigger it. A low-privileged account is enough. No user action is required. Special conditions such as timing or configuration are required.
Fixed version: Linux Linux 0e7814b028cd50b3ff79659d23dfa9da6a1e75e1, 12134a652b0a10064844ea235173e70246eba6dc, 3554482f4691571fc4b5490c17ae26896e62171c; Azure Linux 3.0 ARM 6.6.56.1-5; Azure Linux 3.0 x64 6.6.56.1-5.
Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Low priority for now. Upgrade to Linux Linux 0e7814b028cd50b3ff79659d23dfa9da6a1e75e1, 12134a652b0a10064844ea235173e70246eba6dc, 3554482f4691571fc4b5490c17ae26896e62171c; Azure Linux 3.0 ARM 6.6.56.1-5; Azure Linux 3.0 x64 6.6.56.1-5 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: mptcp: pm: Fix uaf in __timer_delete_sync There are two paths to access mptcp_pm_del_add_timer, result in a race condition: CPU1 CPU2 ==== ==== net_rx_action napi_poll netlink_sendmsg __napi_poll netlink_unicast process_backlog netlink_unicast_kernel __netif_receive_skb genl_rcv __netif_receive_skb_one_core netlink_rcv_skb NF_HOOK genl_rcv_msg ip_local_deliver_finish genl_family_rcv_msg ip_protocol_deliver_rcu genl_family_rcv_msg_doit tcp_v4_rcv mptcp_pm_nl_flush_addrs_doit tcp_v4_do_rcv mptcp_nl_remove_addrs_list tcp_rcv_established mptcp_pm_remove_addrs_and_subflows tcp_data_queue remove_anno_list_by_saddr mptcp_incoming_options mptcp_pm_del_add_timer mptcp_pm_del_add_timer kfree(entry) In remove_anno_list_by_saddr(running on CPU2), after leaving the critical zone protected by "pm.lock", the entry will be released, which leads to the occurrence of uaf in the mptcp_pm_del_add_timer(running on CPU1). Keeping a reference to add_timer inside the lock, and calling sk_stop_timer_sync() with this reference, instead of "entry->add_timer". Move list_del(&entry->list) to mptcp_pm_del_add_timer and inside the pm lock, do not directly access any members of the entry outside the pm lock, which can avoid similar "entry->x" uaf.

HighCVSS 7.0 · v3.1—No exploit Fix available

Memory safety

Published: Sep 27, 2024
Updated: Aug 5, 2026
EPSS: 0.5% · 48th percentile
CWE: CWE-416

Report tools

JSON

Action score

Monitor

Low priority for now.

CVSS: 28 / 40 · 7.0 / 10
CISA KEV: 0 / 30 · Not listed
EPSS: 0 / 30 · 0.5%

CISA SSVC decision

Exploitation: none
Automatable: no
Technical impact: partial

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD: 7.0
CNA · Linux: 8.1; 1.1 point gap

CVSS:3.1/AV:N/AC:H/PR:N/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.

Running WordPress? Scan your site free with WP Lens

Is your version affected? Check it

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.

We use this product, ask for help

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.

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

Affected versions

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

linux linux kernel5.10 and later · before 6.1.111
linux linux kernel6.2 and later · before 6.6.52
linux linux kernel6.7 and later · before 6.10.11
linux linux kernel6.11

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
- 5.10affected
- 00cfd77b9063dcdf3628a7087faba60de85a9cc8 and later · before 0e7814b028cd50b3ff79659d23dfa9da6a1e75e1affected · git
- 00cfd77b9063dcdf3628a7087faba60de85a9cc8 and later · before 3554482f4691571fc4b5490c17ae26896e62171caffected · git
- 00cfd77b9063dcdf3628a7087faba60de85a9cc8 and later · before 67409b358500c71632116356a0b065f112d7b707affected · git
- 00cfd77b9063dcdf3628a7087faba60de85a9cc8 and later · before 6452b162549c7f9ef54655d3fb9977b9192e6e5baffected · git
- 00cfd77b9063dcdf3628a7087faba60de85a9cc8 and later · before 12134a652b0a10064844ea235173e70246eba6dcaffected · git
- 00cfd77b9063dcdf3628a7087faba60de85a9cc8 and later · before b4cd80b0338945a94972ac3ed54f8338d2da2076affected · git
- before 5.10not affected · semver
- 5.10.227 and later · up to and including 5.10.*not affected · semver
- 5.15.168 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.

Ecosystem	Package	Affected range	Fix
AlmaLinux:8	bpftool	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-abi-stablelists	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-core	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-cross-headers	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-debug	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-debug-core	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-debug-devel	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-debug-modules	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-debug-modules-extra	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-devel	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-doc	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-headers	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-modules	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-modules-extra	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-tools	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-tools-libs	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-tools-libs-devel	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-zfcpdump	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-zfcpdump-core	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-zfcpdump-devel	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-zfcpdump-modules	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	kernel-zfcpdump-modules-extra	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.el8_10
AlmaLinux:8	perf	before 4.18.0-553.30.1.el8_10	4.18.0-553.30.1.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-2024-46856Sep 27, 2024 · net: phy: dp83822: Fix NULL pointer dereference on DP83825 devices
22Monitor
← EarlierCVE-2024-46857Sep 27, 2024 · net/mlx5: Fix bridge mode operations when there are no VFs
22Monitor
Later →CVE-2024-46859Sep 27, 2024 · platform/x86: panasonic-laptop: Fix SINF array out of bounds accesses
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 / package	Fixed version	Source
Linux Linux	0e7814b028cd50b3ff79659d23dfa9da6a1e75e1	Vendor (CNA)
Linux Linux	12134a652b0a10064844ea235173e70246eba6dc	Vendor (CNA)
Linux Linux	3554482f4691571fc4b5490c17ae26896e62171c	Vendor (CNA)
Linux Linux	6452b162549c7f9ef54655d3fb9977b9192e6e5b	Vendor (CNA)
Linux Linux	67409b358500c71632116356a0b065f112d7b707	Vendor (CNA)
Linux Linux	b4cd80b0338945a94972ac3ed54f8338d2da2076	Vendor (CNA)
Azure Linux 3.0 ARM	6.6.56.1-5 · kernel	Microsoft (MSRC)
Azure Linux 3.0 x64	6.6.56.1-5 · kernel	Microsoft (MSRC)
almalinux:bpftool	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-abi-stablelists	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-core	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-cross-headers	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-debug	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-debug-core	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-debug-devel	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-debug-modules	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-debug-modules-extra	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-devel	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
almalinux:kernel-doc	4.18.0-553.30.1.el8_10 · AlmaLinux:8	Package registry (OSV)
debian:linux	6.1.112-1 · Debian:12	Package registry (OSV)
opensuse:dtb-aarch64	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-64kb	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-debug	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-default	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-default-base	6.4.0-150600.23.38.1.150600.12.16.2 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-docs	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-kvmsmall	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-obs-build	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)
opensuse:kernel-obs-qa	6.4.0-150600.23.38.1 · openSUSE:Leap 15.6	Package registry (OSV)

+28

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).

National notice (Türkiye Cybersecurity Directorate / USOM)

Official security notices citing this record; remediation advice is on the agency's page.

TR-24-1564 · Sep 30, 2024(Linux Kernel Güvenlik Bildirimi)

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.
Special conditions such as timing or configuration are required.

If successful

Confidentiality: high · data can be read
Integrity: high · data or configuration can be modified
Availability: high · the service can be disrupted

Attack vector: Local
Attack complexity: High
Privileges required: Low
User interaction: None
Scope: Unchanged
Confidentiality impact: High
Integrity impact: High
Availability impact: High

Weakness class (CWE)

CWE-416 · Use After Free

CVSS vector

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

nvd-primary

Root cause

After a memory region is freed, another reference pointing to it is still used. By then, the same region may have been allocated for different data.

The bug in code

The whole CWE-416 class

A representative example of this vulnerability class. Not the vendor's source code; it shows the faulty pattern and its fix.

Vulnerable

1free(dev->buf);
2/* ... another thread is still running ... */
3process(dev->buf);

Fixed

1lock(&dev->lock);
2free(dev->buf);
3dev->buf = NULL;
4unlock(&dev->lock);

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

git.kernel.org/stable/c/0e7814b028cd50b3ff79659d23dfa9da6a1e75e1

Show all references (7 more)

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

All records