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NVD / CVE Program· CNA Linux

CVE-2024-36971: net: fix __dst_negative_advice() race

Noroxi assessment

Priority: This week (action score 62/100)

  • CISA has confirmed exploitation in the wild (Aug 7, 2024). Remediation deadline for US federal agencies: Aug 28, 2024.
  • Probability of exploitation in the next 30 days: 2.7% (FIRST EPSS); higher than 85.9% of all records.
  • 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 051c0bde9f0450a2ec3d62a86d2a0d2fad117f13, 2295a7ef5c8c49241bff769e7826ef2582e532a6, 5af198c387128a9d2ddd620b0f0803564a4d4508.
  • Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).

Don’t wait for the next maintenance window. Upgrade to Linux Linux 051c0bde9f0450a2ec3d62a86d2a0d2fad117f13, 2295a7ef5c8c49241bff769e7826ef2582e532a6, 5af198c387128a9d2ddd620b0f0803564a4d4508 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 · CISA KEV · FIRST EPSS

In the Linux kernel, the following vulnerability has been resolved: net: fix __dst_negative_advice() race __dst_negative_advice() does not enforce proper RCU rules when sk->dst_cache must be cleared, leading to possible UAF. RCU rules are that we must first clear sk->sk_dst_cache, then call dst_release(old_dst). Note that sk_dst_reset(sk) is implementing this protocol correctly, while __dst_negative_advice() uses the wrong order. Given that ip6_negative_advice() has special logic against RTF_CACHE, this means each of the three ->negative_advice() existing methods must perform the sk_dst_reset() themselves. Note the check against NULL dst is centralized in __dst_negative_advice(), there is no need to duplicate it in various callbacks. Many thanks to Clement Lecigne for tracking this issue. This old bug became visible after the blamed commit, using UDP sockets.

HighCVSS 7.8 · v3.1KEVWeaponized Fix available
Published
Jun 10, 2024
Updated
Aug 5, 2026
EPSS
2.7% · 85th percentile

Report tools

JSON

Action score

62

This week

Don’t wait for the next maintenance window.

CVSS
31 / 40 · 7.8 / 10
CISA KEV
30 / 30 · Listed
EPSS
1 / 30 · 2.7%

CISA SSVC decision

Exploitation
active
Automatable
no
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
7.8
CNA · Linux
7.8
agree

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

Actively exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on Aug 7, 2024. That signals real attacks, not theory.

Remediation deadline for US federal agencies: Aug 28, 2024.

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  • In CISA KEV: exploitation in the wild confirmed
  • Weaponized exploit exists
  • 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
debiandebian linux

Affected versions

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

  • debian debian linux10.0
  • linux linux kernel4.6 and later · before 4.19.316
  • linux linux kernel4.20 and later · before 5.4.278
  • linux linux kernel5.5 and later · before 5.10.219
  • linux linux kernel5.11 and later · before 5.15.161
  • linux linux kernel5.16 and later · before 6.1.94
  • linux linux kernel6.2 and later · before 6.6.34
  • linux linux kernel6.7 and later · before 6.9.4

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

    • 4.6affected
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before 051c0bde9f0450a2ec3d62a86d2a0d2fad117f13affected · git
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before db0082825037794c5dba9959c9de13ca34cc5e72affected · git
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before 2295a7ef5c8c49241bff769e7826ef2582e532a6affected · git
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before eacb8b195579c174a6d3e12a9690b206eb7f28cfaffected · git
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before 81dd3c82a456b0015461754be7cb2693991421b4affected · git
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before 5af198c387128a9d2ddd620b0f0803564a4d4508affected · git
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before b8af8e6118a6605f0e495a58d591ca94a85a50fcaffected · git
    • a87cb3e48ee86d29868d3f59cfb9ce1a8fa63314 and later · before 92f1655aa2b2294d0b49925f3b875a634bd3b59eaffected · git
    • before 4.6not affected · semver

Package-level exposure

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

EcosystemPackageAffected rangeFix
Debian:11linuxbefore 5.10.221-15.10.221-1
Debian:12linuxbefore 6.1.94-16.1.94-1
Debian:13linuxbefore 6.9.7-16.9.7-1
Red Hat:enterprise_linux:8::baseoskpatch-patch-4_18_0-553before 0:1-1.el8_100:1-1.el8_10
Red Hat:enterprise_linux:8::baseoskpatch-patch-4_18_0-553-debuginfobefore 0:1-1.el8_100:1-1.el8_10
Red Hat:enterprise_linux:8::baseoskpatch-patch-4_18_0-553-debugsourcebefore 0:1-1.el8_100:1-1.el8_10
Red Hat:enterprise_linux:9::baseoskpatch-patch-5_14_0-427_13_1before 0:1-2.el9_40:1-2.el9_4
Red Hat:enterprise_linux:9::baseoskpatch-patch-5_14_0-427_13_1-debuginfobefore 0:1-2.el9_40:1-2.el9_4
Red Hat:enterprise_linux:9::baseoskpatch-patch-5_14_0-427_13_1-debugsourcebefore 0:1-2.el9_40:1-2.el9_4
Red Hat:rhel_aus:7.7::serverbpftoolbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverbpftool-debuginfobefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernelbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-abi-whitelistsbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-debugbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-debug-debuginfobefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-debug-develbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-debuginfobefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-debuginfo-common-x86_64before 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-develbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-docbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-toolsbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-tools-debuginfobefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-tools-libsbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7
Red Hat:rhel_aus:7.7::serverkernel-tools-libs-develbefore 0:3.10.0-1062.90.1.el70:3.10.0-1062.90.1.el7

+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-2024-36970Jun 8, 2024 · wifi: iwlwifi: Use request_module_nowait
    22Monitor
  • ← EarlierCVE-2024-36968Jun 8, 2024 · Bluetooth: L2CAP: Fix div-by-zero in l2cap_le_flowctl_init()
    26Monitor
  • Later →CVE-2024-36972Jun 10, 2024 · af_unix: Update unix_sk(sk)->oob_skb under sk_receive_queue lock.
    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 / packageFixed versionSource
Linux Linux051c0bde9f0450a2ec3d62a86d2a0d2fad117f13Vendor (CNA)
Linux Linux2295a7ef5c8c49241bff769e7826ef2582e532a6Vendor (CNA)
Linux Linux5af198c387128a9d2ddd620b0f0803564a4d4508Vendor (CNA)
Linux Linux81dd3c82a456b0015461754be7cb2693991421b4Vendor (CNA)
Linux Linux92f1655aa2b2294d0b49925f3b875a634bd3b59eVendor (CNA)
Linux Linuxb8af8e6118a6605f0e495a58d591ca94a85a50fcVendor (CNA)
Linux Linuxdb0082825037794c5dba9959c9de13ca34cc5e72Vendor (CNA)
Linux Linuxeacb8b195579c174a6d3e12a9690b206eb7f28cfVendor (CNA)
debian:linux6.1.94-1 · Debian:12Package registry (OSV)
red hat:bpftool0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:bpftool-debuginfo0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-abi-stablelists0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-core0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-core0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-debuginfo0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-devel0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-modules0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debug-modules-extra0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
red hat:kernel-debuginfo0:4.18.0-477.67.1.el8_8 · Red Hat:rhel_eus:8.8::baseosPackage registry (OSV)
suse:kernel-64kb5.3.18-150300.59.179.1 · SUSE:Linux Enterprise High Performance Computing 15 SP3-LTSSPackage registry (OSV)
suse:kernel-default5.3.18-150200.24.206.1 · SUSE:Linux Enterprise Live Patching 15 SP2Package registry (OSV)
suse:kernel-default-base5.3.18-150200.24.206.1.150200.9.107.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSPackage registry (OSV)
suse:kernel-docs5.3.18-150200.24.206.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSPackage registry (OSV)
suse:kernel-livepatch-SLE15-SP2_Update_531-150200.5.3.1 · SUSE:Linux Enterprise Live Patching 15 SP2Package registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_4410-150300.7.6.1 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-livepatch-SLE15-SP3_Update_491-150300.7.3.2 · SUSE:Linux Enterprise Live Patching 15 SP3Package registry (OSV)
suse:kernel-obs-build5.3.18-150200.24.206.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSPackage registry (OSV)
suse:kernel-preempt5.3.18-150200.24.206.1 · SUSE:Linux Enterprise High Performance Computing 15 SP2-LTSSPackage registry (OSV)

+3

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Proof-of-concept repository on GitHub ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Proof-of-concept repository on GitHubstars:22025-10-14

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.

  1. Published
  2. CISA KEV+58 d
  3. First PoC+491 d
  4. TodayNov 1, 2026+874 d

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.

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
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
Low
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:L/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

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

Fixed

c
lock(&dev->lock);free(dev->buf);dev->buf = NULL;unlock(&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

  1. Fix✗ → ✓

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

References

Show all references (9 more)

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

All records