drop_monitor: replace spin_lock by raw_spin_lock
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: 0.75% (FIRST EPSS); higher than 54.2% 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 07ea878684dfb78a9d4f564c39d07e855a9e242e, 594e47957f3fe034645e6885393ce96c12286334, 76ce2f9125244e1708d29c1d3f9d1d50b347bda0.
- Severity is disputed: the assigning authority (CNA) scores it 7.5, NVD 5.5.
- Mentioned 1 time in Turkish national cyber security advisories (siberguvenlik.gov.tr).
Low priority for now. Upgrade to Linux Linux 07ea878684dfb78a9d4f564c39d07e855a9e242e, 594e47957f3fe034645e6885393ce96c12286334, 76ce2f9125244e1708d29c1d3f9d1d50b347bda0 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: drop_monitor: replace spin_lock by raw_spin_lock trace_drop_common() is called with preemption disabled, and it acquires a spin_lock. This is problematic for RT kernels because spin_locks are sleeping locks in this configuration, which causes the following splat: BUG: sleeping function called from invalid context at kernel/locking/spinlock_rt.c:48 in_atomic(): 1, irqs_disabled(): 1, non_block: 0, pid: 449, name: rcuc/47 preempt_count: 1, expected: 0 RCU nest depth: 2, expected: 2 5 locks held by rcuc/47/449: #0: ff1100086ec30a60 ((softirq_ctrl.lock)){+.+.}-{2:2}, at: __local_bh_disable_ip+0x105/0x210 #1: ffffffffb394a280 (rcu_read_lock){....}-{1:2}, at: rt_spin_lock+0xbf/0x130 #2: ffffffffb394a280 (rcu_read_lock){....}-{1:2}, at: __local_bh_disable_ip+0x11c/0x210 #3: ffffffffb394a160 (rcu_callback){....}-{0:0}, at: rcu_do_batch+0x360/0xc70 #4: ff1100086ee07520 (&data->lock){+.+.}-{2:2}, at: trace_drop_common.constprop.0+0xb5/0x290 irq event stamp: 139909 hardirqs last enabled at (139908): [<ffffffffb1df2b33>] _raw_spin_unlock_irqrestore+0x63/0x80 hardirqs last disabled at (139909): [<ffffffffb19bd03d>] trace_drop_common.constprop.0+0x26d/0x290 softirqs last enabled at (139892): [<ffffffffb07a1083>] __local_bh_enable_ip+0x103/0x170 softirqs last disabled at (139898): [<ffffffffb0909b33>] rcu_cpu_kthread+0x93/0x1f0 Preemption disabled at: [<ffffffffb1de786b>] rt_mutex_slowunlock+0xab/0x2e0 CPU: 47 PID: 449 Comm: rcuc/47 Not tainted 6.9.0-rc2-rt1+ #7 Hardware name: Dell Inc. PowerEdge R650/0Y2G81, BIOS 1.6.5 04/15/2022 Call Trace: <TASK> dump_stack_lvl+0x8c/0xd0 dump_stack+0x14/0x20 __might_resched+0x21e/0x2f0 rt_spin_lock+0x5e/0x130 ? trace_drop_common.constprop.0+0xb5/0x290 ? skb_queue_purge_reason.part.0+0x1bf/0x230 trace_drop_common.constprop.0+0xb5/0x290 ? preempt_count_sub+0x1c/0xd0 ? _raw_spin_unlock_irqrestore+0x4a/0x80 ? __pfx_trace_drop_common.constprop.0+0x10/0x10 ? rt_mutex_slowunlock+0x26a/0x2e0 ? skb_queue_purge_reason.part.0+0x1bf/0x230 ? __pfx_rt_mutex_slowunlock+0x10/0x10 ? skb_queue_purge_reason.part.0+0x1bf/0x230 trace_kfree_skb_hit+0x15/0x20 trace_kfree_skb+0xe9/0x150 kfree_skb_reason+0x7b/0x110 skb_queue_purge_reason.part.0+0x1bf/0x230 ? __pfx_skb_queue_purge_reason.part.0+0x10/0x10 ? mark_lock.part.0+0x8a/0x520 ... trace_drop_common() also disables interrupts, but this is a minor issue because we could easily replace it with a local_lock. Replace the spin_lock with raw_spin_lock to avoid sleeping in atomic context.
- Published
- Jul 12, 2024
- Updated
- Oct 15, 2026
- EPSS
- 0.7% · 54th percentile
- CWE
- CWE-667
Report tools
Action score
22
Monitor
Low priority for now.
- CVSS
- 22 / 40 · 5.5 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.7%
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
- 7.5
- 2.0 point gap
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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.
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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.
We use this product, ask for helpAffected 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 kernelbefore 5.4.279
- linux linux kernel5.5 and later · before 5.10.221
- linux linux kernel5.11 and later · before 5.15.162
- linux linux kernel5.16 and later · before 6.1.96
- linux linux kernel6.2 and later · before 6.6.36
- linux linux kernel6.7 and later · before 6.9.7
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
- 2.6.31affected
- 4ea7e38696c7e798c47ebbecadfd392f23f814f9 and later · before 594e47957f3fe034645e6885393ce96c12286334affected · git
- 4ea7e38696c7e798c47ebbecadfd392f23f814f9 and later · before 96941f29ebcc1e9cbf570dc903f30374909562f5affected · git
- 4ea7e38696c7e798c47ebbecadfd392f23f814f9 and later · before b3722fb69468693555f531cddda5c30444726dacaffected · git
- 4ea7e38696c7e798c47ebbecadfd392f23f814f9 and later · before f251ccef1d864790e5253386e95544420b7cd8f3affected · git
- 4ea7e38696c7e798c47ebbecadfd392f23f814f9 and later · before 76ce2f9125244e1708d29c1d3f9d1d50b347bda0affected · git
- 4ea7e38696c7e798c47ebbecadfd392f23f814f9 and later · before 07ea878684dfb78a9d4f564c39d07e855a9e242eaffected · git
- 4ea7e38696c7e798c47ebbecadfd392f23f814f9 and later · before f1e197a665c2148ebc25fe09c53689e60afea195affected · git
- before 2.6.31not affected · semver
- 5.4.279 and later · up to and including 5.4.*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 |
|---|---|---|---|
| Debian:12 | linux | before 6.1.99-1 | 6.1.99-1 |
| Debian:13 | linux | before 6.9.7-1 | 6.9.7-1 |
| openSUSE:Leap 15.6 | dtb-aarch64 | before 6.4.0-150600.23.42.1 | 6.4.0-150600.23.42.1 |
| openSUSE:Leap 15.6 | kernel-debug | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| openSUSE:Leap 15.6 | kernel-kvmsmall | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| openSUSE:Leap 15.6 | kernel-obs-qa | before 6.4.0-150600.23.42.1 | 6.4.0-150600.23.42.1 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_9 | before 1-150600.13.3.4 | 1-150600.13.3.4 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6_Update_9 | before 1-150600.13.3.4 | 1-150600.13.3.4 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_9 | before 1-150600.1.3.2 | 1-150600.1.3.2 |
| SUSE:Linux Enterprise Live Patching 15 SP6 | kernel-livepatch-SLE15-SP6-RT_Update_9 | before 1-150600.1.3.2 | 1-150600.1.3.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-64kb | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-64kb | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-default | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-default | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-default-base | before 6.4.0-150600.23.42.2.150600.12.18.4 | 6.4.0-150600.23.42.2.150600.12.18.4 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-default-base | before 6.4.0-150600.23.42.2.150600.12.18.4 | 6.4.0-150600.23.42.2.150600.12.18.4 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-source | before 6.4.0-150600.23.42.1 | 6.4.0-150600.23.42.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-source | before 6.4.0-150600.23.42.1 | 6.4.0-150600.23.42.1 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-zfcpdump | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| SUSE:Linux Enterprise Module for Basesystem 15 SP6 | kernel-zfcpdump | before 6.4.0-150600.23.42.2 | 6.4.0-150600.23.42.2 |
| SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | kernel-coco | before 6.4.0-15061.15.coco15sp6.1 | 6.4.0-15061.15.coco15sp6.1 |
| SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | kernel-coco_debug | before 6.4.0-15061.15.coco15sp6.1 | 6.4.0-15061.15.coco15sp6.1 |
| SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | kernel-source-coco | before 6.4.0-15061.15.coco15sp6.1 | 6.4.0-15061.15.coco15sp6.1 |
| SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | kernel-syms-coco | before 6.4.0-15061.15.coco15sp6.1 | 6.4.0-15061.15.coco15sp6.1 |
+28
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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 | 07ea878684dfb78a9d4f564c39d07e855a9e242e | Vendor (CNA) |
| Linux Linux | 594e47957f3fe034645e6885393ce96c12286334 | Vendor (CNA) |
| Linux Linux | 76ce2f9125244e1708d29c1d3f9d1d50b347bda0 | Vendor (CNA) |
| Linux Linux | 96941f29ebcc1e9cbf570dc903f30374909562f5 | Vendor (CNA) |
| Linux Linux | b3722fb69468693555f531cddda5c30444726dac | Vendor (CNA) |
| Linux Linux | f1e197a665c2148ebc25fe09c53689e60afea195 | Vendor (CNA) |
| Linux Linux | f251ccef1d864790e5253386e95544420b7cd8f3 | Vendor (CNA) |
| debian:linux | 6.1.99-1 · Debian:12 | Package registry (OSV) |
| opensuse:kernel-azure | 6.4.0-150600.8.31.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-source-azure | 6.4.0-150600.8.31.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| opensuse:kernel-syms-azure | 6.4.0-150600.8.31.1 · openSUSE:Leap 15.6 | Package registry (OSV) |
| suse:kernel-64kb | 6.4.0-150600.23.42.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP6 | Package registry (OSV) |
| suse:kernel-azure | 6.4.0-150600.8.31.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | Package registry (OSV) |
| suse:kernel-coco | 6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | Package registry (OSV) |
| suse:kernel-coco_debug | 6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | Package registry (OSV) |
| suse:kernel-default | 6.4.0-150600.23.42.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP6 | Package registry (OSV) |
| suse:kernel-default-base | 6.4.0-150600.23.42.2.150600.12.18.4 · SUSE:Linux Enterprise Module for Basesystem 15 SP6 | Package registry (OSV) |
| suse:kernel-docs | 6.4.0-150600.23.42.1 · SUSE:Linux Enterprise Module for Development Tools 15 SP6 | Package registry (OSV) |
| suse:kernel-source | 6.4.0-150600.23.42.1 · SUSE:Linux Enterprise Module for Basesystem 15 SP6 | Package registry (OSV) |
| suse:kernel-source-azure | 6.4.0-150600.8.31.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | Package registry (OSV) |
| suse:kernel-source-coco | 6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | Package registry (OSV) |
| suse:kernel-syms-azure | 6.4.0-150600.8.31.1 · SUSE:Linux Enterprise Module for Public Cloud 15 SP6 | Package registry (OSV) |
| suse:kernel-syms-coco | 6.4.0-15061.15.coco15sp6.1 · SUSE:Linux Enterprise Module for Confidential Computing Technical Preview 15 SP6 | Package registry (OSV) |
| suse:kernel-zfcpdump | 6.4.0-150600.23.42.2 · SUSE:Linux Enterprise Module for Basesystem 15 SP6 | 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.
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 researchersFinders, 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-24-0942 · Jul 16, 2024(Linux Kernel Güncellemesi)
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-667 · Improper LockingCVSS 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.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (10 more)Show less
- git.kernel.org/stable/c/594e47957f3fe034645e6885393ce96c12286334
- git.kernel.org/stable/c/76ce2f9125244e1708d29c1d3f9d1d50b347bda0
- git.kernel.org/stable/c/96941f29ebcc1e9cbf570dc903f30374909562f5
- git.kernel.org/stable/c/b3722fb69468693555f531cddda5c30444726dac
- git.kernel.org/stable/c/f1e197a665c2148ebc25fe09c53689e60afea195
- git.kernel.org/stable/c/f251ccef1d864790e5253386e95544420b7cd8f3
- lists.debian.org/debian-lts-announce/2025/01/msg00001.html
- cert-portal.siemens.com/productcert/html/ssa-265688.html
- cert-portal.siemens.com/productcert/html/ssa-355557.html
- cert-portal.siemens.com/productcert/html/ssa-613116.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.