CVE-2025-38617: net/packet: fix a race in packet_set_ring() and packet_notifier()
Noroxi assessment
Priority: Monitor (action score 18/100)
- 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: 0.42% (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 01d3c8417b9c1b884a8a981a3b886da556512f36, 18f13f2a83eb81be349a9757ba2141ff1da9ad73, 7da733f117533e9b2ebbd530a22ae4028713955c; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1.
- Severity is disputed: the assigning authority (CNA) scores it 7.8, NVD 4.7.
Low priority for now. Upgrade to Linux Linux 01d3c8417b9c1b884a8a981a3b886da556512f36, 18f13f2a83eb81be349a9757ba2141ff1da9ad73, 7da733f117533e9b2ebbd530a22ae4028713955c; azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 6.6.104.2-1; cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 5.15.200.1-1 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: net/packet: fix a race in packet_set_ring() and packet_notifier() When packet_set_ring() releases po->bind_lock, another thread can run packet_notifier() and process an NETDEV_UP event. This race and the fix are both similar to that of commit 15fe076edea7 ("net/packet: fix a race in packet_bind() and packet_notifier()"). There too the packet_notifier NETDEV_UP event managed to run while a po->bind_lock critical section had to be temporarily released. And the fix was similarly to temporarily set po->num to zero to keep the socket unhooked until the lock is retaken. The po->bind_lock in packet_set_ring and packet_notifier precede the introduction of git history.
- BDU:2025-15791
- SUSE-SU-2025:03283-1
- SUSE-SU-2025:03314-1
- SUSE-SU-2025:03383-1
- SUSE-SU-2025:20939-1
- SUSE-SU-2025:20940-1
- SUSE-SU-2025:20942-1
- SUSE-SU-2025:20943-1
- SUSE-SU-2025:20944-1
- SUSE-SU-2025:20945-1
- SUSE-SU-2025:20946-1
- SUSE-SU-2025:20947-1
- SUSE-SU-2025:20950-1
- SUSE-SU-2025:20951-1
- SUSE-SU-2025:20952-1
- SUSE-SU-2025:20953-1
- SUSE-SU-2025:20955-1
- SUSE-SU-2025:20956-1
- SUSE-SU-2025:20957-1
- SUSE-SU-2025:20959-1
- Published
- Aug 22, 2025
- Updated
- Oct 15, 2026
- EPSS
- 0.4% · 37th percentile
- CWE
- CWE-362
Report tools
Action score
18
Monitor
Low priority for now.
- CVSS
- 18 / 40 · 4.7 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.4%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
Vulnrichment: CISA's decision-tree inputs.
CNA vs NVD score
- NVD
- 4.7
- CNA · Linux
- 7.8
- 3.1 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.
Is your version affected? Check itNoroxi 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 |
| debian | debian linux | cpe:2.3:o:debian:debian_linux |
Affected versions
NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.
- debian debian linux11.0
- linux linux kernel5.5 and later · before 5.10.241
- linux linux kernel5.11 and later · before 5.15.190
- linux linux kernel5.16 and later · before 6.1.148
- linux linux kernel6.2 and later · before 6.6.102
- linux linux kernel2.6.13 and later · before 5.4.297
- linux linux kernel6.13 and later · before 6.15.10
- linux linux kernel6.16 and later · before 6.16.1
- linux linux kernel6.7 and later · before 6.12.42
- linux linux kernel2.6.12
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
- 2.6.12affected
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 18f13f2a83eb81be349a9757ba2141ff1da9ad73affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 7da733f117533e9b2ebbd530a22ae4028713955caffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before ba2257034755ae773722f15f4c3ad1dcdad15ca9affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 7de07705007c7e34995a5599aaab1d23e762d7caaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 88caf46db8239e6471413d28aabaa6b8bd552805affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f2e8fcfd2b1bc754920108b7f2cd75082c5a18dfaffected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before e50ccfaca9e3c671cae917dcb994831a859cf588affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before f1791fd7b845bea0ce9674fcf2febee7bc87a893affected · git
- 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 and later · before 01d3c8417b9c1b884a8a981a3b886da556512f36affected · git
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 6.1.148-1 | 6.1.148-1 |
| Debian:13 | linux | before 6.12.43-1 | 6.12.43-1 |
| Debian:14 | linux | before 6.16.3-1 | 6.16.3-1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-64kb | before 5.14.21-150400.24.176.1 | 5.14.21-150400.24.176.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-docs | before 5.14.21-150400.24.176.1 | 5.14.21-150400.24.176.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-obs-build | before 5.14.21-150400.24.176.1 | 5.14.21-150400.24.176.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-source | before 5.14.21-150400.24.176.1 | 5.14.21-150400.24.176.1 |
| SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | kernel-syms | before 5.14.21-150400.24.176.1 | 5.14.21-150400.24.176.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_63 | before 14-4.1 | 14-4.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_71 | before 4-4.1 | 4-4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_49 | before 19-150300.4.1 | 19-150300.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP3 | kernel-livepatch-SLE15-SP3_Update_60 | before 5-150300.2.1 | 5-150300.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_32 | before 18-150400.4.1 | 18-150400.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_33 | before 17-150400.4.1 | 17-150400.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_36 | before 10-150400.4.1 | 10-150400.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_39 | before 9-150400.4.1 | 9-150400.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_42 | before 7-150400.4.1 | 7-150400.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP4 | kernel-livepatch-SLE15-SP4_Update_43 | before 4-150400.2.1 | 4-150400.2.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_20 | before 18-150500.4.1 | 18-150500.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_22 | before 14-150500.4.1 | 14-150500.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_25 | before 9-150500.4.1 | 9-150500.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_26 | before 9-150500.4.1 | 9-150500.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_27 | before 8-150500.4.1 | 8-150500.4.1 |
| SUSE:Linux Enterprise Live Patching 15 SP5 | kernel-livepatch-SLE15-SP5_Update_29 | before 6-150500.4.1 | 6-150500.4.1 |
+46
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- CVE-2026-31431crypto: algif_aead - Revert to operating out-of-placeKEV90Now
- 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…KEV89Now
- CVE-2021-22555Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACEKEV85Now
Published before and after this one in the same product
- ← EarlierCVE-2025-38672Aug 22, 2025 · Revert "drm/gem-dma: Use dma_buf from GEM object instance"22Monitor
- ← EarlierCVE-2024-58239Aug 22, 2025 · tls: stop recv() if initial process_rx_list gave us non-DATA22Monitor
- Later →CVE-2025-38621Aug 22, 2025 · md: make rdev_addable usable for rcu mode22Monitor
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 | 01d3c8417b9c1b884a8a981a3b886da556512f36 | Vendor (CNA) |
| Linux Linux | 18f13f2a83eb81be349a9757ba2141ff1da9ad73 | Vendor (CNA) |
| Linux Linux | 7da733f117533e9b2ebbd530a22ae4028713955c | Vendor (CNA) |
| Linux Linux | 7de07705007c7e34995a5599aaab1d23e762d7ca | Vendor (CNA) |
| Linux Linux | 88caf46db8239e6471413d28aabaa6b8bd552805 | Vendor (CNA) |
| Linux Linux | ba2257034755ae773722f15f4c3ad1dcdad15ca9 | Vendor (CNA) |
| Linux Linux | e50ccfaca9e3c671cae917dcb994831a859cf588 | Vendor (CNA) |
| Linux Linux | f1791fd7b845bea0ce9674fcf2febee7bc87a893 | Vendor (CNA) |
| Linux Linux | f2e8fcfd2b1bc754920108b7f2cd75082c5a18df | Vendor (CNA) |
| azl3 kernel 6.6.96.2-2 on Azure Linux 3.0 | 6.6.104.2-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| cbl2 kernel 5.15.186.1-1 on CBL Mariner 2.0 | 5.15.200.1-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.148-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-64kb | 5.14.21-150400.24.176.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-default | 5.14.21-150400.24.176.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-default-base | 5.14.21-150400.24.176.1.150400.24.90.1 · SUSE:Linux Enterprise Micro 5.3 | Package registry (OSV) |
| suse:kernel-docs | 5.14.21-150400.24.176.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-livepatch-MICRO-6-0-RT_Update_4 | 12-1.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-livepatch-MICRO-6-0-RT_Update_5 | 11-1.1 · SUSE:Linux Micro 6.0 | Package registry (OSV) |
| suse:kernel-obs-build | 5.14.21-150400.24.176.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-rt | 5.14.21-150500.13.106.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-source | 5.14.21-150400.24.176.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-source-rt | 5.14.21-150500.13.106.1 · SUSE:Linux Enterprise Micro 5.5 | Package registry (OSV) |
| suse:kernel-syms | 5.14.21-150400.24.176.1 · SUSE:Linux Enterprise High Performance Computing 15 SP4-ESPOS | Package registry (OSV) |
| suse:kernel-zfcpdump | 5.14.21-150400.24.176.1 · SUSE:Linux Enterprise Server 15 SP4-LTSS | 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.
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.
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).
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
- none
- Integrity
- none
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-362 · Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')CVSS vector
CVSS:3.1/AV:L/AC:H/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.
Attack patterns (CAPEC)
ATT&CK techniques
—
Change log
- SSVC exploitation— → none
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
Show all references (12 more)Show less
- git.kernel.org/stable/c/01d3c8417b9c1b884a8a981a3b886da556512f36
- git.kernel.org/stable/c/18f13f2a83eb81be349a9757ba2141ff1da9ad73
- git.kernel.org/stable/c/7da733f117533e9b2ebbd530a22ae4028713955c
- git.kernel.org/stable/c/7de07705007c7e34995a5599aaab1d23e762d7ca
- git.kernel.org/stable/c/88caf46db8239e6471413d28aabaa6b8bd552805
- git.kernel.org/stable/c/ba2257034755ae773722f15f4c3ad1dcdad15ca9
- git.kernel.org/stable/c/e50ccfaca9e3c671cae917dcb994831a859cf588
- git.kernel.org/stable/c/f1791fd7b845bea0ce9674fcf2febee7bc87a893
- git.kernel.org/stable/c/f2e8fcfd2b1bc754920108b7f2cd75082c5a18df
- github.com/google/security-research/pull/339
- lists.debian.org/debian-lts-announce/2025/10/msg00007.html
- lists.debian.org/debian-lts-announce/2025/10/msg00008.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.