net: fix NULL pointer dereference in l3mdev_l3_rcv
In the Linux kernel, the following vulnerability has been resolved: net: fix NULL pointer dereference in l3mdev_l3_rcv When delete l3s ipvlan: ip link del link eth0 ipvlan1 type ipvlan mode l3s This may cause a null pointer dereference: Call trace: ip_rcv_finish+0x48/0xd0 ip_rcv+0x5c/0x100 __netif_receive_skb_one_core+0x64/0xb0 __netif_receive_skb+0x20/0x80 process_backlog+0xb4/0x204 napi_poll+0xe8/0x294 net_rx_action+0xd8/0x22c __do_softirq+0x12c/0x354 This is because l3mdev_l3_rcv() visit dev->l3mdev_ops after ipvlan_l3s_unregister() assign the dev->l3mdev_ops to NULL. The process like this: (CPU1) | (CPU2) l3mdev_l3_rcv() | check dev->priv_flags: | master = skb->dev; | | | ipvlan_l3s_unregister() | set dev->priv_flags | dev->l3mdev_ops = NULL; | visit master->l3mdev_ops | To avoid this by do not set dev->l3mdev_ops when unregister l3s ipvlan.
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for help- Published
- Apr 16, 2025
- Updated
- Sep 14, 2026
- EPSS
- 0.2% · 9th percentile
- CWE
- CWE-476
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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 · 0.2%
Affected systems
| 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 kernel5.1 and later · before 6.12.46
- linux linux kernel6.13 and later · before 6.14.2
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
- 5.1affected
- c675e06a98a474f7ad0af32ce467613da818da52 and later · before 1da52878f7fb74ace304f74325bb89e3e5546b55affected · git
- c675e06a98a474f7ad0af32ce467613da818da52 and later · before d97d6b1bd2b7f2a188d261d44c4519a13b8c406aaffected · git
- c675e06a98a474f7ad0af32ce467613da818da52 and later · before 8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862affected · git
- c675e06a98a474f7ad0af32ce467613da818da52 and later · before 52b44d8c653459c658b733d13658afdde45f6836affected · git
- c675e06a98a474f7ad0af32ce467613da818da52 and later · before 59599bce44af3df7a215ebc81cb166426e1c9204affected · git
- c675e06a98a474f7ad0af32ce467613da818da52 and later · before f9dff65140efc289f01bcf39c3ca66a8806b6132affected · git
- c675e06a98a474f7ad0af32ce467613da818da52 and later · before 0032c99e83b9ce6d5995d65900aa4b6ffb501cceaffected · git
- before 5.1not affected · semver
- 5.10.270 and later · up to and including 5.10.*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 | all versions | — |
| Debian:13 | linux | before 6.12.48-1 | 6.12.48-1 |
| Debian:14 | linux | before 6.16.3-1 | 6.16.3-1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
- 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
- CVE-2016-5195Race condition in mm/gup.c in the Linux kernel 2.x through 4.x before 4.8.3 allows local users to gain privileges by leveraging incorrect haKEV83Now
- CVE-2019-13272In the Linux kernel before 5.1.17, ptrace_link in kernel/ptrace.c mishandles the recording of the credentials of a process that wants to creKEV77This week
- CVE-2013-6282The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the v6k and v7 ARM platforms do not validate certain addKEV77This week
- CVE-2013-2094The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9 uses an incorrect integer data type, which allows loKEV77This week
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 | 0032c99e83b9ce6d5995d65900aa4b6ffb501cce | Vendor (CNA) |
| Linux Linux | 1da52878f7fb74ace304f74325bb89e3e5546b55 | Vendor (CNA) |
| Linux Linux | 52b44d8c653459c658b733d13658afdde45f6836 | Vendor (CNA) |
| Linux Linux | 59599bce44af3df7a215ebc81cb166426e1c9204 | Vendor (CNA) |
| Linux Linux | 8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862 | Vendor (CNA) |
| Linux Linux | d97d6b1bd2b7f2a188d261d44c4519a13b8c406a | Vendor (CNA) |
| Linux Linux | f9dff65140efc289f01bcf39c3ca66a8806b6132 | Vendor (CNA) |
| debian:linux | 6.12.48-1 · Debian:13 | 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).
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-476 · NULL Pointer DereferenceCVSS 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
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/0032c99e83b9ce6d5995d65900aa4b6ffb501cce
- git.kernel.org/stable/c/1da52878f7fb74ace304f74325bb89e3e5546b55
- git.kernel.org/stable/c/52b44d8c653459c658b733d13658afdde45f6836
- git.kernel.org/stable/c/59599bce44af3df7a215ebc81cb166426e1c9204
- git.kernel.org/stable/c/8da4d7f9141e8dbd3ece2f0e6930a0ea8812c862
- git.kernel.org/stable/c/d97d6b1bd2b7f2a188d261d44c4519a13b8c406a
- git.kernel.org/stable/c/f9dff65140efc289f01bcf39c3ca66a8806b6132
Vendor advisories and official records. Exploit/PoC links are deliberately left out.