usb: typec: tcpm: Check for port partner validity before consuming it
In the Linux kernel, the following vulnerability has been resolved: usb: typec: tcpm: Check for port partner validity before consuming it typec_register_partner() does not guarantee partner registration to always succeed. In the event of failure, port->partner is set to the error value or NULL. Given that port->partner validity is not checked, this results in the following crash: Unable to handle kernel NULL pointer dereference at virtual address xx pc : run_state_machine+0x1bc8/0x1c08 lr : run_state_machine+0x1b90/0x1c08 .. Call trace: run_state_machine+0x1bc8/0x1c08 tcpm_state_machine_work+0x94/0xe4 kthread_worker_fn+0x118/0x328 kthread+0x1d0/0x23c ret_from_fork+0x10/0x20 To prevent the crash, check for port->partner validity before derefencing it in all the call sites.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for the hundreds of thousands of vulnerabilities in the database; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.
We use this product, ask for help- Published
- May 30, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 12th 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%
CISA SSVC decision
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
Vulnrichment: CISA's decision-tree inputs.
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 kernelbefore 6.1.91
- linux linux kernel6.2 and later · before 6.6.31
- linux linux kernel6.7 and later · before 6.8.10
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
- 2897b36d2482b84f35e659989d5cb4501fb31ccd, cbcf107780aecf51aba68488044a416d95060b6d, 6.6affected
- 31220bd89c22a18478f52fcd8069e8e2adb8f4f2 and later · before 2a07e6f0ad8a6e504a3912cfe8dc859b7d0740a5affected · git
- 9b7cd3fe01f0d03cf5820b351a6be2a6e0a6da6f and later · before d56d2ca03cc22123fd7626967d096d8661324e57affected · git
- c97cd0b4b54eb42aed7f6c3c295a2d137f6d2416 and later · before 789326cafbd1f67f424436b6bc8bdb887a364637affected · git
- c97cd0b4b54eb42aed7f6c3c295a2d137f6d2416 and later · before fc2b655cb6dd2b381f1f284989721002e39b6b77affected · git
- c97cd0b4b54eb42aed7f6c3c295a2d137f6d2416 and later · before ae11f04b452b5205536e1c02d31f8045eba249ddaffected · git
- 5.15.132 and later · before 5.15.168affected · semver
- 6.1.53 and later · before 6.1.91affected · semver
- 6.4.16 and later · before 6.5affected · semver
- 6.5.3 and later · before 6.6affected · 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 6.1.94-1 | 6.1.94-1 |
| Debian:13 | linux | before 6.8.11-1 | 6.8.11-1 |
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 | 2a07e6f0ad8a6e504a3912cfe8dc859b7d0740a5 | Vendor (CNA) |
| Linux Linux | 5.15.168 | Vendor (CNA) |
| Linux Linux | 6.1.91 | Vendor (CNA) |
| Linux Linux | 6.5 | Vendor (CNA) |
| Linux Linux | 6.6 | Vendor (CNA) |
| Linux Linux | 789326cafbd1f67f424436b6bc8bdb887a364637 | Vendor (CNA) |
| Linux Linux | ae11f04b452b5205536e1c02d31f8045eba249dd | Vendor (CNA) |
| Linux Linux | d56d2ca03cc22123fd7626967d096d8661324e57 | Vendor (CNA) |
| Linux Linux | fc2b655cb6dd2b381f1f284989721002e39b6b77 | Vendor (CNA) |
| debian:linux | 6.1.94-1 · Debian:12 | 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/2a07e6f0ad8a6e504a3912cfe8dc859b7d0740a5
- git.kernel.org/stable/c/789326cafbd1f67f424436b6bc8bdb887a364637
- git.kernel.org/stable/c/ae11f04b452b5205536e1c02d31f8045eba249dd
- git.kernel.org/stable/c/d56d2ca03cc22123fd7626967d096d8661324e57
- git.kernel.org/stable/c/fc2b655cb6dd2b381f1f284989721002e39b6b77
Vendor advisories and official records. Exploit/PoC links are deliberately left out.