chardev: fix error handling in cdev_device_add()
In the Linux kernel, the following vulnerability has been resolved: chardev: fix error handling in cdev_device_add() While doing fault injection test, I got the following report: ------------[ cut here ]------------ kobject: '(null)' (0000000039956980): is not initialized, yet kobject_put() is being called. WARNING: CPU: 3 PID: 6306 at kobject_put+0x23d/0x4e0 CPU: 3 PID: 6306 Comm: 283 Tainted: G W 6.1.0-rc2-00005-g307c1086d7c9 #1253 Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.13.0-1ubuntu1.1 04/01/2014 RIP: 0010:kobject_put+0x23d/0x4e0 Call Trace: <TASK> cdev_device_add+0x15e/0x1b0 __iio_device_register+0x13b4/0x1af0 [industrialio] __devm_iio_device_register+0x22/0x90 [industrialio] max517_probe+0x3d8/0x6b4 [max517] i2c_device_probe+0xa81/0xc00 When device_add() is injected fault and returns error, if dev->devt is not set, cdev_add() is not called, cdev_del() is not needed. Fix this by checking dev->devt in error path.
- Published
- Sep 15, 2025
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 7th percentile
- CWE
- CWE-908
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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%
Noroxi analysis
No Noroxi analysis for this record yet
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We use this product, ask for helpAffected 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 kernel3.16.83 and later · before 3.17
- linux linux kernel4.4.224 and later · before 4.5
- linux linux kernel4.9.224 and later · before 4.9.337
- linux linux kernel4.12 and later · before 4.14.303
- linux linux kernel4.15 and later · before 4.19.270
- linux linux kernel4.20 and later · before 5.4.229
- linux linux kernel5.5 and later · before 5.10.163
- linux linux kernel5.11 and later · before 5.15.86
- linux linux kernel5.16 and later · before 6.0.16
- linux linux kernel6.1 and later · before 6.1.2
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
- f78b54e7d83c7879f9a6e49e6724019ca34177cc, d79d7d5c878809964da537336dad5ff55fa1605e, 4.12affected
- da97a80a657d1b1b50ef633e8ff5dbf0d417fc8d and later · before 5d2146889fad4cb9e6c13e790d4cfd871486eca8affected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before 6acf8597c5b04f455ee0649e11e5f3bcd28f381eaffected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before 34d17b39bceef25e4cf9805cd59250ae05d0a139affected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before d85b5247a79355b8432bfd9ac871f96117f750d4affected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before c46db6088bccff5115674d583fef46ede80077a2affected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before 28dc61cc49c6e995121c6d86bef4b73df78dda80affected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before b5de1eac71fec1af7723f1083d23a24789fd795caffected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before 85a5660491b507d33662b8e81c142e6041e642ebaffected · git
- 233ed09d7fdacf592ee91e6c97ce5f4364fbe7c0 and later · before 11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797affected · 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 6.1.4-1 | 6.1.4-1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kernel-default | before 4.12.14-122.275.1 | 4.12.14-122.275.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_73 | before 1-8.3.1 | 1-8.3.1 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-default | before 5.3.18-150300.59.232.1 | 5.3.18-150300.59.232.1 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-default-base | before 5.3.18-150300.59.232.1.150300.18.138.1 | 5.3.18-150300.59.232.1.150300.18.138.1 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-rt | before 5.3.18-150300.232.1 | 5.3.18-150300.232.1 |
| SUSE:Linux Enterprise Micro 5.2 | kernel-source-rt | before 5.3.18-150300.232.1 | 5.3.18-150300.232.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | kernel-source | before 4.12.14-122.275.1 | 4.12.14-122.275.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | kernel-syms | before 4.12.14-122.275.1 | 4.12.14-122.275.1 |
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 | 11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797 | Vendor (CNA) |
| Linux Linux | 28dc61cc49c6e995121c6d86bef4b73df78dda80 | Vendor (CNA) |
| Linux Linux | 3.17 | Vendor (CNA) |
| Linux Linux | 34d17b39bceef25e4cf9805cd59250ae05d0a139 | Vendor (CNA) |
| Linux Linux | 4.5 | Vendor (CNA) |
| Linux Linux | 4.9.337 | Vendor (CNA) |
| Linux Linux | 5d2146889fad4cb9e6c13e790d4cfd871486eca8 | Vendor (CNA) |
| Linux Linux | 6acf8597c5b04f455ee0649e11e5f3bcd28f381e | Vendor (CNA) |
| Linux Linux | 85a5660491b507d33662b8e81c142e6041e642eb | Vendor (CNA) |
| Linux Linux | b5de1eac71fec1af7723f1083d23a24789fd795c | Vendor (CNA) |
| Linux Linux | c46db6088bccff5115674d583fef46ede80077a2 | Vendor (CNA) |
| Linux Linux | d85b5247a79355b8432bfd9ac871f96117f750d4 | Vendor (CNA) |
| debian:linux | 6.1.4-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.275.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
| suse:kernel-default-base | 5.3.18-150300.59.232.1.150300.18.138.1 · SUSE:Linux Enterprise Micro 5.2 | Package registry (OSV) |
| suse:kernel-rt | 5.3.18-150300.232.1 · SUSE:Linux Enterprise Micro 5.2 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-122.275.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kernel-source-rt | 5.3.18-150300.232.1 · SUSE:Linux Enterprise Micro 5.2 | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-122.275.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kgraft-patch-SLE12-SP5_Update_73 | 1-8.3.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | 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.
- CVE-2024-50302301 days apartHID: core: zero-initialize the report bufferKEV52Plan
- CVE-2026-52989282 days apartnvmet-tcp: propagate nvmet_tcp_build_pdu_iovec() errors to its callers39Monitor
- CVE-2026-53225283 days apartsctp: fix uninit-value in __sctp_rcv_asconf_lookup()36Monitor
- CVE-2024-47685329 days apartnetfilter: nf_reject_ipv6: fix nf_reject_ip6_tcphdr_put()36Monitor
- CVE-2026-53170283 days apartaccel/ethosu: reject DMA commands with uninitialized length35Monitor
- CVE-2026-43139233 days apartxfrm6: fix uninitialized saddr in xfrm6_get_saddr()34Monitor
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-908 · Use of Uninitialized ResourceCVSS 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/11fa7fefe3d8fac7da56bc9aa3dd5fb3081ca797
- git.kernel.org/stable/c/28dc61cc49c6e995121c6d86bef4b73df78dda80
- git.kernel.org/stable/c/34d17b39bceef25e4cf9805cd59250ae05d0a139
- git.kernel.org/stable/c/5d2146889fad4cb9e6c13e790d4cfd871486eca8
- git.kernel.org/stable/c/6acf8597c5b04f455ee0649e11e5f3bcd28f381e
- git.kernel.org/stable/c/85a5660491b507d33662b8e81c142e6041e642eb
- git.kernel.org/stable/c/b5de1eac71fec1af7723f1083d23a24789fd795c
- git.kernel.org/stable/c/c46db6088bccff5115674d583fef46ede80077a2
- git.kernel.org/stable/c/d85b5247a79355b8432bfd9ac871f96117f750d4
Vendor advisories and official records. Exploit/PoC links are deliberately left out.