net: batman-adv: fix error handling
In the Linux kernel, the following vulnerability has been resolved: net: batman-adv: fix error handling Syzbot reported ODEBUG warning in batadv_nc_mesh_free(). The problem was in wrong error handling in batadv_mesh_init(). Before this patch batadv_mesh_init() was calling batadv_mesh_free() in case of any batadv_*_init() calls failure. This approach may work well, when there is some kind of indicator, which can tell which parts of batadv are initialized; but there isn't any. All written above lead to cleaning up uninitialized fields. Even if we hide ODEBUG warning by initializing bat_priv->nc.work, syzbot was able to hit GPF in batadv_nc_purge_paths(), because hash pointer in still NULL. [1] To fix these bugs we can unwind batadv_*_init() calls one by one. It is good approach for 2 reasons: 1) It fixes bugs on error handling path 2) It improves the performance, since we won't call unneeded batadv_*_free() functions. So, this patch makes all batadv_*_init() clean up all allocated memory before returning with an error to no call correspoing batadv_*_free() and open-codes batadv_mesh_free() with proper order to avoid touching uninitialized fields.
- Published
- May 22, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.7% · 53th percentile
- CWE
- CWE-544
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Report tools
Action score
21
Monitor
Low priority for now.
- CVSS
- 21 / 40 · 5.3 / 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.
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 kernel2.6.38 and later · before 4.4.293
- linux linux kernel4.5 and later · before 4.9.289
- linux linux kernel4.10 and later · before 4.14.254
- linux linux kernel4.15 and later · before 4.19.215
- linux linux kernel4.20 and later · before 5.4.157
- linux linux kernel5.5 and later · before 5.10.77
- linux linux kernel5.11 and later · before 5.14.16
- linux linux kernel5.15
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
- 2.6.38affected
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 0c6b199f09be489c48622537a550787fc80aea73affected · git
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20affected · git
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before e50f957652190b5a88a8ebce7e5ab14ebd0d3f00affected · git
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before fbf150b16a3635634b7dfb7f229d8fcd643c6c51affected · git
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 6422e8471890273994fe8cc6d452b0dcd2c9483eaffected · git
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before b0a2cd38553c77928ef1646ed1518486b1e70ae8affected · git
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before a8f7359259dd5923adc6129284fdad12fc5db347affected · git
- c6c8fea29769d998d94fcec9b9f14d4b52b349d3 and later · before 6f68cd634856f8ca93bafd623ba5357e0f648c68affected · git
- before 2.6.38not 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 5.15.3-1 | 5.15.3-1 |
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 | 07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20 | Vendor (CNA) |
| Linux Linux | 0c6b199f09be489c48622537a550787fc80aea73 | Vendor (CNA) |
| Linux Linux | 6422e8471890273994fe8cc6d452b0dcd2c9483e | Vendor (CNA) |
| Linux Linux | 6f68cd634856f8ca93bafd623ba5357e0f648c68 | Vendor (CNA) |
| Linux Linux | a8f7359259dd5923adc6129284fdad12fc5db347 | Vendor (CNA) |
| Linux Linux | b0a2cd38553c77928ef1646ed1518486b1e70ae8 | Vendor (CNA) |
| Linux Linux | e50f957652190b5a88a8ebce7e5ab14ebd0d3f00 | Vendor (CNA) |
| Linux Linux | fbf150b16a3635634b7dfb7f229d8fcd643c6c51 | Vendor (CNA) |
| debian:linux | 5.15.3-1 · 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
- Anyone who can reach it over the internet 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
- Network
- Attack complexity
- High
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- None
- Integrity impact
- None
- Availability impact
- High
Weakness class (CWE)
CWE-544 · Missing Standardized Error Handling MechanismCVSS vector
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
nvd-secondary
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.
Noroxi analysis
No Noroxi analysis for this record yet
We don't hand-write analysis for all 385,000+ vulnerabilities; 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 helpChange log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/07533f1a673ce1126d0a72ef1e4b5eaaa3dd6d20
- git.kernel.org/stable/c/0c6b199f09be489c48622537a550787fc80aea73
- git.kernel.org/stable/c/6422e8471890273994fe8cc6d452b0dcd2c9483e
- git.kernel.org/stable/c/6f68cd634856f8ca93bafd623ba5357e0f648c68
- git.kernel.org/stable/c/a8f7359259dd5923adc6129284fdad12fc5db347
- git.kernel.org/stable/c/b0a2cd38553c77928ef1646ed1518486b1e70ae8
- git.kernel.org/stable/c/e50f957652190b5a88a8ebce7e5ab14ebd0d3f00
- git.kernel.org/stable/c/fbf150b16a3635634b7dfb7f229d8fcd643c6c51
Vendor advisories and official records. Exploit/PoC links are deliberately left out.