batman-adv: bla: fix report_work leak on backbone_gw purge
In the Linux kernel, the following vulnerability has been resolved: batman-adv: bla: fix report_work leak on backbone_gw purge batadv_bla_purge_backbone_gw() removes stale backbone gateway entries, but fails to properly handle their associated report_work: - If report_work is running, the purge must wait for it to finish before freeing the backbone_gw, otherwise the worker may access freed memory (e.g. bat_priv). - If report_work is pending, the purge must cancel it and release the reference held for that pending work item. The previous implementation called hlist_for_each_entry_safe() inside a spin_lock_bh() section, but cancel_work_sync() may sleep and therefore cannot be called from within a spinlock-protected region. Restructure the loop to handle one entry per spinlock critical section: acquire the lock, find the next entry to purge, remove it from the hash list, then release the lock before calling cancel_work_sync() and dropping the hash_entry reference. Repeat until no more entries require purging.
- Published
- Jul 24, 2026
- Updated
- Aug 11, 2026
- EPSS
- 0.2% · 6th percentile
- CWE
- —
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Report tools
Action score
31
Monitor
Low priority for now.
- CVSS
- 31 / 40 · 7.8 / 10
- CISA KEV
- 0 / 30 · Not listed
- EPSS
- 0 / 30 · 0.2%
CNA vs NVD score
- NVD
- —
- CNA · Linux
- 7.8
- NVD has not scored this yet; the score shown is the CNA’s.
The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.
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 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 kernel3.5 and later · before 5.10.258
- linux linux kernel5.11 and later · before 5.15.209
- linux linux kernel5.16 and later · before 6.1.175
- linux linux kernel6.2 and later · before 6.6.142
- linux linux kernel6.7 and later · before 6.12.92
- linux linux kernel6.13 and later · before 6.18.34
- linux linux kernel6.19 and later · before 7.0.11
- linux linux kernel7.1
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
- 3.5affected
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before ce2c0ee4d76d5ee4b391fe0e31334361e25030ecaffected · git
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 3423a45e5c3d3c5129f88143a9a969787d7d5a0aaffected · git
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before f1303adb1e59582f76c22798a2e2e150e054a9e7affected · git
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 48663158222b3b7f6ee6791a67d512ede7fc94bbaffected · git
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before eeddd7bab3d59c1e98642a204141f8c5d6194707affected · git
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before c6de1a5a9c406e30b91f1515a6ce05cc84023baaaffected · git
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 95a7034661274cf5985708bd2f6d86ee46f88fa9affected · git
- 23721387c409087fd3b97e274f34d3ddc0970b74 and later · before 0459430add32ea41f3e2ef9351610e6d33627a6baffected · git
- before 3.5not 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 6.1.176-1 | 6.1.176-1 |
| Debian:13 | linux | before 6.12.94-1 | 6.12.94-1 |
| Debian:14 | linux | before 7.0.12-1 | 7.0.12-1 |
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 | 0459430add32ea41f3e2ef9351610e6d33627a6b | Vendor (CNA) |
| Linux Linux | 3423a45e5c3d3c5129f88143a9a969787d7d5a0a | Vendor (CNA) |
| Linux Linux | 48663158222b3b7f6ee6791a67d512ede7fc94bb | Vendor (CNA) |
| Linux Linux | 95a7034661274cf5985708bd2f6d86ee46f88fa9 | Vendor (CNA) |
| Linux Linux | c6de1a5a9c406e30b91f1515a6ce05cc84023baa | Vendor (CNA) |
| Linux Linux | ce2c0ee4d76d5ee4b391fe0e31334361e25030ec | Vendor (CNA) |
| Linux Linux | eeddd7bab3d59c1e98642a204141f8c5d6194707 | Vendor (CNA) |
| Linux Linux | f1303adb1e59582f76c22798a2e2e150e054a9e7 | Vendor (CNA) |
| debian:linux | 6.1.176-1 · 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).
National notice (Türkiye Cybersecurity Directorate / USOM)
Official security notices citing this record; remediation advice is on the agency's page.
- TR-26-0636 · Jul 27, 2026(Linux Kernel Güvenlik Bildirimi)
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
- high · data can be read
- Integrity
- high · data or configuration can be modified
- Availability
- high · the service can be disrupted
- Attack vector
- Local
- Attack complexity
- Low
- Privileges required
- Low
- User interaction
- None
- Scope
- Unchanged
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
Weakness class (CWE)
—
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/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.
Change log
- Fix✗ → ✓
For records you follow, these changes also arrive as notifications. →
References
- git.kernel.org/stable/c/0459430add32ea41f3e2ef9351610e6d33627a6b
- git.kernel.org/stable/c/3423a45e5c3d3c5129f88143a9a969787d7d5a0a
- git.kernel.org/stable/c/48663158222b3b7f6ee6791a67d512ede7fc94bb
- git.kernel.org/stable/c/95a7034661274cf5985708bd2f6d86ee46f88fa9
- git.kernel.org/stable/c/c6de1a5a9c406e30b91f1515a6ce05cc84023baa
- git.kernel.org/stable/c/ce2c0ee4d76d5ee4b391fe0e31334361e25030ec
- git.kernel.org/stable/c/eeddd7bab3d59c1e98642a204141f8c5d6194707
- git.kernel.org/stable/c/f1303adb1e59582f76c22798a2e2e150e054a9e7
Vendor advisories and official records. Exploit/PoC links are deliberately left out.