wifi: brcmfmac: Fix oops due to NULL pointer dereference in brcmf_sdiod_sglist_rw()
Noroxi assessment
Priority: Monitor (action score 22/100)
- The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
- Probability of exploitation in the next 30 days: 0.24% (FIRST EPSS).
- 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.
- Fixed version: Linux Linux 07c020c6d14d29e5a3ea4e4576b8ecf956a80834, 342f87d263462c2670b77ea9a32074cab2ac6fa1, 34941321b516bd7c6103bd01287d71a1804d19d3; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1.
Low priority for now. Upgrade to Linux Linux 07c020c6d14d29e5a3ea4e4576b8ecf956a80834, 342f87d263462c2670b77ea9a32074cab2ac6fa1, 34941321b516bd7c6103bd01287d71a1804d19d3; azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 6.6.76.1-1; azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 6.6.76.1-1 or later.
Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it
Primary sources: NVD · CVE.org · FIRST EPSS
In the Linux kernel, the following vulnerability has been resolved: wifi: brcmfmac: Fix oops due to NULL pointer dereference in brcmf_sdiod_sglist_rw() This patch fixes a NULL pointer dereference bug in brcmfmac that occurs when a high 'sd_sgentry_align' value applies (e.g. 512) and a lot of queued SKBs are sent from the pkt queue. The problem is the number of entries in the pre-allocated sgtable, it is nents = max(rxglom_size, txglom_size) + max(rxglom_size, txglom_size) >> 4 + 1. Given the default [rt]xglom_size=32 it's actually 35 which is too small. Worst case, the pkt queue can end up with 64 SKBs. This occurs when a new SKB is added for each original SKB if tailroom isn't enough to hold tail_pad. At least one sg entry is needed for each SKB. So, eventually the "skb_queue_walk loop" in brcmf_sdiod_sglist_rw may run out of sg entries. This makes sg_next return NULL and this causes the oops. The patch sets nents to max(rxglom_size, txglom_size) * 2 to be able handle the worst-case. Btw. this requires only 64-35=29 * 16 (or 20 if CONFIG_NEED_SG_DMA_LENGTH) = 464 additional bytes of memory.
- Published
- Dec 27, 2024
- Updated
- Jun 17, 2026
- EPSS
- 0.2% · 14th percentile
- CWE
- CWE-476
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.
Get told when this record changes
- Not in KEV: no record of exploitation in the wild
- No public exploit code on record
- A fix has been released
If any of these changes, we'll tell you in the daily email digest.
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Noroxi analysis
What does it mean in your environment?
The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.
We use this product, ask for helpAffected systems
Is your version affected?
Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.
| 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 5.4.287
- linux linux kernel5.5 and later · before 5.10.231
- linux linux kernel5.11 and later · before 5.15.174
- linux linux kernel5.16 and later · before 6.1.120
- linux linux kernel6.2 and later · before 6.6.66
- linux linux kernel6.7 and later · before 6.12.5
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
- 3.15affected
- af1fa210f4fc6e304b859b386a3c8a266b1110ab and later · before 342f87d263462c2670b77ea9a32074cab2ac6fa1affected · git
- af1fa210f4fc6e304b859b386a3c8a266b1110ab and later · before 7522d7d745d13fbeff3350fe6aa56c8dae263571affected · git
- af1fa210f4fc6e304b859b386a3c8a266b1110ab and later · before dfb3f9d3f602602de208da7bdcc0f6d5ee74af68affected · git
- af1fa210f4fc6e304b859b386a3c8a266b1110ab and later · before 67a25ea28f8ec1da8894f2f115d01d3becf67dc7affected · git
- af1fa210f4fc6e304b859b386a3c8a266b1110ab and later · before 07c020c6d14d29e5a3ea4e4576b8ecf956a80834affected · git
- af1fa210f4fc6e304b859b386a3c8a266b1110ab and later · before 34941321b516bd7c6103bd01287d71a1804d19d3affected · git
- af1fa210f4fc6e304b859b386a3c8a266b1110ab and later · before 857282b819cbaa0675aaab1e7542e2c0579f52d7affected · git
- before 3.15not affected · semver
- 5.4.287 and later · up to and including 5.4.*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 | before 6.1.123-1 | 6.1.123-1 |
| Debian:13 | linux | before 6.12.5-1 | 6.12.5-1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kernel-default | before 4.12.14-122.247.1 | 4.12.14-122.247.1 |
| SUSE:Linux Enterprise Live Patching 12 SP5 | kgraft-patch-SLE12-SP5_Update_65 | before 1-8.3.1 | 1-8.3.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | kernel-source | before 4.12.14-122.247.1 | 4.12.14-122.247.1 |
| SUSE:Linux Enterprise Server 12 SP5-LTSS | kernel-syms | before 4.12.14-122.247.1 | 4.12.14-122.247.1 |
Same product
linux: all recordsOther highest-scoring records for the same primary product.
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- 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 | 07c020c6d14d29e5a3ea4e4576b8ecf956a80834 | Vendor (CNA) |
| Linux Linux | 342f87d263462c2670b77ea9a32074cab2ac6fa1 | Vendor (CNA) |
| Linux Linux | 34941321b516bd7c6103bd01287d71a1804d19d3 | Vendor (CNA) |
| Linux Linux | 67a25ea28f8ec1da8894f2f115d01d3becf67dc7 | Vendor (CNA) |
| Linux Linux | 7522d7d745d13fbeff3350fe6aa56c8dae263571 | Vendor (CNA) |
| Linux Linux | 857282b819cbaa0675aaab1e7542e2c0579f52d7 | Vendor (CNA) |
| Linux Linux | dfb3f9d3f602602de208da7bdcc0f6d5ee74af68 | Vendor (CNA) |
| azl3 kernel 6.6.64.2-9 on Azure Linux 3.0 | 6.6.76.1-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| azl3 kernel 6.6.76.1-1 on Azure Linux 3.0 | 6.6.76.1-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| cbl2 kernel 5.15.173.1-2 on CBL Mariner 2.0 | 5.15.176.3-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| cbl2 kernel 5.15.173.1-2 on CBL-Mariner 2.0 | 5.15.176.3-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| cbl2 kernel 5.15.176.3-1 on CBL Mariner 2.0 | 5.15.176.3-1 · CBL-Mariner Releases | Microsoft (MSRC) |
| debian:linux | 6.1.123-1 · Debian:12 | Package registry (OSV) |
| suse:kernel-default | 4.12.14-122.247.1 · SUSE:Linux Enterprise Live Patching 12 SP5 | Package registry (OSV) |
| suse:kernel-source | 4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kernel-syms | 4.12.14-122.247.1 · SUSE:Linux Enterprise Server 12 SP5-LTSS | Package registry (OSV) |
| suse:kgraft-patch-SLE12-SP5_Update_65 | 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.
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
Show all references (8 more)Show less
- git.kernel.org/stable/c/342f87d263462c2670b77ea9a32074cab2ac6fa1
- git.kernel.org/stable/c/34941321b516bd7c6103bd01287d71a1804d19d3
- git.kernel.org/stable/c/67a25ea28f8ec1da8894f2f115d01d3becf67dc7
- git.kernel.org/stable/c/7522d7d745d13fbeff3350fe6aa56c8dae263571
- git.kernel.org/stable/c/857282b819cbaa0675aaab1e7542e2c0579f52d7
- git.kernel.org/stable/c/dfb3f9d3f602602de208da7bdcc0f6d5ee74af68
- lists.debian.org/debian-lts-announce/2025/03/msg00001.html
- lists.debian.org/debian-lts-announce/2025/03/msg00002.html
Vendor advisories and official records. Exploit/PoC links are deliberately left out.