nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
Priority LOW 24CWE-476Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA. Impact type from CWE-476.
Summary
In the Linux kernel, the following vulnerability has been resolved: nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done The done() netlink callback nfc_genl_dump_ses_done() should check if received argument is non-NULL, because its allocation could fail earlier in dumpit() (nfc_genl_dump_ses()).
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00242 15th percentileScored 2026-11-07
Fix Fixed Linux (Linux): 4.4.295, 4.9.293, 4.14.258 +5
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Linux | Linux | 3.12 and later | 4.4.295, 4.9.293, 4.14.258, 4.19.221, 5.4.165, 5.10.85, 5.15.8, 5.16 | Patch available | CNA |
- Linux VendorLinux Affected 3.12 and later Fixed in 4.4.295, 4.9.293, 4.14.258, 4.19.221, 5.4.165, 5.10.85, 5.15.8, 5.16 Patch available CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* | 3.12 to before 4.4.295; 4.5 to before 4.9.293; 4.10 to before 4.14.258; 4.15 to before 4.19.221; 4.20 to before 5.4.165; 5.5 to before 5.10.85; 5.11 to before 5.15.8 | Vulnerable | Linux |
- cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* Versions 3.12 to before 4.4.295; 4.5 to before 4.9.293; 4.10 to before 4.14.258; 4.15 to before 4.19.221; 4.20 to before 5.4.165; 5.5 to before 5.10.85; 5.11 to before 5.15.8 Vulnerable ·Linux
Remediation
- Fix · CNA Linux (Linux) Fixed in 4.4.295, 4.9.293, 4.14.258, 4.19.221, 5.4.165, 5.10.85, 5.15.8, 5.16
Vendor assessments
Red Hat
Red Hat rating: Low. Red Hat's page for this CVE →
Not affected: 4 products
- Red Hat Enterprise Linux 6
- Red Hat Enterprise Linux 7
- Red Hat Enterprise Linux 8
- Red Hat Enterprise Linux 9
Timeline
- 2026-10-02 Threatist record created from CVE-2021-47518
References
Patch 8
- https://git.kernel.org/stable/c/87cdb8789c38e44ae5454aafe277997c950d00ed
- https://git.kernel.org/stable/c/69bb79a8f5bb9f436b6f1434ca9742591b7bbe18
- https://git.kernel.org/stable/c/811a7576747760bcaf60502f096d1e6e91d566fa
- https://git.kernel.org/stable/c/3b861a40325eac9c4c13b6c53874ad90617e944d
- https://git.kernel.org/stable/c/48fcd08fdbe05e35b650a252ec2a2d96057a1c7a
- https://git.kernel.org/stable/c/83ea620a1be840bf05089a5061fb8323ca42f38c
- https://git.kernel.org/stable/c/fae9705d281091254d4a81fa2da9d22346097dca
- https://git.kernel.org/stable/c/4cd8371a234d051f9c9557fcbb1f8c523b1c0d10
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- TI-2026-38352 netfilter: bridge: make ebt_snat ARP rewrite writable KEVCVSS 3.1HIGH 8.8
- TI-2013-05264 The (1) get_user and (2) put_user API functions in the Linux kernel before 3.5.5 on the… KEVCVSS 3.1HIGH 8.8
- TI-2022-00125 Integer overflow in kernel KEVCVSS 3.1HIGH 8.4
- TI-2013-01864 The perf_swevent_init function in kernel/events/core.c in the Linux kernel before 3.8.9… KEVCVSS 3.1HIGH 8.4
- TI-2021-05514 Heap Out-Of-Bounds Write in Netfilter IP6T_SO_SET_REPLACE KEVCVSS 3.1HIGH 8.3
Sources
- CVE-2021-47518 · CVE Program
- CVE-2021-47518 · NVD
- FIRST EPSS
- CVE-2021-47518 · Red Hat security data · CC BY 4.0
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