CVE-2021-47518: nfc: fix potential NULL pointer deref in nfc_genl_dump_ses_done
Vulnerability summary
CVE-2021-47518 is a medium (CVSS 5.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.24% chance of exploitation in the next 30 days, higher than 15.4% of scored vulnerabilities.
Not severe (CVSS 5.5, local access); no exploitation reported by the 5 checked sources
Source freshness unavailable
How is this decided?Advisory lineage
Upstream 0 · Downstream 11 · Related 11Timeline
- 24-05-2024PublishedVulnerability first disclosed.
- 11-05-2026Last modifiedVulnerability information updated.
Description
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()).
CVSS metrics
4 scores · 3 sources · 2 versions- OSV · UbuntuEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
- OSV · DebianEcosystem advisory · calculated5.5MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
EPSS trend
Probability
0.24%
Chance of exploitation in the next 30 days
Percentile
15%
Versus all other CVEs
30-day change
No change 0.00 pp
From 0.24% on 04-10-2026
Known exploited
Compare KEV catalogs
CISA KEVNot in the CISA KEV catalog.
ENISA CNWNot in the ENISA CNW catalog.
CIRCLNot in the CIRCL catalog.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Known conditions: local access, low-privilege account, no user interaction (CVSS vector). Other conditions: not stated in public data.
Ubuntu88 products
- linuxAll versions (No fix recorded) | < 4.4.0-258.292 | < 4.15.0-169.177 | < 5.4.0-100.113
- linux-allwinner-5.19All versions (No fix recorded)
- linux-aws< 4.4.0-1135.141 | < 4.4.0-1173.188 | < 4.15.0-1121.129 | < 5.4.0-1066.69
- linux-aws-5.0All versions (No fix recorded)
- linux-aws-5.11All versions (No fix recorded)
Linux2 products
- linux≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 87cdb8789c38e44ae5454aafe277997c950d00ed | ≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 69bb79a8f5bb9f436b6f1434ca9742591b7bbe18 | ≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 811a7576747760bcaf60502f096d1e6e91d566fa | ≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 3b861a40325eac9c4c13b6c53874ad90617e944d | ≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 48fcd08fdbe05e35b650a252ec2a2d96057a1c7a | ≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 83ea620a1be840bf05089a5061fb8323ca42f38c | ≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < fae9705d281091254d4a81fa2da9d22346097dca | ≥ ac22ac466a659f1b2e02a2e2ee23fc5c42da2c95, < 4cd8371a234d051f9c9557fcbb1f8c523b1c0d10 | 3.12
- linux_kernel≥ 3.12, < 4.4.295 | ≥ 4.5, < 4.9.293 | ≥ 4.10, < 4.14.258 | ≥ 4.15, < 4.19.221 | ≥ 4.20, < 5.4.165 | ≥ 5.5, < 5.10.85 | ≥ 5.11, < 5.15.8
Debian1 product
- linux< 5.15.15-1
3 vendors · 91 products
