8.8

CVE-2023-52502: net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn()

Modified
AliasesUBUNTU-CVE-2023-52502DEBIAN-CVE-2023-52502
Published 02-03-2024Last modified 05-08-2026

Vulnerability summary

CVE-2023-52502 is a high (CVSS 8.8) vulnerability in linux. EPSS estimates a 0.25% chance of exploitation in the next 30 days, higher than 16% of scored vulnerabilities.

Priority
Routine

Not severe (CVSS 8.8, adjacent network); no exploitation reported by the 5 checked sources

Source freshness unavailable

How is this decided?
CVSS score
8.8/10
010
High · v3.1 (CVE.org)
EPSS score
0.25%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedNot listed by any tracked catalog.
RansomwareNot flaggedNo ransomware use recorded.
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 96 · Related 96
SUSE-SU-2024:0856-1SUSE-SU-2024:0857-1SUSE-SU-2024:0925-1SUSE-SU-2024:0926-1SUSE-SU-2024:0975-1SUSE-SU-2024:0976-1

Timeline

  1. 02-03-2024
    PublishedVulnerability first disclosed.
  2. 05-08-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: net: nfc: fix races in nfc_llcp_sock_get() and nfc_llcp_sock_get_sn() Sili Luo reported a race in nfc_llcp_sock_get(), leading to UAF. Getting a reference on the socket found in a lookup while holding a lock should happen before releasing the lock. nfc_llcp_sock_get_sn() has a similar problem. Finally nfc_llcp_recv_snl() needs to make sure the socket found by nfc_llcp_sock_from_sn() does not disappear.

CVSS metrics

5 scores · 4 sources · 2 versions

EPSS trend

Probability

0.25%

Chance of exploitation in the next 30 days

Percentile

16%

Versus all other CVEs

30-day change

No change 0.00 pp

From 0.25% on 04-10-2026

04-10-202603-11-2026

Known exploited

Compare KEV catalogs
CISA KEV

Not in the CISA KEV catalog.

ENISA CNW

Not in the ENISA CNW catalog.

CIRCL

Not in the CIRCL catalog.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Version check

Known conditions: adjacent network, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu114 products
  • linuxAll versions (No fix recorded) | < 4.4.0-261.295 | < 4.15.0-231.243 | < 5.4.0-171.189 | < 5.15.0-94.104
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 4.4.0-1138.144 | < 4.4.0-1176.191 | < 4.15.0-1175.188 | < 5.4.0-1118.128 | < 5.15.0-1053.58
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8f50020ed9b81ba909ce9573f9d05263cdebf502, < e863f5720a5680e50c4cecf12424d7cc31b3eb0a | ≥ 8f50020ed9b81ba909ce9573f9d05263cdebf502, < 7adcf014bda16cdbf804af5c164d94d5d025db2d | ≥ 8f50020ed9b81ba909ce9573f9d05263cdebf502, < 6ac22ecdaad2ecc662048f8c6b0ceb1ca0699ef9 | ≥ 8f50020ed9b81ba909ce9573f9d05263cdebf502, < d888d3f70b0de32b4f51534175f039ddab15eef8 | ≥ 8f50020ed9b81ba909ce9573f9d05263cdebf502, < e4f2611f07c87b3ddb57c4b9e8efcd1e330fc3dc | ≥ 8f50020ed9b81ba909ce9573f9d05263cdebf502, < d1af8a39cf839d93c8967fdd858f6bbdc3e4a15c | ≥ 8f50020ed9b81ba909ce9573f9d05263cdebf502, < 31c07dffafce914c1d1543c135382a11ff058d93 | 3.6
  • linux_kernel≥ 3.6, < 4.19.297 | ≥ 4.20, < 5.4.259 | ≥ 5.5, < 5.10.199 | ≥ 5.11, < 5.15.136 | ≥ 5.16, < 6.1.59 | ≥ 6.2, < 6.5.8 | 6.6:rc1 | 6.6:rc2 | 6.6:rc3 | 6.6:rc4 | 6.6:rc5
Debian1 product
  • linux< 6.1.64-1 | < 6.5.8-1

3 vendors · 117 products

References

15 links
Show all 15 references