5.5

CVE-2026-23339: linux

CVSS: 5.5v3.1MediumModified
AliasesUBUNTU-CVE-2026-23339DEBIAN-CVE-2026-23339
Published 25-03-2026Last modified 15-10-2026
Open JSON

Vulnerability summary

CVE-2026-23339 is a medium (CVSS 5.5) vulnerability in linux. EPSS estimates a 0.13% chance of exploitation in the next 30 days, higher than 2% of scored vulnerabilities.

Overall risk
22/100
0100
Low · default modelHow is this calculated?
CVSS score
5.5/10
010
Medium · v3.1 (NVD)
EPSS score
0.13%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 31 · Related 29
MGASA-2026-0097MGASA-2026-0098SUSE-SU-2026:21834-1SUSE-SU-2026:2238-1USN-8567-1USN-8574-1

Timeline

  1. 25-03-2026
    PublishedVulnerability first disclosed.
  2. 15-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: nfc: nci: free skb on nci_transceive early error paths nci_transceive() takes ownership of the skb passed by the caller, but the -EPROTO, -EINVAL, and -EBUSY error paths return without freeing it. Due to issues clearing NCI_DATA_EXCHANGE fixed by subsequent changes the nci/nci_dev selftest hits the error path occasionally in NIPA, and kmemleak detects leaks: unreferenced object 0xff11000015ce6a40 (size 640): comm "nci_dev", pid 3954, jiffies 4295441246 hex dump (first 32 bytes): 6b 6b 6b 6b 00 a4 00 0c 02 e1 03 6b 6b 6b 6b 6b kkkk.......kkkkk 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b 6b kkkkkkkkkkkkkkkk backtrace (crc 7c40cc2a): kmem_cache_alloc_node_noprof+0x492/0x630 __alloc_skb+0x11e/0x5f0 alloc_skb_with_frags+0xc6/0x8f0 sock_alloc_send_pskb+0x326/0x3f0 nfc_alloc_send_skb+0x94/0x1d0 rawsock_sendmsg+0x162/0x4c0 do_syscall_64+0x117/0xfc0

CVSS metrics

3 scores · 3 sources · 1 version

EPSS trend

Probability

0.13%

Chance of exploitation in the next 30 days

Percentile

2%

Versus all other CVEs

30-day change

0.00 pp

From 0.12% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.13%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Ubuntu157 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-136.136
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1061.64
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < b367cb44d919f35b07cd56feffa15e68cd9f53f9 | ≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < 6d898f943766440cf766d30364e715111c3563b5 | ≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < 33f6b8a96dda045789796c3bcb451c74ac158039 | ≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < dcbcccfc5195c9caaa4bb8d31f23c345f00a9e89 | ≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < 3245801d44a44c090acefe19a12d22d12cac45c5 | ≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < 9d448bbab724b94d6c561e1f314656f5b88a7cb3 | ≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < 54f7f0eaafa56b5994cdb5c7967946922c2e1d22 | ≥ 6a2968aaf50c7a22fced77a5e24aa636281efca8, < 7bd4b0c4779f978a6528c9b7937d2ca18e936e2c | 3.2
  • linux_kernel≥ 3.2.1, < 5.10.253 | ≥ 5.11, < 5.15.203 | ≥ 5.16, < 6.1.167 | ≥ 6.2, < 6.6.130 | ≥ 6.7, < 6.12.77 | ≥ 6.13, < 6.18.17 | ≥ 6.19, < 6.19.7 | 3.2 | 7.0:rc1 | 7.0:rc2 | 7.0:rc3 | 7.0:rc4 | 7.0:rc5 | 7.0:rc6 | 7.0:rc7
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.19.8-1

3 vendors · 160 products

References

40 links
Show all 40 references