9.8

CVE-2026-23112: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec

Modified
AliasesUBUNTU-CVE-2026-23112DEBIAN-CVE-2026-23112
Published 13-02-2026Last modified 19-10-2026

Vulnerability summary

CVE-2026-23112 is a critical (CVSS 9.8) Out-of-bounds Write vulnerability in linux. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 40.4% of scored vulnerabilities.

Priority
Prioritisesevere

Severe, CVSS 9.8 (CVE.org); no exploitation reported by the 5 checked sources; EPSS 0% (FIRST, 03-11-2026)

Source freshness unavailable

How is this decided?
CVSS score
9.8/10
010
Critical · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.04 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 29 · Related 30
DLA-4498-1DLA-4499-1DSA-6141-1DSA-6163-1LSN-120-1MGASA-2026-0097

Timeline

  1. 13-02-2026
    PublishedVulnerability first disclosed.
  2. 19-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: nvmet-tcp: add bounds checks in nvmet_tcp_build_pdu_iovec nvmet_tcp_build_pdu_iovec() could walk past cmd->req.sg when a PDU length or offset exceeds sg_cnt and then use bogus sg->length/offset values, leading to _copy_to_iter() GPF/KASAN. Guard sg_idx, remaining entries, and sg->length/offset before building the bvec.

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

40%

Versus all other CVEs

30-day change

Increase +0.04 pp

From 0.42% 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: network-reachable, no authentication, no user interaction (CVSS vector). Other conditions: not stated in public data.

Ubuntu152 products
  • linux< 5.4.0-229.249 | < 5.15.0-177.187 | < 6.8.0-111.111 | < 6.17.0-23.23
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-aws< 5.4.0-1158.168 | < 5.15.0-1106.113 | < 6.8.0-1053.56 | < 6.17.0-1013.13
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 872d26a391da92ed8f0c0f5cb5fef428067b7f30, < 0b9981751be14b59b4473383c731c833738aebdb | ≥ 872d26a391da92ed8f0c0f5cb5fef428067b7f30, < 42afe8ed8ad2de9c19457156244ef3e1eca94b5d | ≥ 872d26a391da92ed8f0c0f5cb5fef428067b7f30, < 1385be357e8acd09b36e026567f3a9d5c61139de | ≥ 872d26a391da92ed8f0c0f5cb5fef428067b7f30, < dca1a6ba0da9f472ef040525fab10fd9956db59f | ≥ 872d26a391da92ed8f0c0f5cb5fef428067b7f30, < 19672ae68d52ff75347ebe2420dde1b07adca09f | ≥ 872d26a391da92ed8f0c0f5cb5fef428067b7f30, < ab200d71553bdcf4de554a5985b05b2dd606bc57 | ≥ 872d26a391da92ed8f0c0f5cb5fef428067b7f30, < 52a0a98549344ca20ad81a4176d68d28e3c05a5c | 5.0
  • linux_kernel≥ 5.0, < 5.10.250 | ≥ 5.11, < 5.15.200 | ≥ 5.16, < 6.1.163 | ≥ 6.2, < 6.6.124 | ≥ 6.7, < 6.12.70 | ≥ 6.13, < 6.18.10 | 6.19:rc1 | 6.19:rc2 | 6.19:rc3 | 6.19:rc4 | 6.19:rc5 | 6.19:rc6 | 6.19:rc7 | 6.19:rc8
Debian1 product
  • linux< 6.1.164-1 | < 6.12.73-1 | < 6.18.10-1

3 vendors · 155 products

References

33 links
Show all 33 references