7.5

CVE-2026-23242: linux NULL Pointer Dereference

CVSS: 7.5v3.1HighModified
AliasesUBUNTU-CVE-2026-23242DEBIAN-CVE-2026-23242
Published 18-03-2026Last modified 16-10-2026
Open JSON

Vulnerability summary

CVE-2026-23242 is a high (CVSS 7.5) NULL Pointer Dereference vulnerability in linux. EPSS estimates a 0.47% chance of exploitation in the next 30 days, higher than 38.9% of scored vulnerabilities.

Overall risk
30/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.5/10
010
High · v3.1 (CVE.org)
EPSS score
0.47%
0%100%
Low · +0.02 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 34 · Related 32
MGASA-2026-0097MGASA-2026-0098OPENSUSE-SU-2026:20572-1SUSE-SU-2026:1573-1SUSE-SU-2026:21114-1SUSE-SU-2026:21123-1

Timeline

  1. 18-03-2026
    PublishedVulnerability first disclosed.
  2. 16-10-2026
    Last modifiedVulnerability information updated.

Description

In the Linux kernel, the following vulnerability has been resolved: RDMA/siw: Fix potential NULL pointer dereference in header processing If siw_get_hdr() returns -EINVAL before set_rx_fpdu_context(), qp->rx_fpdu can be NULL. The error path in siw_tcp_rx_data() dereferences qp->rx_fpdu->more_ddp_segs without checking, which may lead to a NULL pointer deref. Only check more_ddp_segs when rx_fpdu is present. KASAN splat: [ 101.384271] KASAN: null-ptr-deref in range [0x00000000000000c0-0x00000000000000c7] [ 101.385869] RIP: 0010:siw_tcp_rx_data+0x13ad/0x1e50

CVSS metrics

4 scores · 4 sources · 1 version

EPSS trend

Probability

0.47%

Chance of exploitation in the next 30 days

Percentile

39%

Versus all other CVEs

30-day change

+0.02 pp

From 0.45% on 18-09-2026

18-09-202618-10-2026
EPSS score
0.47%

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

Ubuntu153 products
  • linuxAll versions (No fix recorded) | < 5.15.0-186.196 | < 6.8.0-134.134
  • linux-allwinner-5.19All versions (No fix recorded)
  • linux-awsAll versions (No fix recorded) | < 5.15.0-1112.119 | < 6.8.0-1060.63
  • linux-aws-5.0All versions (No fix recorded)
  • linux-aws-5.11All versions (No fix recorded)
Linux2 products
  • linux≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < ab61841633d10e56a58c1493a262f0d02dba2f5e | ≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < 8564dcc12fbb372d984ab45768cae9335777b274 | ≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < ab957056192d6bd068b3759cb2077d859cca01f0 | ≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < ffba40b67663567481fa8a1ed5d2da36897c175d | ≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < 87b7a036d2c73d5bb3ae2d47dee23de465db3355 | ≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < 714c99e1dc8f85f446e05be02ba83972e981a817 | ≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < ce025f7f5d070596194315eb2e4e89d568b8a755 | ≥ 8b6a361b8c482f22ac99c3273285ff16b23fba91, < 14ab3da122bd18920ad57428f6cf4fade8385142 | 5.3
  • linux_kernel≥ 5.3.1, < 5.10.252 | ≥ 5.11, < 5.15.202 | ≥ 5.16, < 6.1.165 | ≥ 6.2, < 6.6.128 | ≥ 6.7, < 6.12.75 | ≥ 6.13, < 6.18.14 | ≥ 6.19, < 6.19.4 | 5.3
Debian1 product
  • linux< 6.1.170-1 | < 6.12.85-1 | < 6.18.14-1

3 vendors · 156 products

References

41 links
Show all 41 references