CVE-2026-23460

MEDIUMNVD 5.55.5—
EchelonGraph scoreMEDIUM confidence

Score 5.5 from GitHub Security Advisory published 2026-04-03. NVD baseline CVSS 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
5.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.5Exploit: NoneExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

In the Linux kernel, the following vulnerability has been resolved:

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect

syzkaller reported a bug [1], and the reproducer is available at [2].

ROSE sockets use four sk->sk_state values: TCP_CLOSE, TCP_LISTEN, TCP_SYN_SENT, and TCP_ESTABLISHED. rose_connect() already rejects calls for TCP_ESTABLISHED (-EISCONN) and TCP_CLOSE with SS_CONNECTING (-ECONNREFUSED), but lacks a check for TCP_SYN_SENT.

When rose_connect() is called a second time while the first connection attempt is still in progress (TCP_SYN_SENT), it overwrites rose->neighbour via rose_get_neigh(). If that returns NULL, the socket is left with rose->state == ROSE_STATE_1 but rose->neighbour == NULL. When the socket is subsequently closed, rose_release() sees ROSE_STATE_1 and calls rose_write_internal() -> rose_transmit_link(skb, NULL), causing a NULL pointer dereference.

Per connect(2), a second connect() while a connection is already in progress should return -EALREADY. Add this missing check for TCP_SYN_SENT to complete the state validation in rose_connect().

[1] https://syzkaller.appspot.com/bug?extid=d00f90e0af54102fb271 [2] https://gist.github.com/mrpre/9e6779e0d13e2c66779b1653fef80516

CVSS v3
5.5
EG Score
5.5(medium)
EPSS
2.5%
KEV
Not listed

Published

April 3, 2026

Last Modified

May 26, 2026

References (8)

Vendor Advisories for CVE-2026-23460(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
linuxKernel @ 5.10.253—osv

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 13× in last 7d / 48× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 112 total refreshes for this CVE.

  1. 2026-07-17 03:24 UTCOSV refresh
  2. 2026-07-16 17:03 UTCEPSS rescore
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  1. 2026-06-30 23:22 UTCEPSS rescore
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  32. 2026-06-11 22:02 UTCGHSA enrichment
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  40. 2026-06-08 11:27 UTCGHSA enrichment
  41. 2026-06-07 15:25 UTCEPSS rescore
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  43. 2026-06-07 10:55 UTCEG score recompute▲ 5.50
  44. 2026-06-07 10:55 UTCGHSA enrichment
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Frequently asked(5)

What is CVE-2026-23460?
CVE-2026-23460 is a medium vulnerability published on April 3, 2026. In the Linux kernel, the following vulnerability has been resolved: net/rose: fix NULL pointer dereference in rosetransmitlink on reconnect syzkaller reported a bug [1], and the reproducer is available at [2]. ROSE sockets use four sk->skstate values: TCPCLOSE, TCP_LISTEN, TCPSYNSENT, and…
When was CVE-2026-23460 disclosed?
CVE-2026-23460 was first published in the National Vulnerability Database on April 3, 2026, with the most recent update on May 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-23460 actively exploited?
CVE-2026-23460 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-23460?
CVE-2026-23460 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-23460?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-23460, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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