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
Trending — 4 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

A fix is available — apply it.

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)
EG Risk
29(Track)
EG Risk 29/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity55% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
2%
KEV
Not listed

Published

April 3, 2026

Last Modified

July 24, 2026

Advisory Details (8)

Auto-updated Jul 25, 2026
No patch confirmed yet.
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/e1f0a18c9564cdb16523c802e2c6fe5874e3d944
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c85fe6580e86947ca07907ebf4363a73c156fda7
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a753844d2a8136f090123c8fb1ff6c7f6ee7c2b3
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/a12254050e3050f1011cd24f3b880a6882d0139d
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/508f49ccbe0329641bb681f7d0052bb4e5943252
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c9fb70a206a8734e10468ecc24d57c7596cf64e
generic

net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect - kernel/git/stable/linux.git - Linux kernel stable tree

https://git.kernel.org/stable/c/0c3e8bff808f17ad37a51d8e719eed22c7863120

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(18)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntulinux-tools-gcp-fips-6.8 (6.8.0-1064.72+fips1) @ noble2026-07-26ubuntu
ubuntulinux-virtual-6.8 (6.8.0-136.136) @ noble2026-07-26ubuntu
ubuntulinux-xilinx-zynqmp-tools-5.15.0-1075 (5.15.0-1075.79) @ jammy2026-07-26ubuntu
ubuntulinux-tools-lowlatency-hwe-22.04-edge (6.8.0-136.136.2~22.04.1) @ jammy2026-07-26ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.66~20.04.1) @ focal2026-07-26ubuntu
ubuntulinux-tools-oracle-edge (6.8.0-1058.61~22.04.1) @ jammy2026-07-26ubuntu
ubuntulinux-tools-nvidia-lowlatency-64k-6.8 (6.8.0-1059.62.1) @ noble2026-07-26ubuntu
ubuntulinux-tools-aws-edge (5.15.0.1112.119~20.04.1) @ focal2026-07-26ubuntu
ubuntulinux-tools-nvidia-tegra-rt-5.15 (5.15.0.1064.64) @ jammy2026-07-26ubuntu
ubuntulinux-tools-ibm-edge (5.15.0.1106.110~20.04.1) @ focal2026-07-26ubuntu
ubuntulinux-tools-aws-lts-24.04 (6.8.0-1061.64+1) @ noble2026-07-26ubuntu
ubuntulinux-tools-oracle-lts-22.04 (5.15.0.1109.105) @ jammy2026-07-26ubuntu
ubuntulinux-tools-azure-lts-24.04 (6.8.0-1063.71) @ noble2026-07-26ubuntu
ubuntulinux-tools-azure-fips-6.8 (6.8.0-1063.71+fips2) @ noble2026-07-26ubuntu
ubuntulinux-tools-azure-fde-lts-24.04 (6.8.0-1062.69) @ noble2026-07-26ubuntu
ubuntulinux-tools-azure-fde-6.8 (6.8.0-1062.69~22.04.1) @ jammy2026-07-26ubuntu
ubuntulinux-tools-azure-fde-lts-22.04 (5.15.0.1117.126) @ jammy2026-07-26ubuntu
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.

All Vendor Advisories

(17)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 45× 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 134 total refreshes for this CVE.

  1. 2026-07-30 01:30 UTCEPSS rescore
  2. 2026-07-27 14:13 UTCEPSS rescore
  3. 2026-07-26 14:54 UTCEPSS rescore
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  5. 2026-07-26 09:18 UTCEG score recompute
  6. 2026-07-26 09:18 UTCVendor advisory
  7. 2026-07-26 09:18 UTCGHSA enrichment
  8. 2026-07-25 14:17 UTCEPSS rescore
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  23. 2026-07-17 03:24 UTCOSV refresh
  24. 2026-07-16 17:03 UTCEPSS rescore
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  1. 2026-07-15 16:57 UTCEPSS rescore
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  54. 2026-06-11 22:02 UTCGHSA enrichment
  55. 2026-06-11 14:00 UTCEPSS rescore
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  57. 2026-06-10 14:24 UTCGHSA enrichment
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  63. 2026-06-07 15:25 UTCEPSS rescore
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  65. 2026-06-07 10:55 UTCEG score recompute▲ 5.50
  66. 2026-06-07 10:55 UTCGHSA enrichment
  67. 2026-06-06 13:47 UTCEPSS rescore
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Related CVEs(same product + same vendor + same CWE)

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 July 24, 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 0% probability of exploitation in the next 30 days, which ranks it in the top 97.5% of all scored CVEs.
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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