CVE-2026-90250 (GCVE-0-2026-90250)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:07 – Updated: 2026-10-21 12:50
VLAI
Title
bpf, cgroup: Fix storage null-ptr-deref after replacing prog
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf, cgroup: Fix storage null-ptr-deref after replacing prog Syzkaller reported a storage null-ptr-deref issue after replacing prog. This occurs in the following scenario: 1. prog A, an empty prog, is attached to a cgrp. 2. prog B uses BPF_MAP_TYPE_PERCPU_CGROUP_STORAGE and calls the bpf_get_local_storage helper. 3. link_update is called to replace prog A with prog B. The reason is that __cgroup_bpf_replace fails to alloc and assign the required cgrp storage for the incoming replacement prog. Consequently, the new prog inherits an uninit storage, leading to null-ptr-deref panic when kick the new prog. Fix this by rejecting a link update if new_prog's cgroup storage is incompatible with link->prog.
Severity
No CVSS data available.
Assigner
Linux CNA under the mitre root
CNA scorecard D 53/100 over 7061 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab , < 16c8321ee40c420f8e02e09515a5126682ddf4ea (git)
Affected: 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab , < a033c950f6731be88a7da98604ed78f302f15b80 (git)
Affected: 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab , < 1ab3da12061d7ccb099f7e925fa2d865967a316a (git)
Affected: 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab , < 12feca126831556dc7fabe5a3ba28fbd328768b6 (git)
Affected: 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab , < 3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94 (git)
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Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 6.6.160 , ≤ 6.6.* (semver)
Unaffected: 6.12.110 , ≤ 6.12.* (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3 , ≤ * (original_commit_for_fix)
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Show details on NVD website
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{
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          "programFiles": [
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        }
      ],
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        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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    "datePublished": "2026-09-17T16:07:51.403Z",
    "dateReserved": "2026-09-11T19:38:34.795Z",
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        "metrics": {},
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      "cve": "CVE-2026-90250",
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      "title": "kernel: bpf, cgroup: Fix storage null-ptr-deref after replacing prog",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-90250.json",
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      "cve": "CVE-2026-90250",
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      "status": "interim",
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}



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