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CVE-2026-90250— bpf, cgroup: Fix storage null-ptr-deref after replacing prog

Quick assessment

Affected
Linux Linux
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

在 Linux 内核中，以下漏洞已得到修复： BPF、cgroup：修复在替换程序（prog）后发生的存储空指针引用（null-ptr-deref）问题 Syzkaller 报告了在替换 BPF 程序后出现的存储空指针引用问题。该问题发生在以下场景中： 1. 一个空的 BPF 程序（prog A）被附加到一个 cgroup 上。 2. 另一个程序（prog B）使用 映射类型，并调用 辅助函数。 3. 调用 以将 prog A 替换为 prog B。 根本原因： 函数未能成功分配并绑定新程序所需的 cgroup 存

AI Predicted 5.5 Difficulty: Hard

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 10

VendorProduct Version RangeStatus
Linux Linux 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab< a033c950f6731be88a7da98604ed78f302f15b80 affected
0c991ebc8c69d29b7fc44db17075c5aa5253e2ab< 1ab3da12061d7ccb099f7e925fa2d865967a316a affected
0c991ebc8c69d29b7fc44db17075c5aa5253e2ab< 12feca126831556dc7fabe5a3ba28fbd328768b6 affected
0c991ebc8c69d29b7fc44db17075c5aa5253e2ab< 3f562c537e9ecf4bc5e206cfffc2cc047f1b7e94 affected
5.7 affected
< 5.7 unaffected
6.12.110≤ 6.12.* unaffected
6.18.52≤ 6.18.* unaffected
… +2 more rows
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I. Basic Information for CVE-2026-90250

Vulnerability Information
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Vulnerability Title
bpf, cgroup: Fix storage null-ptr-deref after replacing prog
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Linux Linux 0c991ebc8c69d29b7fc44db17075c5aa5253e2ab ~ a033c950f6731be88a7da98604ed78f302f15b80 -
Linux Linux 5.7 -

II. Public POCs for CVE-2026-90250

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III. Intelligence Information for CVE-2026-90250

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Patches & Fixes for CVE-2026-90250 (3)

Other References for CVE-2026-90250 (1)

Same Patch Batch · Linux · 2026-09-17 · 602 CVEs total

CVE-2026-90257 Bluetooth: virtio_bt: avoid OOB read of build info string
CVE-2026-90238 media: amd: isp4: fix self-deadlock in isp4sd_pwron_and_init() error path
CVE-2026-90240 iommu/vt-d: Flush context cache with correct SID when tearing down aliases
CVE-2026-90239 media: amd: isp4: release partial allocations in isp4if_alloc_fw_gpumem()
CVE-2026-90241 iommu/vt-d: Tear down scalable-mode context on probe failure
CVE-2026-90243 iommu/vt-d: Clear Present bit before tearing down copied context entry
CVE-2026-90242 iommu/vt-d: Fix iopf_refcount leak on RID domain replacement
CVE-2026-90244 iommu/dma: Restore locking around msi_page_list
CVE-2026-90245 fbdev: kyro: Validate overlay viewport coordinates
CVE-2026-90246 apparmor: fix integer overflow in verify_tags() bounds check
CVE-2026-90247 bpf: Fix mmap_lock leak in irq_work path
CVE-2026-90248 net/sched: cls_api: fix teardown of an adopted proto on insert-race loss
CVE-2026-90249 iio: light: gp2ap002: Fix unbalanced runtime PM on repeated event writes
CVE-2026-90251 Bluetooth: MSFT: validate evt_prefix_len against the response length
CVE-2026-90253 Bluetooth: MGMT: free the mesh send cancel command when it is cancelled
CVE-2026-90252 Bluetooth: MGMT: free the HCI command when it is cancelled
CVE-2026-90254 Bluetooth: hci_sync: free the advertising instance on the failure and cancel paths
CVE-2026-90256 Bluetooth: L2CAP: use proto_lock for l2cap_data to fix l2cap_disconn_ind
CVE-2026-90255 Bluetooth: hci_conn: fix the SCO setup context lifetime
CVE-2026-90267 scsi: sd: Fix special_vec mempool leak when scsi_alloc_sgtables() fails

Showing top 20 of 602 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Linux
Same vendor: Linux

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