Vulnerability in Linux kernel (CVE-2026-46248)
Summary
Vulnerability in Linux kernel (CVE-2026-46248). Risk of unauthorized operations or information disclosure.
Original description
The description as published by the source.
In the Linux kernel, the following vulnerability has been resolved:
wifi: ath12k: clear stale link mapping of ahvif->links_map
When an arvif is initialized in non-AP STA mode but MLO connection
preparation fails before the arvif is created
(arvif->is_created remains false), the error path attempts to delete all
links. However, link deletion only executes when arvif->is_created is true.
As a result, ahvif retains a stale entry of arvif that is initialized but
not created.
When a new arvif is initialized with the same link id, this stale mapping
triggers the following WARN_ON.
WARNING: drivers/net/wireless/ath/ath12k/mac.c:4271 at ath12k_mac_op_change_vif_links+0x140/0x180 [ath12k], CPU#3: wpa_supplicant/275
Call trace:
ath12k_mac_op_change_vif_links+0x140/0x180 [ath12k] (P)
drv_change_vif_links+0xbc/0x1a4 [mac80211]
ieee80211_vif_update_links+0x54c/0x6a0 [mac80211]
ieee80211_vif_set_links+0x40/0x70 [mac80211]
ieee80211_prep_connection+0x84/0x450 [mac80211]
ieee80211_mgd_auth+0x200/0x480 [mac80211]
ieee80211_auth+0x14/0x20 [mac80211]
cfg80211_mlme_auth+0x90/0xf0 [cfg80211]
nl80211_authenticate+0x32c/0x380 [cfg80211]
genl_family_rcv_msg_doit+0xc8/0x134
Fix this issue by unassigning the link vif and clearing ahvif->links_map
if arvif is only initialized but not created.
Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.5-01651-QCAHKSWPL_SILICONZ-1
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-46248 has been found in Linux kernel.
Risk of unauthorized operations or information disclosure. CVSS score: 5.5/10.
What to do: apply the vendor's official patched release.
If unsure, ask your IT team or search "Linux kernel CVE-2026-46248" on the vendor's site.
CVE-2026-46248 (Linux kernel) — CVSS v3 5.5
Attack vector: local / no user interaction
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (unclassified) exists in Linux kernel.
Check the vendor advisory for the affected versions of Linux kernel.
Severity: Medium (CVSS 5.5/10). Risk of unauthorized operations or information disclosure.
Update to the patched release per vendor advisory.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Linux kernel を使っているサービスとバージョンを洗い出す。
-
2Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- BellSoft Alpaquita BELL-CVE-2026-46248 linux-lts Fixed in: 6.18.35-r1
- Debian DEBIAN-CVE-2026-46248 linux Fixed in: 6.18.14-1
- Ubuntu UBUNTU-CVE-2026-46248 linux-hwe-edge
References
- advisory nvd.nist.gov
- advisory github.com
- package git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web git.kernel.org
- web github.com