In the Linux kernel, the following vulnerability has been resolved: qede: Fix NULL pointer dereference in TPA fragment processing Under memory… (CVE-2026-89511)
A NULL pointer dereference vulnerability in the Linux kernel qede driver was resolved. The issue occurs under memory pressure when processing TPA continuation fragments, leading to a kernel panic. The root cause was a missing assignment of a buffer data pointer, causing invalid memory references during packet processing.
AI Analysis
Technical Summary
The Linux kernel qede driver had a vulnerability where, under memory pressure, a NULL pointer dereference could occur during TPA fragment processing. This was due to a dropped assignment of tpa_info->buffer.data in qede_tpa_start(), which caused the driver to recycle a physical page with an uninitialized (NULL) data pointer. When the hardware reused this ring slot, it passed a NULL page to qede_fill_frag_skb(), resulting in a kernel panic. The fix restored the missing assignment to ensure valid pages are tracked and recycled correctly.
Potential Impact
This vulnerability can cause a kernel panic (system crash) due to a NULL pointer dereference in the qede driver when handling network packets under memory pressure. This can lead to denial of service on affected systems running the vulnerable Linux kernel.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to restore the missing assignment in the qede driver. Users should apply the official kernel updates that include this patch. No additional mitigation steps are indicated beyond applying the fix.
In the Linux kernel, the following vulnerability has been resolved: qede: Fix NULL pointer dereference in TPA fragment processing Under memory… (CVE-2026-89511)
Description
A NULL pointer dereference vulnerability in the Linux kernel qede driver was resolved. The issue occurs under memory pressure when processing TPA continuation fragments, leading to a kernel panic. The root cause was a missing assignment of a buffer data pointer, causing invalid memory references during packet processing.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The Linux kernel qede driver had a vulnerability where, under memory pressure, a NULL pointer dereference could occur during TPA fragment processing. This was due to a dropped assignment of tpa_info->buffer.data in qede_tpa_start(), which caused the driver to recycle a physical page with an uninitialized (NULL) data pointer. When the hardware reused this ring slot, it passed a NULL page to qede_fill_frag_skb(), resulting in a kernel panic. The fix restored the missing assignment to ensure valid pages are tracked and recycled correctly.
Potential Impact
This vulnerability can cause a kernel panic (system crash) due to a NULL pointer dereference in the qede driver when handling network packets under memory pressure. This can lead to denial of service on affected systems running the vulnerable Linux kernel.
Mitigation Recommendations
A fix has been implemented in the Linux kernel to restore the missing assignment in the qede driver. Users should apply the official kernel updates that include this patch. No additional mitigation steps are indicated beyond applying the fix.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- GHSA-7j5j-83jx-4ffc
- Osv Schema Version
- 1.4.0
- Aliases
- ["CVE-2026-89511"]
Threat ID: 6aa4a01555bf5e2cf5a866db
Added to database: 09/12/2026, 00:43:01 UTC
Last enriched: 09/12/2026, 01:11:01 UTC
Last updated: 09/12/2026, 01:11:01 UTC
Views: 2
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