CVE-2026-97506 — crypto: ixp4xx - fix buffer chain unwind on allocation failure
In the Linux kernel, the following vulnerability has been resolved: crypto: ixp4xx - fix buffer chain unwind on allocation failure chainup_buffers() builds a linked list of buffer descriptors for a scatterlist. If dma_pool_alloc() fails while constructing the list, the current code sets buf to NULL and later dereferences it unconditionally at the end of the function: buf->next = NULL; buf->phys_next = 0; This can lead to a null-pointer dereference on allocation failure. If the failure happens after part of the descriptor chain has already been allocated and DMA-mapped, the partially constructed chain also needs to be released. Fix this by terminating the partially constructed chain on allocation failure and letting the callers unwind it via their existing cleanup paths. Also fix ablk_perform() to preserve the hook pointers before checking for failure, so partially built chains can be freed correctly.
Who exploits it and how urgent it is
A 0–100 score combining confirmed exploitation, ransomware and APT use, public exploits, EPSS and severity.
How the score was calculated
- EPSS 0.2% (30-day exploitation probability)+1
The score orders the patch queue; it does not replace your asset context (internet exposure, criticality, compensating controls).
Triage
Is it exploited, how likely is exploitation, what does it touch, and how severe do the sources call it.
Remediation
Fixes and mitigations documented by the sources — linked to the original advisory.
No fix documented by the sources we poll. That does not mean none exists: check the vendor advisory.
First 24 hours
Ordered from the record’s own fields — exposure first, because you cannot patch what you have not found. A rule-generated starting point.
- Identify exposed assets running the affected vendor/product/version combinations (Linux Linux).
- No fix documented in the sources: reduce exposure and monitor the vendor advisory.
- Search available logs for exploit probes, errors and authentication anomalies.
Affected scope
Vendor, product and versions as the sources word them.
| Vendor | Product | Versions | Status | Source |
|---|---|---|---|---|
| Linux | Linux |
≥ 0d44dc59b2b434b29aafeae581d06f81efac7c83 and < d4007867be42d71795b78fa7f8ce7514dda9ca83≥ 0d44dc59b2b434b29aafeae581d06f81efac7c83 and < 4918b0bd7d2baafb45d87dca9e322137c96005c2≥ 0d44dc59b2b434b29aafeae581d06f81efac7c83 and < 8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991≥ 0d44dc59b2b434b29aafeae581d06f81efac7c83 and < 04cb00106ca4d0fa9eca24cadc4eda6036e855c8≥ 0d44dc59b2b434b29aafeae581d06f81efac7c83 and < 028a7f4f3d69e551f6bf9f728d547bbf4cfc707d≥ 0d44dc59b2b434b29aafeae581d06f81efac7c83 and < 25056329384010a8672552b134f609601dc4f80eversion 5a80273150a8a1725fa70418d106eb1f2ee8fd2fversion 82a8becb9c2c52fc5e67057a43aeded1f0731e7b and 5 moreversion 68845515c8b11791b547a2838e22c27dfa3115ee≥ 2.6.27.22 and < 2.6.28≥ 2.6.28.10 and < 2.6.29≥ 2.6.29.3 and < 2.6.30version 2.6.30 |
Vulnerable | CVE Program (cve.org) e CISA ADP |
EPSS over time FIRST
Oct 15, 2026 → Oct 16, 2026 · 2 reading(s) · max 0.16%
Detection
Read off the CVSS vector and the weakness class. Starting points, not tested rules.
- Not enough vector or weakness data: use the affected application’s logs as a starting point.
Timeline
What happened to this CVE, newest first.
- 2026
- Record published
- Affected products added · linux/linux
- Source status changed · → Received
- Record created in this database
- CVE published
Source activity
Repeated readings are counted rather than listed.
- 1× Official description updated · Oct 15, 2026 – Oct 15, 2026
References
6 on the record
- git.kernel.org/stable/c/8c37bc8d6a6f77bf9593fb1bcab6c14c7cf02991
- git.kernel.org/stable/c/028a7f4f3d69e551f6bf9f728d547bbf4cfc707d
- git.kernel.org/stable/c/d4007867be42d71795b78fa7f8ce7514dda9ca83
- git.kernel.org/stable/c/04cb00106ca4d0fa9eca24cadc4eda6036e855c8
- git.kernel.org/stable/c/25056329384010a8672552b134f609601dc4f80e
- git.kernel.org/stable/c/4918b0bd7d2baafb45d87dca9e322137c96005c2
Elsewhere on this site
Related CVEs (same products)
- Critical CVE-2026-99999 ipv4: validate checksum_start before completing checksum 2d
- Unknown CVE-2026-98432 ipv4: free inet_opt and ireq_opt after an RCU grace period 2d
- Unknown CVE-2026-98430 RDMA/efa: Keep admin queues alive while IRQ is registered 3d
- Unknown CVE-2026-98424 wifi: cfg80211: undo netns switch if renaming the wiphy fails 3d
- Unknown CVE-2026-98425 wifi: mac80211: don't warn when an IBSS has no channel to scan 3d
- Unknown CVE-2026-98426 wifi: mwifiex: fix IRQ leak using wrong index in MSI-X error path 3d
Not in any source we poll
Listed rather than left blank: an empty field and an unmeasured one look identical on screen, and only one is a reason to look elsewhere.
- No CVSS score published by NVD, the CNA, CISA or GitHub so far.
- No fixed version, patch or mitigation documented.
- No CISA SSVC assessment.
- No CWE classification.
- No confirmed IOCs, IP addresses, domains, file hashes, or malware artifacts supplied.
- No organization-specific asset inventory, compensating-control status, or patch deployment evidence supplied.
- No exploit packet captures, log samples, or incident case IDs supplied.
Answered from this record
Text assembled only from the fields above — no additional claims.
What should defenders know first?
CVE-2026-97506 is "crypto: ixp4xx - fix buffer chain unwind on allocation failure", rated Unknown. It affects Linux (Linux); versions are in the scope table. It is not in CISA KEV, which does not rule out exploitation. EPSS 0.16% estimates the probability of exploitation in 30 days; neither replaces your asset context. First verify whether exposed or business-critical assets run the affected versions, apply vendor fixes or mitigations, and preserve logs for review.
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