ALSA-2026:21556 (CVE-2025-38653)
Vulnerability from osv_almalinux – Published: 2026-05-28 00:00 – Updated: 2026-10-26 00:27 – Source website
VLAI
Summary
Important: kernel security update
Details
The kernel packages contain the Linux kernel, the core of any Linux operating system.
Security Fix(es):
- kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al (CVE-2025-38653)
- kernel: ima: don't clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)
- kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)
- kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)
- kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)
- kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)
- kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)
- kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408)
- kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)
- kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)
- kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)
- kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)
- kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)
- kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)
- kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)
- kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)
- kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)
- kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)
- kernel: mm/page_alloc: clear page->private in free_pages_prepare() (CVE-2026-43303)
For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.
References
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"details": "The kernel packages contain the Linux kernel, the core of any Linux operating system. \n\nSecurity Fix(es): \n\n * kernel: proc: use the same treatment to check proc_lseek as ones for proc_read_iter et.al (CVE-2025-38653)\n * kernel: ima: don\u0027t clear IMA_DIGSIG flag when setting or removing non-IMA xattr (CVE-2025-68183)\n * kernel: nbd: defer config unlock in nbd_genl_connect (CVE-2025-68366)\n * kernel: crypto: asymmetric_keys - prevent overflow in asymmetric_key_generate_id (CVE-2025-68724)\n * kernel: iommu: disable SVA when CONFIG_X86 is set (CVE-2025-71089)\n * kernel: netfilter: nf_tables: release flowtable after rcu grace period on error (CVE-2026-23392)\n * kernel: netfilter: nf_conntrack_h323: check for zero length in DecodeQ931() (CVE-2026-23455)\n * kernel: Bluetooth: SCO: Fix use-after-free in sco_recv_frame() due to missing sock_hold (CVE-2026-31408)\n * kernel: net: sched: act_csum: validate nested VLAN headers (CVE-2026-31684)\n * kernel: netfilter: ip6t_eui64: reject invalid MAC header for all packets (CVE-2026-31685)\n * kernel: netfilter: nf_conntrack_helper: pass helper to expect cleanup (CVE-2026-43027)\n * kernel: Bluetooth: MGMT: validate LTK enc_size on load (CVE-2026-43020)\n * kernel: HID: wacom: fix out-of-bounds read in wacom_intuos_bt_irq (CVE-2026-43051)\n * kernel: smb: client: validate the whole DACL before rewriting it in cifsacl (CVE-2026-31709)\n * kernel: Bluetooth: SCO: fix race conditions in sco_sock_connect() (CVE-2026-43023)\n * kernel: wifi: brcmfmac: validate bsscfg indices in IF events (CVE-2026-43110)\n * kernel: netfilter: xt_tcpmss: check remaining length before reading optlen (CVE-2026-43190)\n * kernel: xfs: fix freemap adjustments when adding xattrs to leaf blocks (CVE-2026-43158)\n * kernel: mm/page_alloc: clear page-\u003eprivate in free_pages_prepare() (CVE-2026-43303)\n\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n",
"id": "ALSA-2026:21556",
"modified": "2026-10-26T00:27:29Z",
"published": "2026-05-28T00:00:00Z",
"references": [
{
"type": "ADVISORY",
"url": "https://access.redhat.com/errata/RHSA-2026:21556"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-38653"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-68183"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-68366"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-68724"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2025-71089"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-23392"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-23455"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-31408"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-31684"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-31685"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-31709"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43020"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43023"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43027"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43051"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43110"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43158"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43190"
},
{
"type": "REPORT",
"url": "https://access.redhat.com/security/cve/CVE-2026-43303"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2390372"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2422699"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2424881"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2424886"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2429104"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2451218"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2454810"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2455334"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2461757"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2461759"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2464369"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2464455"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2464462"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2464476"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2464496"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2467014"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2467064"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2467210"
},
{
"type": "REPORT",
"url": "https://bugzilla.redhat.com/2468091"
},
{
"type": "ADVISORY",
"url": "https://errata.almalinux.org/9/ALSA-2026-21556.html"
},
{
"type": "REPORT",
"url": "https://www.redhat.com/security/data/cve/CVE-2026-46195.html"
}
],
"related": [
"CVE-2025-38653",
"CVE-2025-68183",
"CVE-2025-68366",
"CVE-2025-68724",
"CVE-2025-71089",
"CVE-2026-23392",
"CVE-2026-23455",
"CVE-2026-31408",
"CVE-2026-31684",
"CVE-2026-31685",
"CVE-2026-31709",
"CVE-2026-43020",
"CVE-2026-43023",
"CVE-2026-43027",
"CVE-2026-43051",
"CVE-2026-43110",
"CVE-2026-43158",
"CVE-2026-43190",
"CVE-2026-43303",
"CVE-2026-46195"
],
"schema_version": "1.7.0",
"summary": "Important: kernel security update",
"upstream": [
"CVE-2025-38653",
"CVE-2025-68183",
"CVE-2025-68366",
"CVE-2025-68724",
"CVE-2025-71089",
"CVE-2026-23392",
"CVE-2026-23455",
"CVE-2026-31408",
"CVE-2026-31684",
"CVE-2026-31685",
"CVE-2026-31709",
"CVE-2026-43020",
"CVE-2026-43023",
"CVE-2026-43027",
"CVE-2026-43051",
"CVE-2026-43110",
"CVE-2026-43158",
"CVE-2026-43190",
"CVE-2026-43303",
"CVE-2026-46195"
]
}
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Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
How durations are calculated
Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.
Each result shows its source dates. A negative interval means the end event came first; when date-only inputs leave the order open, the result says so. Date-only inputs are approximate. The earliest evidence wins: KEV report dates and sightings are labelled as such. Records describing another vulnerability are listed but never calculated from, and a PoC alone does not establish exploitation. Missing patch evidence does not prove that no patch exists. Filters below change the event list only.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.