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Back to active CVEs
High ยท CVSS 7.8CVE-2026-43258

alpha: fix user-space corruption during memory compactionCVE-2026-43258

Answer in brief

CVE-2026-43258 records a High severity (CVSS 7.8) vulnerability in alpha: fix user-space corruption during memory compaction. The current sources do not mark it as known exploited. The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published May 6, 2026Updated Oct 30, 2026Source checked Nov 4, 2026First seen by HOL Aug 5, 2026Material review Oct 30, 2026
Upstream Advisory

Record context

Vulnerability class
Memory Corruption
EPSS
Not reported
CWE IDs
CWE-787
Source
CVE List V5
Source checked
Nov 4, 2026
References
6 linked sources
Open source record

Key facts

Risk
High ยท CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
12 mapped packages or products
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic), Linux/Linux (generic). Check affected ranges and fixed versions before updating.

Affected products and reported versions
ProductAffected versionsFixed versions
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:2.6.16:-:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:2.6.16:rc2:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:2.6.16:rc3:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:2.6.16:rc4:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:2.6.16:rc5:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:2.6.16:rc6:*:*:*:*:*:*Not reportedNot reported
cpe:2.3:o:linux:linux_kernel:2.6.16:rc7:*:*:*:*:*:*Not reportedNot reported
Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Linux/Linuxgeneric>=a48d07afdf18212de22b959715b16793c5a6e57a <d4ca6ca2c6f5a1d19d9014c5b36d96637846b5d6 || >=a48d07afdf18212de22b959715b16793c5a6e57a <03e42b5f7ad4c2c3db8bd384bab7990d5d53c90f || >=a48d07afdf18212de22b959715b16793c5a6e57a <bab8d762a8dbb816b10011e13b87d1bca91e5f77 || >=a48d07afdf18212de22b959715b16793c5a6e57a <dd5712f3379cfe760267cdd28ff957d9ab4e51c7d4ca6ca2c6f5a1d19d9014c5b36d96637846b5d6, 03e42b5f7ad4c2c3db8bd384bab7990d5d53c90f, bab8d762a8dbb816b10011e13b87d1bca91e5f77, dd5712f3379cfe760267cdd28ff957d9ab4e51c7
Linux/Linuxgeneric2.6.16Not reported
Linux/Linuxgeneric>=a48d07afdf18212de22b959715b16793c5a6e57a <5593c9b255ae73f57a8b5e696a660032acbd67da || >=a48d07afdf18212de22b959715b16793c5a6e57a <d4ca6ca2c6f5a1d19d9014c5b36d96637846b5d6 || >=a48d07afdf18212de22b959715b16793c5a6e57a <03e42b5f7ad4c2c3db8bd384bab7990d5d53c90f || >=a48d07afdf18212de22b959715b16793c5a6e57a <bab8d762a8dbb816b10011e13b87d1bca91e5f77 || >=a48d07afdf18212de22b959715b16793c5a6e57a <dd5712f3379cfe760267cdd28ff957d9ab4e51c75593c9b255ae73f57a8b5e696a660032acbd67da, d4ca6ca2c6f5a1d19d9014c5b36d96637846b5d6, 03e42b5f7ad4c2c3db8bd384bab7990d5d53c90f, bab8d762a8dbb816b10011e13b87d1bca91e5f77, dd5712f3379cfe760267cdd28ff957d9ab4e51c7
Linux/Linuxgeneric>=a48d07afdf18212de22b959715b16793c5a6e57a <01cddfc34bf2a813a2773f1d607305515be55409 || >=a48d07afdf18212de22b959715b16793c5a6e57a <5593c9b255ae73f57a8b5e696a660032acbd67da || >=a48d07afdf18212de22b959715b16793c5a6e57a <d4ca6ca2c6f5a1d19d9014c5b36d96637846b5d6 || >=a48d07afdf18212de22b959715b16793c5a6e57a <03e42b5f7ad4c2c3db8bd384bab7990d5d53c90f || >=a48d07afdf18212de22b959715b16793c5a6e57a <bab8d762a8dbb816b10011e13b87d1bca91e5f77 || >=a48d07afdf18212de22b959715b16793c5a6e57a <dd5712f3379cfe760267cdd28ff957d9ab4e51c701cddfc34bf2a813a2773f1d607305515be55409, 5593c9b255ae73f57a8b5e696a660032acbd67da, d4ca6ca2c6f5a1d19d9014c5b36d96637846b5d6, 03e42b5f7ad4c2c3db8bd384bab7990d5d53c90f, bab8d762a8dbb816b10011e13b87d1bca91e5f77, dd5712f3379cfe760267cdd28ff957d9ab4e51c7

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Linux/Linux, Linux/Linux, Linux/Linux.
  2. 2Review the reported fix. Update Linux/Linux to d4ca6ca2c6f5a1d19d9014c5b36d96637846b5d6; Linux/Linux to 5593c9b255ae73f57a8b5e696a660032acbd67da; Linux/Linux to 01cddfc34bf2a813a2773f1d607305515be55409 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    May 6, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 30, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Aug 5, 2026

Sources and claim methodology

  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
  • Source referencegit.kernel.org
Upstream source description

In the Linux kernel, the following vulnerability has been resolved: alpha: fix user-space corruption during memory compaction Alpha systems can suffer sporadic user-space crashes and heap corruption when memory compaction is enabled. Symptoms include SIGSEGV, glibc allocator failures (e.g. "unaligned tcache chunk"), and compiler internal errors. The failures disappear when compaction is disabled or when using global TLB invalidation. The root cause is insufficient TLB shootdown during page migration. Alpha relies on ASN-based MM context rollover for instruction cache coherency, but this alone is not sufficient to prevent stale data or instruction translations from surviving migration. Fix this by introducing a migration-specific helper that combines: - MM context invalidation (ASN rollover), - immediate per-CPU TLB invalidation (TBI), - synchronous cross-CPU shootdown when required. The helper is used only by migration/compaction paths to avoid changing global TLB semantics. Additionally, update flush_tlb_other(), pte_clear(), to use READ_ONCE()/WRITE_ONCE() for correct SMP memory ordering. This fixes observed crashes on both UP and SMP Alpha systems.

Quoted source text, attributed separately from HOL analysis.

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  • FreeRDP before 3.32.2 Proxy Out-of-Bounds Write via Bitmap Cache v2 CapabilityAlso CWE-787
  • FreeRDP before 3.32.2 Heap Out-of-Bounds Write in Planar CodecAlso CWE-787
  • FreeRDP before 3.32.2 Heap Buffer Overflow via Early User Authorization ReadAlso CWE-787