Out-of-bounds read via stale netfs retry pointer
Published Apr 22, 2026 · Updated Apr 22, 2026
Out-of-bounds read in Linux Kernel netfs from 6.12 allows remote attackers to access stale memory during read-request retry handling. In fs/netfs/read_retry.c, the abandonment path uses an uninitialized subreq pointer on its first pass or a pointer to a deleted subrequest on later passes. Exploitation requires user interaction and the unexpected loss of NEED_RETRY state; the published record does not identify the initiating input or protocol.
Summary
What happened
Out-of-bounds read in Linux Kernel netfs from 6.12 allows remote attackers to access stale memory during read-request retry handling. In fs/netfs/read_retry.c, the abandonment path uses an uninitialized subreq pointer on its first pass or a pointer to a deleted subrequest on later passes. Exploitation requires user interaction and the unexpected loss of NEED_RETRY state; the published record does not identify the initiating input or protocol.
The record
- CVE
- CVE-2026-31435
- Published
- Apr 22, 2026
- Updated
- Apr 22, 2026
- Vendor
- The Linux Kernel Organization
- Product
- Linux Kernel
- Classifications
- CWE-125
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Apr 22, 2026CVE publishedPublication date reported by the CVE source.
- Apr 22, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
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- Affected versionversion=6.12
- Affected versionversion=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <3e5fd8f53b575ff2188f82071da19c977ca56c41
- Affected versionversion=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <7e57523490cd2efb52b1ea97f2e0a74c0fb634cd
- Affected versionversion=ee4cdf7ba857a894ad1650d6ab77669cbbfa329e <8f2f2bd128a8d9edbc1e785760da54ada3df69b7
What conditions does exploitation require?
What is affected?
Published CVSS scores
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Attacks
What attackers are doing with it
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Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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