VulnerabilityPublished 27 May 2026Updated 21 Oct 2026

CVE-2025-71306: Linux kernel · ima: Fix stack-out-of-bounds in is_bprm_creds_for_exec()

Affects Linux kernelSource CVE Database V5

Not known to be exploited · fixed in ab3d16da982a4ebb715d487dbf9dd66e3990d935 : update Linux kernel when convenient.

Data as of 26 Oct 2026, 14:18 UTC

Severity

Unrated

Rated by Threat Radar · No CVSS score from NVD or the CNA

EPSS: 0.1% chance of exploitation in 30 days – higher than 7% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch: Available – fixed in ab3d16da982a4ebb715d487dbf9dd66e3990d935, 377cae9851e8559e9d8b82a78c1ac0abeb18839c, 0f39d936a34933ebfbdc13a04f0aba814d3b9709

Exploitation evidence

Disclosed: evidence found.
CVE published 27 May 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Upgrade Linux kernel to ab3d16da982a4ebb715d487dbf9dd66e3990d935, 377cae9851e8559e9d8b82a78c1ac0abeb18839c or 0f39d936a34933ebfbdc13a04f0aba814d3b9709.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ 95b3cdafd7cb74414070893445a9b731793f7b55, < ab3d16da982a4ebb715d487dbf9dd66e3990d935	Fixed in ab3d16da982a4ebb715d487dbf9dd66e3990d935
LinuxLinux	Affected ≥ 95b3cdafd7cb74414070893445a9b731793f7b55, < 377cae9851e8559e9d8b82a78c1ac0abeb18839c	Fixed in 377cae9851e8559e9d8b82a78c1ac0abeb18839c
LinuxLinux	Affected ≥ 95b3cdafd7cb74414070893445a9b731793f7b55, < 0f39d936a34933ebfbdc13a04f0aba814d3b9709	Fixed in 0f39d936a34933ebfbdc13a04f0aba814d3b9709
LinuxLinux	Affected =6.14	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: ima: Fix stack-out-of-bounds in is_bprm_creds_for_exec() KASAN reported a stack-out-of-bounds access in ima_appraise_measurement from is_bprm_creds_for_exec: BUG: KASAN: stack-out-of-bounds in ima_appraise_measurement+0x12dc/0x16a0 Read of size 1 at addr ffffc9000160f940 by task sudo/550 The buggy address belongs to stack of task sudo/550 and is located at offset 24 in frame: ima_appraise_measurement+0x0/0x16a0 This frame has 2 objects: [48, 56) 'file' [80, 148) 'hash' This is caused by using container_of on the *file pointer. This offset calculation is what triggers the stack-out-of-bounds error. In order to fix this, pass in a bprm_is_check boolean which can be set depending on how process_measurement is called. If the caller has a linux_binprm pointer and the function is BPRM_CHECK we can determine is_check and set it then. Otherwise set it to false.

References

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