VulnerabilityPublished 8 Dec 2025Updated 30 Oct 2026

CVE-2025-40311: Linux kernel · accel/habanalabs: support mapping cb with vmalloc-backed coherent memory

Affects Linux kernelSource CVE Database V5

Compare

Not known to be exploited · fixed in d1dfe21a332d38a6a09658ec29a55940afb5fe36 : update Linux kernel when convenient.

Data as of 30 Oct 2026, 12:33 UTC

Severity

Unrated

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

Thin evidence

One scorer or none

Patch: Available – fixed in d1dfe21a332d38a6a09658ec29a55940afb5fe36, 513024d5a0e34fd34247043f1876b6138ca52847, 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9 +2

Exploitation evidence

Disclosed: evidence found.
CVE published 8 Dec 2025
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: 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 30 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.
Weaponized: A Metasploit exploit module or Exploit-DB entry exists (Metasploit scanner modules do not count), 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 to a fixed release listed under Affected software.

Affected software

Product	Affected	Fixed in
LinuxLinux	Affected ≥ ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399, < d1dfe21a332d38a6a09658ec29a55940afb5fe36	Fixed in d1dfe21a332d38a6a09658ec29a55940afb5fe36
LinuxLinux	Affected ≥ ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399, < 513024d5a0e34fd34247043f1876b6138ca52847	Fixed in 513024d5a0e34fd34247043f1876b6138ca52847
LinuxLinux	Affected ≥ ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399, < 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9	Fixed in 73c7c2cdb442fc4160d2a2a4bfffbd162af06cb9
LinuxLinux	Affected ≥ ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399, < 8de421db5b1b2b37e9643ea7f6ade90fd756892d	Fixed in 8de421db5b1b2b37e9643ea7f6ade90fd756892d
LinuxLinux	Affected ≥ ac0ae6a96aa58eeba4aed97b12ef1dea8c5bf399, < 7ec8ac9f73d4a9438c2186768d6de27ace37531e	Fixed in 7ec8ac9f73d4a9438c2186768d6de27ace37531e
LinuxLinux	Affected =5.8	Fixed in–

Description

In the Linux kernel, the following vulnerability has been resolved: accel/habanalabs: support mapping cb with vmalloc-backed coherent memory When IOMMU is enabled, dma_alloc_coherent() with GFP_USER may return addresses from the vmalloc range. If such an address is mapped without VM_MIXEDMAP, vm_insert_page() will trigger a BUG_ON due to the VM_PFNMAP restriction. Fix this by checking for vmalloc addresses and setting VM_MIXEDMAP in the VMA before mapping. This ensures safe mapping and avoids kernel crashes. The memory is still driver-allocated and cannot be accessed directly by userspace.

References

Community reviews

Loading reviews…