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Review reviewHigh

CVE-2025-37761

Linux Linux, linux kernel

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Fix an out-of-bounds shift when invalidating TLB When the size of the range invalidated is larger than rounddown_pow_of_two(ULONG_MAX), The function macro roundup_pow_of_two(length) will hit an out-of-bounds shift [1]. Use a full TLB invalidation for such cases. v2: - Use a define for the range size limit over which we use a full TLB invalidation. (Lucas) - Use a better calculation of the limit. [1]: [ 39.202421] ------------[ cut here ]------------ [ 39.202657] UBSAN: shift-out-of-bounds in ./include/linux/log2.h:5...

CVSS
7.1
EPSS
0.20%
9.80% percentile
CISA KEV
Not listed
Published
2025.05.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.20%
Technical severityCVSS 7.1

Vulnerability overview

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Fix an out-of-bounds shift when invalidating TLB When the size of the range invalidated is larger than rounddown_pow_of_two(ULONG_MAX), The function macro roundup_pow_of_two(length) will hit an out-of-bounds shift [1]. Use a full TLB invalidation for such cases. v2: - Use a define for the range size limit over which we use a full TLB invalidation. (Lucas) - Use a better calculation of the limit. [1]: [ 39.202421] ------------[ cut here ]------------ [ 39.202657] UBSAN: shift-out-of-bounds in ./include/linux/log2.h:5...

Affected product and versions

Product
Linux Linux, linux kernel
Affected versions
>= 332dd0116c82a75df175a459fa69dda3f23491a7 < 28477f701b63922ff88e9fb13f5519c11cd48b86, >= 332dd0116c82a75df175a459fa69dda3f23491a7 < e4715858f87b78ce58cfa03bbe140321edbbaf20, >= 332dd0116c82a75df175a459fa69dda3f23491a7 < 7bcfeddb36b77f9fe3b010bb0b282b7618420bba, >= 6.8 < 6.12.25, >= 6.13 < 6.14.4, 6.15
Fixed versions
6.12.25, 6.14.4

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Linux Linux, linux kernel and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CWE
CWE-125