CVE-2022-49076

RDMA/hfi1: Fix use-after-free bug for mm struct

State: Published
Severity: 7.8 High
Published: Feb 26, 2025
Updated: Aug 5, 2026
Reserved: Feb 26, 2025

Description

In the Linux kernel, the following vulnerability has been resolved:

RDMA/hfi1: Fix use-after-free bug for mm struct

Under certain conditions, such as MPI_Abort, the hfi1 cleanup code may represent the last reference held on the task mm. hfi1_mmu_rb_unregister() then drops the last reference and the mm is freed before the final use in hfi1_release_user_pages(). A new task may allocate the mm structure while it is still being used, resulting in problems. One manifestation is corruption of the mmap_sem counter leading to a hang in down_write(). Another is corruption of an mm struct that is in use by another task.

Scores

CVSS	Score	Vector	Source
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	Linux
3.1	7.8 High	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
LinuxLinux	3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 5f54364ff6cfcd14cddf5441c4a490bb28dd69f7Affected 3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 9ca11bd8222a612de0d2f54d050bfcf61ae2883fAffected 3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 0b7186d657ee55e2cdefae498f07d5c1961e8023Affected 3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 5a9a1b24ddb510715f8f621263938186579a965cAffected 3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 2bbac98d0930e8161b1957dc0ec99de39ade1b3cAffected 5732f83596f8a573f2cde814cc76a54e1a8995c7Affected 5.9.12 to before 5.10Affected
LinuxLinux	5.10Affected before 5.10Not affected 5.10.111 through 5.10.Not affected 5.15.34 through 5.15.Not affected 5.16.20 through 5.16.Not affected 5.17.3 through 5.17.Not affected 5.18 and laterNot affected

Product

Versions

LinuxLinux

3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 5f54364ff6cfcd14cddf5441c4a490bb28dd69f7Affected
3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 9ca11bd8222a612de0d2f54d050bfcf61ae2883fAffected
3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 0b7186d657ee55e2cdefae498f07d5c1961e8023Affected
3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 5a9a1b24ddb510715f8f621263938186579a965cAffected
3d2a9d642512c21a12d19b9250e7a835dcb41a79 to before 2bbac98d0930e8161b1957dc0ec99de39ade1b3cAffected
5732f83596f8a573f2cde814cc76a54e1a8995c7Affected
5.9.12 to before 5.10Affected

LinuxLinux

5.10Affected
before 5.10Not affected
5.10.111 through 5.10.*Not affected
5.15.34 through 5.15.*Not affected
5.16.20 through 5.16.*Not affected
5.17.3 through 5.17.*Not affected
5.18 and laterNot affected

References

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