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nvd416baaa9-dc9f-4396-8d5f-8c081fb06d67NVD:CVE-2024-40909
HistoryJul 12, 2024 - 1:15 p.m.

CVE-2024-40909

2024-07-1213:15:14
CWE-416
416baaa9-dc9f-4396-8d5f-8c081fb06d67
web.nvd.nist.gov
3
linux kernel
use-after-free
bpf_link_free

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0

Percentile

5.1%

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

bpf: Fix a potential use-after-free in bpf_link_free()

After commit 1a80dbcb2dba, bpf_link can be freed by
link->ops->dealloc_deferred, but the code still tests and uses
link->ops->dealloc afterward, which leads to a use-after-free as
reported by syzbot. Actually, one of them should be sufficient, so
just call one of them instead of both. Also add a WARN_ON() in case
of any problematic implementation.

Affected configurations

Nvd
Node
linuxlinux_kernelRange6.6.266.6.35
OR
linuxlinux_kernelRange6.96.9.6
OR
linuxlinux_kernelMatch6.10rc1
OR
linuxlinux_kernelMatch6.10rc2
VendorProductVersionCPE
linuxlinux_kernel*cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc1:*:*:*:*:*:*
linuxlinux_kernel6.10cpe:2.3:o:linux:linux_kernel:6.10:rc2:*:*:*:*:*:*

CVSS3

7.8

Attack Vector

LOCAL

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality Impact

HIGH

Integrity Impact

HIGH

Availability Impact

HIGH

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

EPSS

0

Percentile

5.1%