netdevsim: Fix memory leak of nsim_dev->fa_cookie

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Summary

CVECVE-2022-49803
StatePUBLISHED
AssignerLinux
Source PriorityCVE Program / NVD first with legacy fallback
Published2025-05-01 15:16:03 UTC
Updated2026-07-04 12:16:51 UTC
DescriptionIn the Linux kernel, the following vulnerability has been resolved: netdevsim: Fix memory leak of nsim_dev->fa_cookie kmemleak reports this issue: unreferenced object 0xffff8881bac872d0 (size 8): comm "sh", pid 58603, jiffies 4481524462 (age 68.065s) hex dump (first 8 bytes): 04 00 00 00 de ad be ef ........ backtrace: [<00000000c80b8577>] __kmalloc+0x49/0x150 [<000000005292b8c6>] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim] [<0000000093d78e77>] full_proxy_write+0xf3/0x180 [<000000005a662c16>] vfs_write+0x1c5/0xaf0 [<000000007aabf84a>] ksys_write+0xed/0x1c0 [<000000005f1d2e47>] do_syscall_64+0x3b/0x90 [<000000006001c6ec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd The issue occurs in the following scenarios: nsim_dev_trap_fa_cookie_write() kmalloc() fa_cookie nsim_dev->fa_cookie = fa_cookie .. nsim_drv_remove() The fa_cookie allocked in nsim_dev_trap_fa_cookie_write() is not freed. To fix, add kfree(nsim_dev->fa_cookie) to nsim_drv_remove().

Risk And Classification

Primary CVSS: v3.1 5.5 MEDIUM from [email protected]

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

EPSS: 0.000670000 probability, percentile 0.207680000 (date 2026-06-04)

Problem Types: CWE-401

CVSS v3.1 Breakdown

Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Linux Linux Kernel All All All All
Operating System Linux Linux Kernel 6.1 rc1 All All
Operating System Linux Linux Kernel 6.1 rc2 All All
Operating System Linux Linux Kernel 6.1 rc3 All All
Operating System Linux Linux Kernel 6.1 rc4 All All
Operating System Linux Linux Kernel 6.1 rc5 All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Linux Linux affected d3cbb907ae57fe5da314b51d949b617b538bdeae 7d79725a7073d86b9185f87718e22f3d65115801 git Not specified
CNA Linux Linux affected d3cbb907ae57fe5da314b51d949b617b538bdeae 6d463ddd0107d4188229d996dcdd45c99bad8af7 git Not specified
CNA Linux Linux affected d3cbb907ae57fe5da314b51d949b617b538bdeae 207edad5717e0a5709ce8467f0eff41c607835c9 git Not specified
CNA Linux Linux affected d3cbb907ae57fe5da314b51d949b617b538bdeae 064bc7312bd09a48798418663090be0c776183db git Not specified
CNA Linux Linux affected 5.7 Not specified
CNA Linux Linux unaffected 5.7 semver Not specified
CNA Linux Linux unaffected 5.10.260 5.10.* semver Not specified
CNA Linux Linux unaffected 5.15.209 5.15.* semver Not specified
CNA Linux Linux unaffected 6.0.10 6.0.* semver Not specified
CNA Linux Linux unaffected 6.1 * original_commit_for_fix Not specified

References

ReferenceSourceLinkTags
git.kernel.org/stable/c/6d463ddd0107d4188229d996dcdd45c99bad8af7 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/7d79725a7073d86b9185f87718e22f3d65115801 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org
git.kernel.org/stable/c/207edad5717e0a5709ce8467f0eff41c607835c9 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
git.kernel.org/stable/c/064bc7312bd09a48798418663090be0c776183db 416baaa9-dc9f-4396-8d5f-8c081fb06d67 git.kernel.org Patch
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