CVE-2022-49803

netdevsim: Fix memory leak of nsim_dev->fa_cookie

CVE-2022-49803 is fixed in linux on 1 platform, first by DEBIAN-CVE-2022-49803, released May 1, 2025. It is not reported as exploited. Patch Radar priority: Routine.

Routine

CVSS

5.5

Moderate

Exploitation

None reported

No vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0020

10th percentile

In 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().

Where it's fixed

Product	Fixed in	Fix	Released
Linux
linux · Debian 12.15 (bookworm)	6.0.10-1	DEBIAN-CVE-2022-49803	May 1, 2025
linux · Debian 13.5 (trixie)	6.0.10-1	DEBIAN-CVE-2022-49803	May 1, 2025
linux · Debian 14	6.0.10-1	DEBIAN-CVE-2022-49803	May 1, 2025

Details

Published
May 1, 2025
Weakness
Missing Release of Memory after Effective Lifetime
CVSS vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2022-49803

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