{"id":"CVE-2022-49803","title":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: Fix memory leak of nsim_dev->fa_cookie\n\nkmemleak reports this issue:\n\nunreferenced object 0xffff8881bac872d0 (size 8):\n  comm \"sh\", pid 58603, jiffies 448152…","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: Fix memory leak of nsim_dev->fa_cookie\n\nkmemleak reports this issue:\n\nunreferenced object 0xffff8881bac872d0 (size 8):\n  comm \"sh\", pid 58603, jiffies 448152…","severity":"medium","cvss":5.5,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-401"],"vendor":"linux","product":"linux_kernel","affected":["linux_kernel >= 5.7, < 6.0.10","linux_kernel = 6.1"],"patched":["linux_kernel 6.0.10"],"published":"2025-05-01","updated":"2026-07-04","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2022-49803","references":[{"url":"https://git.kernel.org/stable/c/064bc7312bd09a48798418663090be0c776183db","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/207edad5717e0a5709ce8467f0eff41c607835c9","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/6d463ddd0107d4188229d996dcdd45c99bad8af7","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"},{"url":"https://git.kernel.org/stable/c/7d79725a7073d86b9185f87718e22f3d65115801","label":"416baaa9-dc9f-4396-8d5f-8c081fb06d67"}],"tags":["nvd"],"epss":0.00195,"epssPercentile":0.09464,"ingestedAt":"2026-07-04T12:56:09.227Z","slug":"CVE-2022-49803","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: Fix memory leak of nsim_dev->fa_cookie\n\nkmemleak reports this issue:\n\nunreferenced object 0xffff8881bac872d0 (size 8):\n  comm \"sh\", pid 58603, jiffies 4481524462 (age 68.065s)\n  hex dump (first 8 bytes):\n    04 00 00 00 de ad be ef                          ........\n  backtrace:\n    [<00000000c80b8577>] __kmalloc+0x49/0x150\n    [<000000005292b8c6>] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim]\n    [<0000000093d78e77>] full_proxy_write+0xf3/0x180\n    [<000000005a662c16>] vfs_write+0x1c5/0xaf0\n    [<000000007aabf84a>] ksys_write+0xed/0x1c0\n    [<000000005f1d2e47>] do_syscall_64+0x3b/0x90\n    [<000000006001c6ec>] entry_SYSCALL_64_after_hwframe+0x63/0xcd\n\nThe issue occurs in the following scenarios:\n\nnsim_dev_trap_fa_cookie_write()\n  kmalloc() fa_cookie\n  nsim_dev->fa_cookie = fa_cookie\n..\nnsim_drv_remove()\n\nThe fa_cookie allocked in nsim_dev_trap_fa_cookie_write() is not freed. To\nfix, add kfree(nsim_dev->fa_cookie) to nsim_drv_remove().\n\n## Affected\n\n- `linux_kernel >= 5.7, < 6.0.10`\n- `linux_kernel = 6.1`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `linux_kernel 6.0.10`","depth":"sunlit","depthScore":30,"depthScoreParts":{"impact":30.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}