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CVE-2022-49803 (GCVE-0-2022-49803)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-07-04 11:50
VLAI
Title
netdevsim: Fix memory leak of nsim_dev->fa_cookie
Summary
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().
Severity
5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: d3cbb907ae57fe5da314b51d949b617b538bdeae , < 7d79725a7073d86b9185f87718e22f3d65115801 (git)
Affected: d3cbb907ae57fe5da314b51d949b617b538bdeae , < 6d463ddd0107d4188229d996dcdd45c99bad8af7 (git)
Affected: d3cbb907ae57fe5da314b51d949b617b538bdeae , < 207edad5717e0a5709ce8467f0eff41c607835c9 (git)
Affected: d3cbb907ae57fe5da314b51d949b617b538bdeae , < 064bc7312bd09a48798418663090be0c776183db (git)
guessed Create a notification for this product.
Linux Linux Affected: 5.7
Unaffected: 0 , < 5.7 (semver)
Unaffected: 5.10.260 , ≤ 5.10.* (semver)
Unaffected: 5.15.209 , ≤ 5.15.* (semver)
Unaffected: 6.0.10 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnetdevsim: Fix memory leak of nsim_dev-\u003efa_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    [\u003c00000000c80b8577\u003e] __kmalloc+0x49/0x150\n    [\u003c000000005292b8c6\u003e] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim]\n    [\u003c0000000093d78e77\u003e] full_proxy_write+0xf3/0x180\n    [\u003c000000005a662c16\u003e] vfs_write+0x1c5/0xaf0\n    [\u003c000000007aabf84a\u003e] ksys_write+0xed/0x1c0\n    [\u003c000000005f1d2e47\u003e] do_syscall_64+0x3b/0x90\n    [\u003c000000006001c6ec\u003e] 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-\u003efa_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-\u003efa_cookie) to nsim_drv_remove()."
        }
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        "dateUpdated": "2026-07-04T11:50:21.645Z",
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          "url": "https://git.kernel.org/stable/c/064bc7312bd09a48798418663090be0c776183db"
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    "assignerShortName": "Linux",
    "cveId": "CVE-2022-49803",
    "datePublished": "2025-05-01T14:09:30.971Z",
    "dateReserved": "2025-05-01T14:05:17.225Z",
    "dateUpdated": "2026-07-04T11:50:21.645Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2022-49803\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2025-05-01T15:16:03.617\",\"lastModified\":\"2026-07-04T12:16:51.650\",\"vulnStatus\":\"Modified\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\nnetdevsim: Fix memory leak of nsim_dev-\u003efa_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    [\u003c00000000c80b8577\u003e] __kmalloc+0x49/0x150\\n    [\u003c000000005292b8c6\u003e] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim]\\n    [\u003c0000000093d78e77\u003e] full_proxy_write+0xf3/0x180\\n    [\u003c000000005a662c16\u003e] vfs_write+0x1c5/0xaf0\\n    [\u003c000000007aabf84a\u003e] ksys_write+0xed/0x1c0\\n    [\u003c000000005f1d2e47\u003e] do_syscall_64+0x3b/0x90\\n    [\u003c000000006001c6ec\u003e] 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-\u003efa_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-\u003efa_cookie) to nsim_drv_remove().\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: netdevsim: Se corrige la p\u00e9rdida de memoria de nsim_dev-\u0026gt;fa_cookie. kmemleak informa de este problema: objeto sin referencia 0xffff8881bac872d0 (tama\u00f1o 8): comm \\\"sh\\\", pid 58603, jiffies 4481524462 (edad 68,065 s) volcado hexadecimal (primeros 8 bytes): 04 00 00 00 de ad be ef ........ backtrace: [\u0026lt;00000000c80b8577\u0026gt;] __kmalloc+0x49/0x150 [\u0026lt;000000005292b8c6\u0026gt;] nsim_dev_trap_fa_cookie_write+0xc1/0x210 [netdevsim] [\u0026lt;0000000093d78e77\u0026gt;] escritura de proxy completo+0xf3/0x180 [\u0026lt;000000005a662c16\u0026gt;] escritura de vfs+0x1c5/0xaf0 [\u0026lt;000000007aabf84a\u0026gt;] escritura de ksys+0xed/0x1c0 [\u0026lt;000000005f1d2e47\u0026gt;] llamada al sistema_64+0x3b/0x90 [\u0026lt;000000006001c6ec\u0026gt;] entrada_SYSCALL_64_after_hwframe+0x63/0xcd El problema ocurre en los siguientes escenarios: nsim_dev_trap_fa_cookie_write() kmalloc() fa_cookie nsim_dev-\u0026gt;fa_cookie = fa_cookie .. nsim_drv_remove(): La fa_cookie bloqueada en nsim_dev_trap_fa_cookie_write() no se libera. 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    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-06-29T21:18:05+00:00",
      "cve": "CVE-2022-49803",
      "id": "CVE-2022-49803",
      "initial_release_date": "2022-01-01T00:00:00+00:00",
      "product_status:known_affected": "156",
      "product_status:known_not_affected": "118",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "kernel: netdevsim: Fix memory leak of nsim_dev-\u003efa_cookie",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2022/cve-2022-49803.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-02T02:02:48Z",
      "cve": "CVE-2022-49803",
      "id": "CVE-2022-49803",
      "initial_release_date": "2025-05-07T02:20:11Z",
      "product_status:known_affected": "171",
      "product_status:known_not_affected": "334",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2022-49803",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2022-49803.json",
      "version": "10"
    }
  }
}



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