cve-2024-26785
Vulnerability from cvelistv5
Published
2024-04-04 08:20
Modified
2024-11-07 18:54
Severity ?
5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
Summary
iommufd: Fix protection fault in iommufd_test_syz_conv_iova
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/cf7c2789822db8b5efa34f5ebcf1621bc0008d48
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fc719ecbca45c9c046640d72baddba3d83e0bc0b
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/fd4d5cd7a2e8f08357c9bfc0905957cffe8ce568
Impacted products
LinuxLinux
LinuxLinux
Show details on NVD website

To clipboard 

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          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\niommufd: Fix protection fault in iommufd_test_syz_conv_iova\n\nSyzkaller reported the following bug:\n\n  general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN\n  KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]\n  Call Trace:\n   lock_acquire\n   lock_acquire+0x1ce/0x4f0\n   down_read+0x93/0x4a0\n   iommufd_test_syz_conv_iova+0x56/0x1f0\n   iommufd_test_access_rw.isra.0+0x2ec/0x390\n   iommufd_test+0x1058/0x1e30\n   iommufd_fops_ioctl+0x381/0x510\n   vfs_ioctl\n   __do_sys_ioctl\n   __se_sys_ioctl\n   __x64_sys_ioctl+0x170/0x1e0\n   do_syscall_x64\n   do_syscall_64+0x71/0x140\n\nThis is because the new iommufd_access_change_ioas() sets access-\u003eioas to\nNULL during its process, so the lock might be gone in a concurrent racing\ncontext.\n\nFix this by doing the same access-\u003eioas sanity as iommufd_access_rw() and\niommufd_access_pin_pages() functions do."
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    "dateReserved": "2024-02-19T14:20:24.178Z",
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    "nvd": "{\"cve\":{\"id\":\"CVE-2024-26785\",\"sourceIdentifier\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\",\"published\":\"2024-04-04T09:15:08.187\",\"lastModified\":\"2024-11-07T19:35:06.440\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"In the Linux kernel, the following vulnerability has been resolved:\\n\\niommufd: Fix protection fault in iommufd_test_syz_conv_iova\\n\\nSyzkaller reported the following bug:\\n\\n  general protection fault, probably for non-canonical address 0xdffffc0000000038: 0000 [#1] SMP KASAN\\n  KASAN: null-ptr-deref in range [0x00000000000001c0-0x00000000000001c7]\\n  Call Trace:\\n   lock_acquire\\n   lock_acquire+0x1ce/0x4f0\\n   down_read+0x93/0x4a0\\n   iommufd_test_syz_conv_iova+0x56/0x1f0\\n   iommufd_test_access_rw.isra.0+0x2ec/0x390\\n   iommufd_test+0x1058/0x1e30\\n   iommufd_fops_ioctl+0x381/0x510\\n   vfs_ioctl\\n   __do_sys_ioctl\\n   __se_sys_ioctl\\n   __x64_sys_ioctl+0x170/0x1e0\\n   do_syscall_x64\\n   do_syscall_64+0x71/0x140\\n\\nThis is because the new iommufd_access_change_ioas() sets access-\u003eioas to\\nNULL during its process, so the lock might be gone in a concurrent racing\\ncontext.\\n\\nFix this by doing the same access-\u003eioas sanity as iommufd_access_rw() and\\niommufd_access_pin_pages() functions do.\"},{\"lang\":\"es\",\"value\":\"En el kernel de Linux, se resolvi\u00f3 la siguiente vulnerabilidad: iommufd: Se corrigi\u00f3 falla de protecci\u00f3n en iommufd_test_syz_conv_iova Syzkaller inform\u00f3 el siguiente error: falla de protecci\u00f3n general, probablemente para direcci\u00f3n no can\u00f3nica 0xdffffc0000000038: 0000 [#1] SMP KASAN KASAN: null-ptr- deref en el rango [0x00000000000001c0-0x00000000000001c7] Seguimiento de llamadas: lock_acquire lock_acquire+0x1ce/0x4f0 down_read+0x93/0x4a0 iommufd_test_syz_conv_iova+0x56/0x1f0 iommufd_test_access_rw.isra. 0+0x2ec/0x390 iommufd_test+0x1058/0x1e30 iommufd_fops_ioctl+0x381/0x510 vfs_ioctl __do_sys_ioctl __se_sys_ioctl __x64_sys_ioctl +0x170/0x1e0 do_syscall_x64 do_syscall_64+0x71/0x140 Esto se debe a que el nuevo iommufd_access_change_ioas() establece access-\u0026gt;ioas en NULL durante su proceso, por lo que el bloqueo podr\u00eda desaparecer en un contexto de ejecuci\u00f3n concurrente. Solucione este problema haciendo el mismo acceso-\u0026gt;ioas cordura que hacen las funciones iommufd_access_rw() y iommufd_access_pin_pages().\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H\",\"attackVector\":\"LOCAL\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"NONE\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"HIGH\",\"baseScore\":5.5,\"baseSeverity\":\"MEDIUM\"},\"exploitabilityScore\":1.8,\"impactScore\":3.6}]},\"weaknesses\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-120\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/stable/c/cf7c2789822db8b5efa34f5ebcf1621bc0008d48\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fc719ecbca45c9c046640d72baddba3d83e0bc0b\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"},{\"url\":\"https://git.kernel.org/stable/c/fd4d5cd7a2e8f08357c9bfc0905957cffe8ce568\",\"source\":\"416baaa9-dc9f-4396-8d5f-8c081fb06d67\"}]}}"
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