CVE-2022-48648

In the Linux kernel, the following vulnerability has been resolved: sfc: fix null pointer dereference in efx_hard_start_xmit Trying to get the channel from the tx_queue variable here is wrong because we can only be here if tx_queue is NULL, so we shouldn't dereference it. As the above comment in the code says, this is very unlikely to happen, but it's wrong anyway so let's fix it. I hit this issue because of a different bug that caused tx_queue to be NULL. If that happens, this is the error message that we get here: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/0a242eb2913a4aa3d6fbdb86559f27628e9466f3	Patch
https://git.kernel.org/stable/c/8547c7bfc0617e7184e4da65b9b96681fcfe9998	Patch
https://git.kernel.org/stable/c/b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7	Patch
https://git.kernel.org/stable/c/b3b952168ee1f220ba729fa100fd9d5aa752eb03	Patch
https://git.kernel.org/stable/c/0a242eb2913a4aa3d6fbdb86559f27628e9466f3	Patch
https://git.kernel.org/stable/c/8547c7bfc0617e7184e4da65b9b96681fcfe9998	Patch
https://git.kernel.org/stable/c/b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7	Patch
https://git.kernel.org/stable/c/b3b952168ee1f220ba729fa100fd9d5aa752eb03	Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.0:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.0:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.0:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.0:rc4::::::
	cpe:2.3:o:linux:linux_kernel:6.0:rc5::::::
	cpe:2.3:o:linux:linux_kernel:6.0:rc6::::::

History

No history.

Information

Published : 2024-04-28 13:15

Updated : 2025-01-14 14:52

NVD link : CVE-2022-48648

Mitre link : CVE-2022-48648

CVE.ORG link : CVE-2022-48648

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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As the above comment in the code says, this is very\nunlikely to happen, but it's wrong anyway so let's fix it.\n\nI hit this issue because of a different bug that caused tx_queue to be\nNULL. If that happens, this is the error message that we get here:\n BUG: unable to handle kernel NULL pointer dereference at 0000000000000020\n [...]\n RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]"}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: sfc: corrige la desreferencia del puntero nulo en efx_hard_start_xmit Intentar obtener el canal de la variable tx_queue aqu\u00ed es incorrecto porque solo podemos estar aqu\u00ed si tx_queue es NULL, por lo que no debemos desreferenciarlo. Como dice el comentario anterior en el c\u00f3digo, es muy poco probable que esto suceda, pero de todos modos est\u00e1 mal, as\u00ed que solucion\u00e9moslo. Encontr\u00e9 este problema debido a un error diferente que provoc\u00f3 que tx_queue fuera NULL. Si eso sucede, este es el mensaje de error que recibimos aqu\u00ed: ERROR: no se puede manejar la desreferencia del puntero NULL del kernel en 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]"}], "lastModified": "2025-01-14T14:52:07.293", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "26BCCE2C-EE0C-437D-A9D6-6714B5AE47CC", "versionEndExcluding": "5.10.146", "versionStartIncluding": "5.10"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "080C1827-D257-4D5A-9071-779EF7F5EF0B", "versionEndExcluding": "5.15.71", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "03B0F56B-C5CC-4E81-BB51-D07D569DE4CA", "versionEndExcluding": "5.19.12", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E8BD11A3-8643-49B6-BADE-5029A0117325"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "5F0AD220-F6A9-4012-8636-155F1B841FAD"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "A46498B3-78E1-4623-AAE1-94D29A42BE4E"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F8446E87-F5F6-41CA-8201-BAE0F0CA6DD9"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc5:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "8E5FB72F-67CE-43CC-83FE-541604D98182"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.0:rc6:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "3A0A7397-F5F8-4753-82DC-9A11288E696D"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}