CVE-2026-22991

In the Linux kernel, the following vulnerability has been resolved: libceph: make free_choose_arg_map() resilient to partial allocation free_choose_arg_map() may dereference a NULL pointer if its caller fails after a partial allocation. For example, in decode_choose_args(), if allocation of arg_map->args fails, execution jumps to the fail label and free_choose_arg_map() is called. Since arg_map->size is updated to a non-zero value before memory allocation, free_choose_arg_map() will iterate over arg_map->args and dereference a NULL pointer. To prevent this potential NULL pointer dereference and make free_choose_arg_map() more resilient, add checks for pointers before iterating.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd	Patch
https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4	Patch
https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234	Patch
https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf	Patch
https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e	Patch
https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba	Patch
https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5	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::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel::::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc1::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc2::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc3::::::
	cpe:2.3:o:linux:linux_kernel:6.19:rc4::::::

History

No history.

Information

Published : 2026-01-23 16:15

Updated : 2026-06-17 10:20

NVD link : CVE-2026-22991

Mitre link : CVE-2026-22991

CVE.ORG link : CVE-2026-22991

JSON object : View

Products Affected

linux

linux_kernel

CWE

CWE-476

NULL Pointer Dereference

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"nvd@nist.gov", "description": [{"lang": "en", "value": "CWE-476"}]}], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nlibceph: make free_choose_arg_map() resilient to partial allocation\n\nfree_choose_arg_map() may dereference a NULL pointer if its caller fails\nafter a partial allocation.\n\nFor example, in decode_choose_args(), if allocation of arg_map->args\nfails, execution jumps to the fail label and free_choose_arg_map() is\ncalled. Since arg_map->size is updated to a non-zero value before memory\nallocation, free_choose_arg_map() will iterate over arg_map->args and\ndereference a NULL pointer.\n\nTo prevent this potential NULL pointer dereference and make\nfree_choose_arg_map() more resilient, add checks for pointers before\niterating."}, {"lang": "es", "value": "En el kernel de Linux, la siguiente vulnerabilidad ha sido resuelta:\n\nlibceph: hacer free_choose_arg_map() resistente a la asignaci\u00f3n parcial\n\nfree_choose_arg_map() puede desreferenciar un puntero NULL si su llamador falla despu\u00e9s de una asignaci\u00f3n parcial.\n\nPor ejemplo, en decode_choose_args(), si la asignaci\u00f3n de arg_map->args falla, la ejecuci\u00f3n salta a la etiqueta fail y se llama a free_choose_arg_map(). Dado que arg_map->size se actualiza a un valor distinto de cero antes de la asignaci\u00f3n de memoria, free_choose_arg_map() iterar\u00e1 sobre arg_map->args y desreferenciar\u00e1 un puntero NULL.\n\nPara evitar esta potencial desreferencia de puntero NULL y hacer free_choose_arg_map() m\u00e1s resistente, a\u00f1adir comprobaciones para los punteros antes de iterar."}], "lastModified": "2026-06-17T10:20:39.907", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "14DEF845-E647-4A78-9311-A8F1A59E3A66", "versionEndExcluding": "5.10.248", "versionStartIncluding": "4.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "82159CAA-B6BA-43C6-85D8-65BDBC175A7E", "versionEndExcluding": "5.15.198", "versionStartIncluding": "5.11"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "E135B7E2-61FC-4DC1-8570-ABD67894FFDE", "versionEndExcluding": "6.1.161", "versionStartIncluding": "5.16"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "BB7A164B-7422-4A1C-82FB-5FCAEE53C06C", "versionEndExcluding": "6.6.121", "versionStartIncluding": "6.2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F72B884C-B44F-40E4-9895-CE421AC663D0", "versionEndExcluding": "6.12.66", "versionStartIncluding": "6.7"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "879529BC-5B4C-4EBE-BF1D-1A31404A8B2E", "versionEndExcluding": "6.18.6", "versionStartIncluding": "6.13"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc1:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "17B67AA7-40D6-4AFA-8459-F200F3D7CFD1"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc2:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "C47E4CC9-C826-4FA9-B014-7FE3D9B318B2"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc3:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "F71D92C0-C023-48BD-B3B6-70B638EEE298"}, {"criteria": "cpe:2.3:o:linux:linux_kernel:6.19:rc4:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "13580667-0A98-40CC-B29F-D12790B91BDB"}], "operator": "OR"}]}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"}