Vulnerability-Lookup

FKIE_CVE-2026-22991

Vulnerability from fkie_nvd - Published: 2026-01-23 16:15 - Updated: 2026-02-26 18:50

Severity ?

5.5 (Medium) - CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

Summary

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.

References

URL	Tags
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/8081faaf089db5280c3be820948469f7c58ef8dd	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/851241d3f78a5505224dc21c03d8692f530256b4	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/9b3730dabcf3764bfe3ff07caf55e641a0b45234	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/e3fe30e57649c551757a02e1cad073c47e1e075e	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/ec1850f663da64842614c86b20fe734be070c2ba	Patch
416baaa9-dc9f-4396-8d5f-8c081fb06d67	https://git.kernel.org/stable/c/f21c3fdb96833aac2f533506899fe38c19cf49d5	Patch

Impacted products

Vendor	Product	Version
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	*
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19
linux	linux_kernel	6.19

JSON

To clipboard

{
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      "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-\u003eargs\nfails, execution jumps to the fail label and free_choose_arg_map() is\ncalled. Since arg_map-\u003esize is updated to a non-zero value before memory\nallocation, free_choose_arg_map() will iterate over arg_map-\u003eargs 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."
    }
  ],
  "id": "CVE-2026-22991",
  "lastModified": "2026-02-26T18:50:48.817",
  "metrics": {
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          "attackVector": "LOCAL",
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          "baseScore": 5.5,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "LOW",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
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        "impactScore": 3.6,
        "source": "nvd@nist.gov",
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  "vulnStatus": "Analyzed",
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}

CVE-2026-22991 (GCVE-0-2026-22991)

Vulnerability from cvelistv5 – Published: 2026-01-23 15:24 – Updated: 2026-02-09 08:36

Title

libceph: make free_choose_arg_map() resilient to partial allocation

Summary

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/9b3730dabcf3764bf…
	https://git.kernel.org/stable/c/851241d3f78a55052…
	https://git.kernel.org/stable/c/ec1850f663da64842…
	https://git.kernel.org/stable/c/8081faaf089db5280…
	https://git.kernel.org/stable/c/c4c2152a858c0ce4d…
	https://git.kernel.org/stable/c/f21c3fdb96833aac2…
	https://git.kernel.org/stable/c/e3fe30e57649c5517…

Impacted products

Vendor

Product

Version

Linux

Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 9b3730dabcf3764bfe3ff07caf55e641a0b45234 (git)
Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 851241d3f78a5505224dc21c03d8692f530256b4 (git)
Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < ec1850f663da64842614c86b20fe734be070c2ba (git)
Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < 8081faaf089db5280c3be820948469f7c58ef8dd (git)
Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < c4c2152a858c0ce4d2bff6ca8c1d5b0ef9f2cbdf (git)
Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < f21c3fdb96833aac2f533506899fe38c19cf49d5 (git)
Affected: 5cf9c4a9959b6273675310d14a834ef14fbca37c , < e3fe30e57649c551757a02e1cad073c47e1e075e (git)

Linux

Affected: 4.13
Unaffected: 0 , < 4.13 (semver)
Unaffected: 5.10.248 , ≤ 5.10.* (semver)
Unaffected: 5.15.198 , ≤ 5.15.* (semver)
Unaffected: 6.1.161 , ≤ 6.1.* (semver)
Unaffected: 6.6.121 , ≤ 6.6.* (semver)
Unaffected: 6.12.66 , ≤ 6.12.* (semver)
Unaffected: 6.18.6 , ≤ 6.18.* (semver)
Unaffected: 6.19 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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Sightings

Author	Source	Type	Date

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

Action not permitted

FKIE_CVE-2026-22991

CVE-2026-22991 (GCVE-0-2026-22991)

Tags

Sightings

Nomenclature