Vulnerability-Lookup

SUSE-SU-2026:0688-1

Vulnerability from csaf_suse - Published: 2026-02-27 15:09 - Updated: 2026-02-27 15:09

Summary

Security update for the Linux Kernel

Severity

Important

Notes

Title of the patch: Security update for the Linux Kernel

Description of the patch: The SUSE Linux Enterprise 11 SP4 kernel was updated to fix various security issues The following security issues were fixed: - CVE-2021-0920: net: split out functions related to registering inflight socket files (bsc#1193731). - CVE-2025-38177: sch_hfsc: make hfsc_qlen_notify() idempotent (bsc#1245986).

Patchnames: SUSE-2026-688,SUSE-SLE-SERVER-11-SP4-LTSS-EXTREME-CORE-2026-688

CVE-2021-0920

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

CVE-2025-38177

7 (High)


                        
                          CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Vendor Fix To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or "zypper patch".

References

URL

Category

	https://www.suse.com/support/security/rating/	external
	https://ftp.suse.com/pub/projects/security/csaf/s…	self
	https://www.suse.com/support/update/announcement/…	self
	https://lists.suse.com/pipermail/sle-security-upd…	self
	https://bugzilla.suse.com/1193731	self
	https://bugzilla.suse.com/1245986	self
	https://www.suse.com/security/cve/CVE-2021-0920/	self
	https://www.suse.com/security/cve/CVE-2025-38177/	self
	https://www.suse.com/security/cve/CVE-2021-0920	external
	https://bugzilla.suse.com/1193731	external
	https://bugzilla.suse.com/1194463	external
	https://bugzilla.suse.com/1195939	external
	https://bugzilla.suse.com/1199255	external
	https://bugzilla.suse.com/1200084	external
	https://www.suse.com/security/cve/CVE-2025-38177	external
	https://bugzilla.suse.com/1237312	external
	https://bugzilla.suse.com/1245986	external
	https://bugzilla.suse.com/1246356	external
	https://bugzilla.suse.com/1247374	external

JSON

To clipboard

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          "category": "general",
          "text": "In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel",
          "title": "CVE description"
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          ]
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      ],
      "scores": [
        {
          "cvss_v3": {
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
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          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "date": "2026-02-27T15:09:04Z",
          "details": "important"
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    },
    {
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      "ids": [
        {
          "system_name": "SUSE CVE Page",
          "text": "https://www.suse.com/security/cve/CVE-2025-38177"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let\u0027s make it idempotent\nto ease qdisc_tree_reduce_backlog() callers\u0027 life:\n\n1. update_vf() decreases cl-\u003ecl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl-\u003eel_node, but we can use\n   RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.",
          "title": "CVE description"
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          "category": "external",
          "summary": "CVE-2025-38177",
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  ]
}

CVE-2021-0920 (GCVE-0-2021-0920)

Vulnerability from cvelistv5 – Published: 2021-12-15 18:05 – Updated: 2025-10-21 23:15

Summary

In unix_scm_to_skb of af_unix.c, there is a possible use after free bug due to a race condition. This could lead to local escalation of privilege with System execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-196926917References: Upstream kernel

Severity ?

6.4 (Medium)


                        
                          CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE

Elevation of privilege

Assigner

google_android

References

URL

	Vendor	Product	Version
	n/a	Android	Affected: Android kernel

CVE-2025-38177 (GCVE-0-2025-38177)

Vulnerability from cvelistv5 – Published: 2025-07-04 12:47 – Updated: 2026-01-02 15:30

Title

sch_hfsc: make hfsc_qlen_notify() idempotent

Summary

In the Linux kernel, the following vulnerability has been resolved: sch_hfsc: make hfsc_qlen_notify() idempotent hfsc_qlen_notify() is not idempotent either and not friendly to its callers, like fq_codel_dequeue(). Let's make it idempotent to ease qdisc_tree_reduce_backlog() callers' life: 1. update_vf() decreases cl->cl_nactive, so we can check whether it is non-zero before calling it. 2. eltree_remove() always removes RB node cl->el_node, but we can use RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe.

Severity ?

No CVSS data available.

Assigner

Linux

References

URL

Tags

	https://git.kernel.org/stable/c/9a5fd5c2f4d4afdd5…
	https://git.kernel.org/stable/c/72c61ffbeeb8c50f6…
	https://git.kernel.org/stable/c/a5efc95a33bd4fcb8…
	https://git.kernel.org/stable/c/0475c85426b18eccd…
	https://git.kernel.org/stable/c/9030a91235ae4845e…
	https://git.kernel.org/stable/c/d06476714d2819b55…
	https://git.kernel.org/stable/c/c1175c4ad01dbc9c9…
	https://git.kernel.org/stable/c/51eb3b65544c9efd6…

Impacted products

Vendor

Product

Version

Linux

Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 9a5fd5c2f4d4afdd5e405083ee53e0789ce76956 (git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 72c61ffbeeb8c50f6d4d70c65d3283aa1bac57a7 (git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < a5efc95a33bd4fcb879250852828cc58c7862970 (git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 0475c85426b18eccdcb7f9fb58d8f8e9c6c58c87 (git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 9030a91235ae4845ec71902c3e0cecfc9ed1f2df (git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < d06476714d2819b550e0cc39222347e2c8941c9d (git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < c1175c4ad01dbc9c979d099861fa90a754f72059 (git)
Affected: 959466588aa7f84ccf79ae36a1d89542eaf9aaec , < 51eb3b65544c9efd6a1026889ee5fb5aa62da3bb (git)

Linux

Affected: 4.14
Unaffected: 0 , < 4.14 (semver)
Unaffected: 5.4.297 , ≤ 5.4.* (semver)
Unaffected: 5.10.241 , ≤ 5.10.* (semver)
Unaffected: 5.15.190 , ≤ 5.15.* (semver)
Unaffected: 6.1.138 , ≤ 6.1.* (semver)
Unaffected: 6.6.90 , ≤ 6.6.* (semver)
Unaffected: 6.12.28 , ≤ 6.12.* (semver)
Unaffected: 6.14.6 , ≤ 6.14.* (semver)
Unaffected: 6.15 , ≤ * (original_commit_for_fix)

Show details on NVD website

JSON

To clipboard

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                  "vulnerable": true
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                },
                {
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                  "vulnerable": true
                },
                {
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                  "vulnerable": true
                },
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                },
                {
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                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nsch_hfsc: make hfsc_qlen_notify() idempotent\n\nhfsc_qlen_notify() is not idempotent either and not friendly\nto its callers, like fq_codel_dequeue(). Let\u0027s make it idempotent\nto ease qdisc_tree_reduce_backlog() callers\u0027 life:\n\n1. update_vf() decreases cl-\u003ecl_nactive, so we can check whether it is\nnon-zero before calling it.\n\n2. eltree_remove() always removes RB node cl-\u003eel_node, but we can use\n   RB_EMPTY_NODE() + RB_CLEAR_NODE() to make it safe."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-01-02T15:30:10.869Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/9a5fd5c2f4d4afdd5e405083ee53e0789ce76956"
        },
        {
          "url": "https://git.kernel.org/stable/c/72c61ffbeeb8c50f6d4d70c65d3283aa1bac57a7"
        },
        {
          "url": "https://git.kernel.org/stable/c/a5efc95a33bd4fcb879250852828cc58c7862970"
        },
        {
          "url": "https://git.kernel.org/stable/c/0475c85426b18eccdcb7f9fb58d8f8e9c6c58c87"
        },
        {
          "url": "https://git.kernel.org/stable/c/9030a91235ae4845ec71902c3e0cecfc9ed1f2df"
        },
        {
          "url": "https://git.kernel.org/stable/c/d06476714d2819b550e0cc39222347e2c8941c9d"
        },
        {
          "url": "https://git.kernel.org/stable/c/c1175c4ad01dbc9c979d099861fa90a754f72059"
        },
        {
          "url": "https://git.kernel.org/stable/c/51eb3b65544c9efd6a1026889ee5fb5aa62da3bb"
        }
      ],
      "title": "sch_hfsc: make hfsc_qlen_notify() idempotent",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2025-38177",
    "datePublished": "2025-07-04T12:47:09.127Z",
    "dateReserved": "2025-04-16T04:51:23.992Z",
    "dateUpdated": "2026-01-02T15:30:10.869Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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

SUSE-SU-2026:0688-1

CVE-2021-0920 (GCVE-0-2021-0920)

CVE-2025-38177 (GCVE-0-2025-38177)

Tags

Sightings

Nomenclature