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CVE Record

CVE-2022-50365: skbuff: Account for tail adjustment during pull operations

In the Linux kernel, the following vulnerability has been resolved: skbuff: Account for tail adjustment during pull operations Extending the tail can have some unexpected side effects if a program uses a helper like BPF_FUNC_skb_pull_data to read partial content beyond the head skb headlen when all the skbs in the gso frag_list are linear with no head_frag - kernel BUG at net/core/skbuff.c:4219! pc : skb_segment+0xcf4/0xd2c lr : skb_segment+0x63c/0xd2c Call trace: skb_segment+0xcf4/0xd2c __udp_gso_segment+0xa4/0x544 udp4_ufo_fragment+0x184/0x1c0 inet_gso_segment+0x16c/0x3a4 skb_mac_gso_segment+0xd4/0x1b0 __skb_gso_segment+0xcc/0x12c udp_rcv_segment+0x54/0x16c udp_queue_rcv_skb+0x78/0x144 udp_unicast_rcv_skb+0x8c/0xa4 __udp4_lib_rcv+0x490/0x68c udp_rcv+0x20/0x30 ip_protocol_deliver_rcu+0x1b0/0x33c ip_local_deliver+0xd8/0x1f0 ip_rcv+0x98/0x1a4 deliver_ptype_list_skb+0x98/0x1ec __netif_receive_skb_core+0x978/0xc60 Fix this by marking these skbs as GSO_DODGY so segmentation can handle the tail updates accordingly.

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2022-50365 is a Linux kernel flaw that can crash the system under specific local network-buffer handling conditions. It is rated medium/moderate because exploitation requires local privileges, but the impact is availability: a kernel BUG can cause service disruption.

Executive priority

Address in normal vulnerability remediation cycles, faster for shared Linux platforms or systems with untrusted local users. The main business risk is downtime from a kernel crash, not known data theft.

Technical view

The issue is in Linux skbuff handling when tail adjustments occur during pull operations, including BPF_FUNC_skb_pull_data cases with GSO frag_list skbs. Incorrect accounting can trigger a kernel BUG in skb_segment. The fix marks affected skbs as GSO_DODGY so segmentation handles tail updates correctly.

Likely exposure

Systems running affected Linux kernel builds are potentially exposed. The CVSS vector indicates local access and low privileges are required. Exact exposure depends on vendor backports and whether running kernels include the referenced stable fixes.

Exploitation context

The CVE record does not indicate active exploitation, and it is not marked CISA KEV in the provided data. Public details describe a crash condition, not remote code execution or data compromise.

Researcher notes

The provided record names Linux kernel skbuff tail adjustment during pull operations and references stable commits. CVSS is 5.5 with local, low-privilege access and high availability impact. Affected-version detail in the bundle is incomplete; validate against upstream and distribution-specific advisories.

Mitigation direction

  • Apply Linux kernel updates from your distribution or vendor.
  • Confirm the update includes one of the referenced stable kernel fixes.
  • Prioritize internet-facing or multi-tenant Linux systems where local users or workloads exist.
  • If no update is available, follow vendor guidance for temporary mitigations.

Validation and detection

  • Inventory running Linux kernel versions across servers, containers hosts, and appliances.
  • Check vendor advisories for CVE-2022-50365 applicability and fixed package versions.
  • Verify installed kernel changelogs include the relevant skbuff/GSO_DODGY fix.
  • Confirm systems have rebooted into the patched kernel after update.
Prepared
Confidence
medium
Sources
11

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2022-50365 mapping review

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Vulnerability profileCVE Program record
Severity
Medium
CVSS
5.5 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

1CVSS vectors
3Timeline events
1ADP providers
10Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: noTechnical Impact: partial

CVSS vector scores

1 official score

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
5.5CVSS 3.1MediumCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H1.83.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

5.5Medium
CVSS 3.1 vector shape for CVE-2022-50365Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
LinuxLinux162a5a8c3aff15c449e6b38355cdf80ab4f77a5a, 55fb612bef7fd237fb70068e2b6ff1cd1543a8ef, 821302dd0c51d29269ef73a595bdff294419e2cd, 3dcbdb134f329842a38f0e6797191b885ab00a00, 3dcbdb134f329842a38f0e6797191b885ab00a00, 3dcbdb134f329842a38f0e6797191b885ab00a00, 3dcbdb134f329842a38f0e6797191b885ab00a00, 3dcbdb134f329842a38f0e6797191b885ab00a00, 3dcbdb134f329842a38f0e6797191b885ab00a00, 92984818ff8cfd97311a5e0ac27f148a00df2b54unaffected
LinuxLinux5.3, 0, 4.9.337, 4.14.303, 4.19.270, 5.4.229, 5.10.163, 5.15.86, 6.0.16, 6.1.2, 6.2affected
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.