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CVE Record

CVE-2024-53091: bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx

In the Linux kernel, the following vulnerability has been resolved: bpf: Add sk_is_inet and IS_ICSK check in tls_sw_has_ctx_tx/rx As the introduction of the support for vsock and unix sockets in sockmap, tls_sw_has_ctx_tx/rx cannot presume the socket passed in must be IS_ICSK. vsock and af_unix sockets have vsock_sock and unix_sock instead of inet_connection_sock. For these sockets, tls_get_ctx may return an invalid pointer and cause page fault in function tls_sw_ctx_rx. BUG: unable to handle page fault for address: 0000000000040030 Workqueue: vsock-loopback vsock_loopback_work RIP: 0010:sk_psock_strp_data_ready+0x23/0x60 Call Trace: ? __die+0x81/0xc3 ? no_context+0x194/0x350 ? do_page_fault+0x30/0x110 ? async_page_fault+0x3e/0x50 ? sk_psock_strp_data_ready+0x23/0x60 virtio_transport_recv_pkt+0x750/0x800 ? update_load_avg+0x7e/0x620 vsock_loopback_work+0xd0/0x100 process_one_work+0x1a7/0x360 worker_thread+0x30/0x390 ? create_worker+0x1a0/0x1a0 kthread+0x112/0x130 ? __kthread_cancel_work+0x40/0x40 ret_from_fork+0x1f/0x40 v2: - Add IS_ICSK check v3: - Update the commits in Fixes

MediumCVSS 5.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

CVE-2024-53091 is a Linux kernel flaw that can crash affected systems when certain socket handling paths interact incorrectly with TLS and sockmap logic. The documented impact is availability loss, not data theft or integrity compromise. It requires local access with some privileges, so it matters most for shared Linux hosts and systems running untrusted workloads.

Executive priority

Treat this as a scheduled but important kernel patching item. It is not shown as actively exploited, but it can affect availability on systems where local users or workloads are present.

Technical view

The kernel TLS helpers tls_sw_has_ctx_tx/rx assumed sockets were inet connection sockets. After sockmap gained vsock and Unix socket support, that assumption could make tls_get_ctx return an invalid pointer, leading to a kernel page fault in tls_sw_ctx_rx-related paths. The fix adds sk_is_inet and IS_ICSK checks.

Likely exposure

Exposure is local, not remote, based on CVSS AV:L and PR:L. Affected systems are Linux kernels in the source-listed affected ranges or commit lineage, especially where local users or workloads can reach the relevant BPF sockmap and socket paths.

Exploitation context

The bundle does not cite active exploitation, and KEV is false. The available evidence supports a local denial-of-service concern through kernel page fault behavior, not confidentiality or integrity impact.

Researcher notes

Key review points are the sockmap support for vsock and af_unix sockets and the new validation around sk_is_inet and IS_ICSK before TLS context handling. Evidence is limited to the CVE record and stable kernel commits.

Mitigation direction

  • Apply a vendor kernel update containing the referenced stable fixes.
  • Check Linux distribution advisories for backported fixes before judging by version alone.
  • Prioritize shared, multi-user, and untrusted-workload Linux systems.
  • If no update is available, follow vendor guidance for temporary exposure reduction.

Validation and detection

  • Inventory Linux kernel versions and vendor patch levels across affected assets.
  • Confirm whether vendor advisories map CVE-2024-53091 to installed kernels.
  • Review whether local untrusted users or workloads exist on affected hosts.
  • After patching, verify the running kernel is the updated vendor build.
Prepared
Confidence
high
Sources
5

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-2024-53091 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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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
4Source 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-2024-53091Attack 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
LinuxLinux94531cfcbe79c3598acf96806627b2137ca32eb9, 94531cfcbe79c3598acf96806627b2137ca32eb9, 94531cfcbe79c3598acf96806627b2137ca32eb9unaffected
LinuxLinux5.15, 0, 6.6.62, 6.11.9, 6.12affected
Weakness

CWE details

No CWE listed

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