Vulnerability-Lookup

GHSA-559C-J26R-95QC

Vulnerability from github – Published: 2024-04-28 15:30 – Updated: 2025-01-14 15:30

Details

In the Linux kernel, the following vulnerability has been resolved:

sfc: fix null pointer dereference in efx_hard_start_xmit

Trying to get the channel from the tx_queue variable here is wrong because we can only be here if tx_queue is NULL, so we shouldn't dereference it. As the above comment in the code says, this is very unlikely to happen, but it's wrong anyway so let's fix it.

I hit this issue because of a different bug that caused tx_queue to be NULL. If that happens, this is the error message that we get here: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]

Severity

5.5 (Medium)


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

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  "affected": [],
  "aliases": [
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  ],
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    "cwe_ids": [
      "CWE-476"
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  "details": "In the Linux kernel, the following vulnerability has been resolved:\n\nsfc: fix null pointer dereference in efx_hard_start_xmit\n\nTrying to get the channel from the tx_queue variable here is wrong\nbecause we can only be here if tx_queue is NULL, so we shouldn\u0027t\ndereference it. As the above comment in the code says, this is very\nunlikely to happen, but it\u0027s wrong anyway so let\u0027s fix it.\n\nI hit this issue because of a different bug that caused tx_queue to be\nNULL. If that happens, this is the error message that we get here:\n  BUG: unable to handle kernel NULL pointer dereference at 0000000000000020\n  [...]\n  RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]",
  "id": "GHSA-559c-j26r-95qc",
  "modified": "2025-01-14T15:30:49Z",
  "published": "2024-04-28T15:30:29Z",
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CVE-2022-48648 (GCVE-0-2022-48648)

Vulnerability from cvelistv5 – Published: 2024-04-28 13:00 – Updated: 2026-05-11 18:44

Title

sfc: fix null pointer dereference in efx_hard_start_xmit

Summary

In the Linux kernel, the following vulnerability has been resolved: sfc: fix null pointer dereference in efx_hard_start_xmit Trying to get the channel from the tx_queue variable here is wrong because we can only be here if tx_queue is NULL, so we shouldn't dereference it. As the above comment in the code says, this is very unlikely to happen, but it's wrong anyway so let's fix it. I hit this issue because of a different bug that caused tx_queue to be NULL. If that happens, this is the error message that we get here: BUG: unable to handle kernel NULL pointer dereference at 0000000000000020 [...] RIP: 0010:efx_hard_start_xmit+0x153/0x170 [sfc]

Severity

No CVSS data available.

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2024-06-17 17:40 UTC

Assigner

Linux mitre root

References

4 references

URL	Tags
https://git.kernel.org/stable/c/b3b41d4d95d3822b2…
https://git.kernel.org/stable/c/8547c7bfc0617e718…
https://git.kernel.org/stable/c/b3b952168ee1f220b…
https://git.kernel.org/stable/c/0a242eb2913a4aa3d…

Impacted products

2 products

Vendor	Product	Version
Linux	Linux	Affected: 12804793b17c0e19115a90d98f2f3df0cb79e233 , < b3b41d4d95d3822b2e459ecbc80d030ea6aec5e7 (git) Affected: 12804793b17c0e19115a90d98f2f3df0cb79e233 , < 8547c7bfc0617e7184e4da65b9b96681fcfe9998 (git) Affected: 12804793b17c0e19115a90d98f2f3df0cb79e233 , < b3b952168ee1f220ba729fa100fd9d5aa752eb03 (git) Affected: 12804793b17c0e19115a90d98f2f3df0cb79e233 , < 0a242eb2913a4aa3d6fbdb86559f27628e9466f3 (git)
Linux	Linux	Affected: 5.10 Unaffected: 0 , < 5.10 (semver) Unaffected: 5.10.146 , ≤ 5.10.* (semver) Unaffected: 5.15.71 , ≤ 5.15.* (semver) Unaffected: 5.19.12 , ≤ 5.19.* (semver) Unaffected: 6.0 , ≤ * (original_commit_for_fix)

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Sightings

Author	Source	Type	Date	Other

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.

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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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