CVE-2022-49844 (GCVE-0-2022-49844)

Vulnerability from cvelistv5 – Published: 2025-05-01 14:09 – Updated: 2026-05-11 19:07
VLAI
Title
can: dev: fix skb drop check
Summary
In the Linux kernel, the following vulnerability has been resolved: can: dev: fix skb drop check In commit a6d190f8c767 ("can: skb: drop tx skb if in listen only mode") the priv->ctrlmode element is read even on virtual CAN interfaces that do not create the struct can_priv at startup. This out-of-bounds read may lead to CAN frame drops for virtual CAN interfaces like vcan and vxcan. This patch mainly reverts the original commit and adds a new helper for CAN interface drivers that provide the required information in struct can_priv. [mkl: patch pch_can, too]
Severity
7.1 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a6d190f8c7670068d8c154ef8477eca07b5e3574 , < 386c49fe31ee748e053860b3bac7794a933ac9ac (git)
Affected: a6d190f8c7670068d8c154ef8477eca07b5e3574 , < ae64438be1923e3c1102d90fd41db7afcfaf54cc (git)
Create a notification for this product.
Linux Linux Affected: 6.0
Unaffected: 0 , < 6.0 (semver)
Unaffected: 6.0.9 , ≤ 6.0.* (semver)
Unaffected: 6.1 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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    "redhat_vex": {
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      "product_status:known_affected": "150",
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      "source": "Red Hat CSAF VEX",
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    },
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.1, \"attackVector\": \"LOCAL\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H\", \"integrityImpact\": \"NONE\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"HIGH\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"HIGH\"}}, {\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2022-49844\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2025-10-01T17:00:29.049207Z\"}}}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-125\", \"description\": \"CWE-125 Out-of-bounds Read\"}]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2025-10-01T14:34:39.476Z\"}}], \"cna\": {\"title\": \"can: dev: fix skb drop check\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a6d190f8c7670068d8c154ef8477eca07b5e3574\", \"lessThan\": \"386c49fe31ee748e053860b3bac7794a933ac9ac\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a6d190f8c7670068d8c154ef8477eca07b5e3574\", \"lessThan\": \"ae64438be1923e3c1102d90fd41db7afcfaf54cc\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/net/can/at91_can.c\", \"drivers/net/can/c_can/c_can_main.c\", \"drivers/net/can/can327.c\", \"drivers/net/can/cc770/cc770.c\", \"drivers/net/can/ctucanfd/ctucanfd_base.c\", \"drivers/net/can/dev/skb.c\", \"drivers/net/can/flexcan/flexcan-core.c\", \"drivers/net/can/grcan.c\", \"drivers/net/can/ifi_canfd/ifi_canfd.c\", \"drivers/net/can/janz-ican3.c\", \"drivers/net/can/kvaser_pciefd.c\", \"drivers/net/can/m_can/m_can.c\", \"drivers/net/can/mscan/mscan.c\", \"drivers/net/can/pch_can.c\", \"drivers/net/can/peak_canfd/peak_canfd.c\", \"drivers/net/can/rcar/rcar_can.c\", \"drivers/net/can/rcar/rcar_canfd.c\", \"drivers/net/can/sja1000/sja1000.c\", \"drivers/net/can/slcan/slcan-core.c\", \"drivers/net/can/softing/softing_main.c\", \"drivers/net/can/spi/hi311x.c\", \"drivers/net/can/spi/mcp251x.c\", \"drivers/net/can/spi/mcp251xfd/mcp251xfd-tx.c\", \"drivers/net/can/sun4i_can.c\", \"drivers/net/can/ti_hecc.c\", \"drivers/net/can/usb/ems_usb.c\", \"drivers/net/can/usb/esd_usb.c\", \"drivers/net/can/usb/etas_es58x/es58x_core.c\", \"drivers/net/can/usb/gs_usb.c\", \"drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c\", \"drivers/net/can/usb/mcba_usb.c\", \"drivers/net/can/usb/peak_usb/pcan_usb_core.c\", \"drivers/net/can/usb/ucan.c\", \"drivers/net/can/usb/usb_8dev.c\", \"drivers/net/can/xilinx_can.c\", \"include/linux/can/dev.h\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"6.0\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"6.0\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"6.0.9\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.0.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/net/can/at91_can.c\", \"drivers/net/can/c_can/c_can_main.c\", \"drivers/net/can/can327.c\", \"drivers/net/can/cc770/cc770.c\", \"drivers/net/can/ctucanfd/ctucanfd_base.c\", \"drivers/net/can/dev/skb.c\", \"drivers/net/can/flexcan/flexcan-core.c\", \"drivers/net/can/grcan.c\", \"drivers/net/can/ifi_canfd/ifi_canfd.c\", \"drivers/net/can/janz-ican3.c\", \"drivers/net/can/kvaser_pciefd.c\", \"drivers/net/can/m_can/m_can.c\", \"drivers/net/can/mscan/mscan.c\", \"drivers/net/can/pch_can.c\", \"drivers/net/can/peak_canfd/peak_canfd.c\", \"drivers/net/can/rcar/rcar_can.c\", \"drivers/net/can/rcar/rcar_canfd.c\", \"drivers/net/can/sja1000/sja1000.c\", \"drivers/net/can/slcan/slcan-core.c\", \"drivers/net/can/softing/softing_main.c\", \"drivers/net/can/spi/hi311x.c\", \"drivers/net/can/spi/mcp251x.c\", \"drivers/net/can/spi/mcp251xfd/mcp251xfd-tx.c\", \"drivers/net/can/sun4i_can.c\", \"drivers/net/can/ti_hecc.c\", \"drivers/net/can/usb/ems_usb.c\", \"drivers/net/can/usb/esd_usb.c\", \"drivers/net/can/usb/etas_es58x/es58x_core.c\", \"drivers/net/can/usb/gs_usb.c\", \"drivers/net/can/usb/kvaser_usb/kvaser_usb_core.c\", \"drivers/net/can/usb/mcba_usb.c\", \"drivers/net/can/usb/peak_usb/pcan_usb_core.c\", \"drivers/net/can/usb/ucan.c\", \"drivers/net/can/usb/usb_8dev.c\", \"drivers/net/can/xilinx_can.c\", \"include/linux/can/dev.h\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/386c49fe31ee748e053860b3bac7794a933ac9ac\"}, {\"url\": \"https://git.kernel.org/stable/c/ae64438be1923e3c1102d90fd41db7afcfaf54cc\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\ncan: dev: fix skb drop check\\n\\nIn commit a6d190f8c767 (\\\"can: skb: drop tx skb if in listen only\\nmode\\\") the priv-\u003ectrlmode element is read even on virtual CAN\\ninterfaces that do not create the struct can_priv at startup. This\\nout-of-bounds read may lead to CAN frame drops for virtual CAN\\ninterfaces like vcan and vxcan.\\n\\nThis patch mainly reverts the original commit and adds a new helper\\nfor CAN interface drivers that provide the required information in\\nstruct can_priv.\\n\\n[mkl: patch pch_can, too]\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.0.9\", \"versionStartIncluding\": \"6.0\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1\", \"versionStartIncluding\": \"6.0\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2025-05-04T08:46:44.354Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2022-49844\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-10-01T17:00:34.409Z\", \"dateReserved\": \"2025-05-01T14:05:17.229Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2025-05-01T14:09:58.999Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}



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Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.