CVE-2024-36950 (GCVE-0-2024-36950)

Vulnerability from cvelistv5 – Published: 2024-05-30 15:35 – Updated: 2026-01-05 10:36
VLAI?
Title
firewire: ohci: mask bus reset interrupts between ISR and bottom half
Summary
In the Linux kernel, the following vulnerability has been resolved: firewire: ohci: mask bus reset interrupts between ISR and bottom half In the FireWire OHCI interrupt handler, if a bus reset interrupt has occurred, mask bus reset interrupts until bus_reset_work has serviced and cleared the interrupt. Normally, we always leave bus reset interrupts masked. We infer the bus reset from the self-ID interrupt that happens shortly thereafter. A scenario where we unmask bus reset interrupts was introduced in 2008 in a007bb857e0b26f5d8b73c2ff90782d9c0972620: If OHCI_PARAM_DEBUG_BUSRESETS (8) is set in the debug parameter bitmask, we will unmask bus reset interrupts so we can log them. irq_handler logs the bus reset interrupt. However, we can't clear the bus reset event flag in irq_handler, because we won't service the event until later. irq_handler exits with the event flag still set. If the corresponding interrupt is still unmasked, the first bus reset will usually freeze the system due to irq_handler being called again each time it exits. This freeze can be reproduced by loading firewire_ohci with "modprobe firewire_ohci debug=-1" (to enable all debugging output). Apparently there are also some cases where bus_reset_work will get called soon enough to clear the event, and operation will continue normally. This freeze was first reported a few months after a007bb85 was committed, but until now it was never fixed. The debug level could safely be set to -1 through sysfs after the module was loaded, but this would be ineffectual in logging bus reset interrupts since they were only unmasked during initialization. irq_handler will now leave the event flag set but mask bus reset interrupts, so irq_handler won't be called again and there will be no freeze. If OHCI_PARAM_DEBUG_BUSRESETS is enabled, bus_reset_work will unmask the interrupt after servicing the event, so future interrupts will be caught as desired. As a side effect to this change, OHCI_PARAM_DEBUG_BUSRESETS can now be enabled through sysfs in addition to during initial module loading. However, when enabled through sysfs, logging of bus reset interrupts will be effective only starting with the second bus reset, after bus_reset_work has executed.
Severity ?
4.4 (Medium)
CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < b3948c69d60279fce5b2eeda92a07d66296c8130 (git)
Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < 31279bbca40d2f40cb3bbb6d538ec9620a645dec (git)
Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < fa273f312334246c909475c5868e6daab889cc8c (git)
Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < 4f9cc355c328fc4f41cbd9c4cd58b235184fa420 (git)
Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < 6fafe3661712b143d9c69a7322294bd53f559d5d (git)
Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < 5982887de60c1b84f9c0ca07c835814d07fd1da0 (git)
Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < 8643332aac0576581cfdf01798ea3e4e0d624b61 (git)
Affected: a007bb857e0b26f5d8b73c2ff90782d9c0972620 , < 752e3c53de0fa3b7d817a83050b6699b8e9c6ec9 (git)
Create a notification for this product.
    Linux Linux Affected: 2.6.26
Unaffected: 0 , < 2.6.26 (semver)
Unaffected: 4.19.314 , ≤ 4.19.* (semver)
Unaffected: 5.4.276 , ≤ 5.4.* (semver)
Unaffected: 5.10.217 , ≤ 5.10.* (semver)
Unaffected: 5.15.159 , ≤ 5.15.* (semver)
Unaffected: 6.1.91 , ≤ 6.1.* (semver)
Unaffected: 6.6.31 , ≤ 6.6.* (semver)
Unaffected: 6.8.10 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
Create a notification for this product.
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{\"id\": \"CVE-2024-36950\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2024-06-04T15:34:28.122404Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2024-06-04T15:34:31.682Z\"}}], \"cna\": {\"title\": \"firewire: ohci: mask bus reset interrupts between ISR and bottom half\", \"affected\": [{\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"b3948c69d60279fce5b2eeda92a07d66296c8130\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"31279bbca40d2f40cb3bbb6d538ec9620a645dec\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"fa273f312334246c909475c5868e6daab889cc8c\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"4f9cc355c328fc4f41cbd9c4cd58b235184fa420\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"6fafe3661712b143d9c69a7322294bd53f559d5d\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"5982887de60c1b84f9c0ca07c835814d07fd1da0\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"8643332aac0576581cfdf01798ea3e4e0d624b61\", \"versionType\": \"git\"}, {\"status\": \"affected\", \"version\": \"a007bb857e0b26f5d8b73c2ff90782d9c0972620\", \"lessThan\": \"752e3c53de0fa3b7d817a83050b6699b8e9c6ec9\", \"versionType\": \"git\"}], \"programFiles\": [\"drivers/firewire/ohci.c\"], \"defaultStatus\": \"unaffected\"}, {\"repo\": \"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git\", \"vendor\": \"Linux\", \"product\": \"Linux\", \"versions\": [{\"status\": \"affected\", \"version\": \"2.6.26\"}, {\"status\": \"unaffected\", \"version\": \"0\", \"lessThan\": \"2.6.26\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"4.19.314\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"4.19.*\"}, {\"status\": \"unaffected\", \"version\": \"5.4.276\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.4.*\"}, {\"status\": \"unaffected\", \"version\": \"5.10.217\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.10.*\"}, {\"status\": \"unaffected\", \"version\": \"5.15.159\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"5.15.*\"}, {\"status\": \"unaffected\", \"version\": \"6.1.91\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.1.*\"}, {\"status\": \"unaffected\", \"version\": \"6.6.31\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.6.*\"}, {\"status\": \"unaffected\", \"version\": \"6.8.10\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"6.8.*\"}, {\"status\": \"unaffected\", \"version\": \"6.9\", \"versionType\": \"original_commit_for_fix\", \"lessThanOrEqual\": \"*\"}], \"programFiles\": [\"drivers/firewire/ohci.c\"], \"defaultStatus\": \"affected\"}], \"references\": [{\"url\": \"https://git.kernel.org/stable/c/b3948c69d60279fce5b2eeda92a07d66296c8130\"}, {\"url\": \"https://git.kernel.org/stable/c/31279bbca40d2f40cb3bbb6d538ec9620a645dec\"}, {\"url\": \"https://git.kernel.org/stable/c/fa273f312334246c909475c5868e6daab889cc8c\"}, {\"url\": \"https://git.kernel.org/stable/c/4f9cc355c328fc4f41cbd9c4cd58b235184fa420\"}, {\"url\": \"https://git.kernel.org/stable/c/6fafe3661712b143d9c69a7322294bd53f559d5d\"}, {\"url\": \"https://git.kernel.org/stable/c/5982887de60c1b84f9c0ca07c835814d07fd1da0\"}, {\"url\": \"https://git.kernel.org/stable/c/8643332aac0576581cfdf01798ea3e4e0d624b61\"}, {\"url\": \"https://git.kernel.org/stable/c/752e3c53de0fa3b7d817a83050b6699b8e9c6ec9\"}], \"x_generator\": {\"engine\": \"bippy-1.2.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"In the Linux kernel, the following vulnerability has been resolved:\\n\\nfirewire: ohci: mask bus reset interrupts between ISR and bottom half\\n\\nIn the FireWire OHCI interrupt handler, if a bus reset interrupt has\\noccurred, mask bus reset interrupts until bus_reset_work has serviced and\\ncleared the interrupt.\\n\\nNormally, we always leave bus reset interrupts masked. We infer the bus\\nreset from the self-ID interrupt that happens shortly thereafter. A\\nscenario where we unmask bus reset interrupts was introduced in 2008 in\\na007bb857e0b26f5d8b73c2ff90782d9c0972620: If\\nOHCI_PARAM_DEBUG_BUSRESETS (8) is set in the debug parameter bitmask, we\\nwill unmask bus reset interrupts so we can log them.\\n\\nirq_handler logs the bus reset interrupt. However, we can\u0027t clear the bus\\nreset event flag in irq_handler, because we won\u0027t service the event until\\nlater. irq_handler exits with the event flag still set. If the\\ncorresponding interrupt is still unmasked, the first bus reset will\\nusually freeze the system due to irq_handler being called again each\\ntime it exits. This freeze can be reproduced by loading firewire_ohci\\nwith \\\"modprobe firewire_ohci debug=-1\\\" (to enable all debugging output).\\nApparently there are also some cases where bus_reset_work will get called\\nsoon enough to clear the event, and operation will continue normally.\\n\\nThis freeze was first reported a few months after a007bb85 was committed,\\nbut until now it was never fixed. The debug level could safely be set\\nto -1 through sysfs after the module was loaded, but this would be\\nineffectual in logging bus reset interrupts since they were only\\nunmasked during initialization.\\n\\nirq_handler will now leave the event flag set but mask bus reset\\ninterrupts, so irq_handler won\u0027t be called again and there will be no\\nfreeze. If OHCI_PARAM_DEBUG_BUSRESETS is enabled, bus_reset_work will\\nunmask the interrupt after servicing the event, so future interrupts\\nwill be caught as desired.\\n\\nAs a side effect to this change, OHCI_PARAM_DEBUG_BUSRESETS can now be\\nenabled through sysfs in addition to during initial module loading.\\nHowever, when enabled through sysfs, logging of bus reset interrupts will\\nbe effective only starting with the second bus reset, after\\nbus_reset_work has executed.\"}], \"cpeApplicability\": [{\"nodes\": [{\"negate\": false, \"cpeMatch\": [{\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"4.19.314\", \"versionStartIncluding\": \"2.6.26\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.4.276\", \"versionStartIncluding\": \"2.6.26\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.10.217\", \"versionStartIncluding\": \"2.6.26\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"5.15.159\", \"versionStartIncluding\": \"2.6.26\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.1.91\", \"versionStartIncluding\": \"2.6.26\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.6.31\", \"versionStartIncluding\": \"2.6.26\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.8.10\", \"versionStartIncluding\": \"2.6.26\"}, {\"criteria\": \"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*\", \"vulnerable\": true, \"versionEndExcluding\": \"6.9\", \"versionStartIncluding\": \"2.6.26\"}], \"operator\": \"OR\"}]}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2026-01-05T10:36:28.444Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-36950\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-01-05T10:36:28.444Z\", \"dateReserved\": \"2024-05-30T15:25:07.079Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-05-30T15:35:46.262Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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  • 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.
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  • 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.