CVE-2024-26893 (GCVE-0-2024-26893)

Vulnerability from cvelistv5 – Published: 2024-04-17 10:27 – Updated: 2025-05-04 08:59
VLAI?
Title
firmware: arm_scmi: Fix double free in SMC transport cleanup path
Summary
In the Linux kernel, the following vulnerability has been resolved: firmware: arm_scmi: Fix double free in SMC transport cleanup path When the generic SCMI code tears down a channel, it calls the chan_free callback function, defined by each transport. Since multiple protocols might share the same transport_info member, chan_free() might want to clean up the same member multiple times within the given SCMI transport implementation. In this case, it is SMC transport. This will lead to a NULL pointer dereference at the second time: | scmi_protocol scmi_dev.1: Enabled polling mode TX channel - prot_id:16 | arm-scmi firmware:scmi: SCMI Notifications - Core Enabled. | arm-scmi firmware:scmi: unable to communicate with SCMI | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000 | Mem abort info: | ESR = 0x0000000096000004 | EC = 0x25: DABT (current EL), IL = 32 bits | SET = 0, FnV = 0 | EA = 0, S1PTW = 0 | FSC = 0x04: level 0 translation fault | Data abort info: | ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000 | CM = 0, WnR = 0, TnD = 0, TagAccess = 0 | GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 | user pgtable: 4k pages, 48-bit VAs, pgdp=0000000881ef8000 | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000 | Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP | Modules linked in: | CPU: 4 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc2-00124-g455ef3d016c9-dirty #793 | Hardware name: FVP Base RevC (DT) | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--) | pc : smc_chan_free+0x3c/0x6c | lr : smc_chan_free+0x3c/0x6c | Call trace: | smc_chan_free+0x3c/0x6c | idr_for_each+0x68/0xf8 | scmi_cleanup_channels.isra.0+0x2c/0x58 | scmi_probe+0x434/0x734 | platform_probe+0x68/0xd8 | really_probe+0x110/0x27c | __driver_probe_device+0x78/0x12c | driver_probe_device+0x3c/0x118 | __driver_attach+0x74/0x128 | bus_for_each_dev+0x78/0xe0 | driver_attach+0x24/0x30 | bus_add_driver+0xe4/0x1e8 | driver_register+0x60/0x128 | __platform_driver_register+0x28/0x34 | scmi_driver_init+0x84/0xc0 | do_one_initcall+0x78/0x33c | kernel_init_freeable+0x2b8/0x51c | kernel_init+0x24/0x130 | ret_from_fork+0x10/0x20 | Code: f0004701 910a0021 aa1403e5 97b91c70 (b9400280) | ---[ end trace 0000000000000000 ]--- Simply check for the struct pointer being NULL before trying to access its members, to avoid this situation. This was found when a transport doesn't really work (for instance no SMC service), the probe routines then tries to clean up, and triggers a crash.
Severity ?
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version
Linux Linux Affected: 1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 , < 0d276d9f335f41d6524258d58c0c0241ef9a83a4 (git)
Affected: 1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 , < 857f56db8c3a71f9871922b6984ff74ad588cb2c (git)
Affected: 1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 , < 8ffaa17ccb1eb1b65cf85db63225a3581c303773 (git)
Affected: 1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 , < ead445dd3d681020af333649a27306160eee761d (git)
Affected: 1dc6558062dadfabd2fb3bd885fa6e92ec7196f2 , < f1d71576d2c9ec8fdb822173fa7f3de79475e9bd (git)
Create a notification for this product.
    Linux Linux Affected: 5.8
Unaffected: 0 , < 5.8 (semver)
Unaffected: 6.1.83 , ≤ 6.1.* (semver)
Unaffected: 6.6.23 , ≤ 6.6.* (semver)
Unaffected: 6.7.11 , ≤ 6.7.* (semver)
Unaffected: 6.8.2 , ≤ 6.8.* (semver)
Unaffected: 6.9 , ≤ * (original_commit_for_fix)
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This will lead to a NULL\\npointer dereference at the second time:\\n\\n    | scmi_protocol scmi_dev.1: Enabled polling mode TX channel - prot_id:16\\n    | arm-scmi firmware:scmi: SCMI Notifications - Core Enabled.\\n    | arm-scmi firmware:scmi: unable to communicate with SCMI\\n    | Unable to handle kernel NULL pointer dereference at virtual address 0000000000000000\\n    | Mem abort info:\\n    |   ESR = 0x0000000096000004\\n    |   EC = 0x25: DABT (current EL), IL = 32 bits\\n    |   SET = 0, FnV = 0\\n    |   EA = 0, S1PTW = 0\\n    |   FSC = 0x04: level 0 translation fault\\n    | Data abort info:\\n    |   ISV = 0, ISS = 0x00000004, ISS2 = 0x00000000\\n    |   CM = 0, WnR = 0, TnD = 0, TagAccess = 0\\n    |   GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0\\n    | user pgtable: 4k pages, 48-bit VAs, pgdp=0000000881ef8000\\n    | [0000000000000000] pgd=0000000000000000, p4d=0000000000000000\\n    | Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP\\n    | Modules linked in:\\n    | CPU: 4 PID: 1 Comm: swapper/0 Not tainted 6.7.0-rc2-00124-g455ef3d016c9-dirty #793\\n    | Hardware name: FVP Base RevC (DT)\\n    | pstate: 61400009 (nZCv daif +PAN -UAO -TCO +DIT -SSBS BTYPE=--)\\n    | pc : smc_chan_free+0x3c/0x6c\\n    | lr : smc_chan_free+0x3c/0x6c\\n    | Call trace:\\n    |  smc_chan_free+0x3c/0x6c\\n    |  idr_for_each+0x68/0xf8\\n    |  scmi_cleanup_channels.isra.0+0x2c/0x58\\n    |  scmi_probe+0x434/0x734\\n    |  platform_probe+0x68/0xd8\\n    |  really_probe+0x110/0x27c\\n    |  __driver_probe_device+0x78/0x12c\\n    |  driver_probe_device+0x3c/0x118\\n    |  __driver_attach+0x74/0x128\\n    |  bus_for_each_dev+0x78/0xe0\\n    |  driver_attach+0x24/0x30\\n    |  bus_add_driver+0xe4/0x1e8\\n    |  driver_register+0x60/0x128\\n    |  __platform_driver_register+0x28/0x34\\n    |  scmi_driver_init+0x84/0xc0\\n    |  do_one_initcall+0x78/0x33c\\n    |  kernel_init_freeable+0x2b8/0x51c\\n    |  kernel_init+0x24/0x130\\n    |  ret_from_fork+0x10/0x20\\n    | Code: f0004701 910a0021 aa1403e5 97b91c70 (b9400280)\\n    | ---[ end trace 0000000000000000 ]---\\n\\nSimply check for the struct pointer being NULL before trying to access\\nits members, to avoid this situation.\\n\\nThis was found when a transport doesn\u0027t really work (for instance no SMC\\nservice), the probe routines then tries to clean up, and triggers a crash.\"}], \"providerMetadata\": {\"orgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"shortName\": \"Linux\", \"dateUpdated\": \"2024-11-05T09:17:45.161Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2024-26893\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2024-11-05T09:17:45.161Z\", \"dateReserved\": \"2024-02-19T14:20:24.186Z\", \"assignerOrgId\": \"416baaa9-dc9f-4396-8d5f-8c081fb06d67\", \"datePublished\": \"2024-04-17T10:27:45.332Z\", \"assignerShortName\": \"Linux\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.1"
    }
  }
}


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Sightings

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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.
  • 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.
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  • 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.