5.5
MEDIUM
CVE-2024-26893
Linux Firmware Arm SCMI Double Free
Description

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.

INFO

Published Date :

April 17, 2024, 11:15 a.m.

Last Modified :

Jan. 27, 2025, 3:14 p.m.

Source :

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Remotely Exploitable :

No

Impact Score :

3.6

Exploitability Score :

1.8
Affected Products

The following products are affected by CVE-2024-26893 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Linux linux_kernel
: Total Affected Vendor : 1 | Products : 1
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2024-26893.

URL Resource
https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4 Patch
https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c Patch
https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773 Patch
https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d Patch
https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd Patch
https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4 Patch
https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c Patch
https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773 Patch
https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d Patch
https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd Patch

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2024-26893 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2024-26893 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • Initial Analysis by [email protected]

    Jan. 27, 2025

    Action Type Old Value New Value
    Added CVSS V3.1 NIST AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
    Added CWE NIST CWE-415
    Added CPE Configuration OR *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 5.8 up to (excluding) 6.1.83 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.2 up to (excluding) 6.6.23 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.7 up to (excluding) 6.7.11 *cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:* versions from (including) 6.8 up to (excluding) 6.8.2
    Changed Reference Type https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4 No Types Assigned https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4 Patch
    Changed Reference Type https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4 No Types Assigned https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4 Patch
    Changed Reference Type https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c No Types Assigned https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c Patch
    Changed Reference Type https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c No Types Assigned https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c Patch
    Changed Reference Type https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773 No Types Assigned https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773 Patch
    Changed Reference Type https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773 No Types Assigned https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773 Patch
    Changed Reference Type https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d No Types Assigned https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d Patch
    Changed Reference Type https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d No Types Assigned https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d Patch
    Changed Reference Type https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd No Types Assigned https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd Patch
    Changed Reference Type https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd No Types Assigned https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd Patch
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4
    Added Reference https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c
    Added Reference https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773
    Added Reference https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d
    Added Reference https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 29, 2024

    Action Type Old Value New Value
  • CVE Modified by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    May. 14, 2024

    Action Type Old Value New Value
  • CVE Received by 416baaa9-dc9f-4396-8d5f-8c081fb06d67

    Apr. 17, 2024

    Action Type Old Value New Value
    Added Description 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.
    Added Reference kernel.org https://git.kernel.org/stable/c/0d276d9f335f41d6524258d58c0c0241ef9a83a4 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/857f56db8c3a71f9871922b6984ff74ad588cb2c [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/8ffaa17ccb1eb1b65cf85db63225a3581c303773 [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/ead445dd3d681020af333649a27306160eee761d [No types assigned]
    Added Reference kernel.org https://git.kernel.org/stable/c/f1d71576d2c9ec8fdb822173fa7f3de79475e9bd [No types assigned]
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2024-26893 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2024-26893 weaknesses.

CVSS31 - Vulnerability Scoring System
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Latest DB Update: Jul. 14, 2025 7:58