{ "schemaVersion": 1, "attribution": [ { "source": "CISA Known Exploited Vulnerabilities", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog", "licence": "US government work" }, { "source": "GitHub Advisory Database", "url": "https://github.com/advisories", "licence": "CC BY 4.0" }, { "source": "Have I Been Pwned", "url": "https://haveibeenpwned.com/", "licence": "CC BY 4.0" }, { "source": "CVE Program (CVE records)", "url": "https://www.cve.org/Legal/TermsOfUse", "licence": "CVE Terms of Use", "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.", "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy." }, { "source": "FIRST EPSS", "url": "https://www.first.org/epss/", "licence": "free to use; FIRST requests attribution" } ], "record": { "id": "CVE-2024-26893", "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2024-26893", "idYear": 2024, "status": "PUBLISHED", "publishedAt": "2024-04-17T10:27:45.332Z", "updatedAt": "2026-05-11T20:06:27.416Z", "importedAt": "2026-10-24T01:57:07.518Z", "snapshot": { "id": "cve_2026-10-24_midnight_baseline", "at": "2026-10-24T00:00:00.000Z", "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z" }, "facts": { "title": "firmware: arm_scmi: Fix double free in SMC transport cleanup path", "summary": "In the Linux kernel, the following vulnerability has been resolved:\n\nfirmware: arm_scmi: Fix double free in SMC transport cleanup path\n\nWhen the generic SCMI code tears down a channel, it calls the chan_free\ncallback function, defined by each transport. Since multiple protocols\nmight share the same transport_info member, chan_free() might want to\nclean up the same member multiple times within the given SCMI transport\nimplementation. In this case, it is SMC transport. 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't really work (for instance no SMC\nservice), the probe routines then tries to clean up, and triggers a crash.", "affected": [ { "vendor": "Linux", "product": "Linux", "defaultStatus": "unaffected", "versions": [ { "version": "1dc6558062dadfabd2fb3bd885fa6e92ec7196f2", "status": "affected", "versionType": "git", "lessThan": "0d276d9f335f41d6524258d58c0c0241ef9a83a4" }, { "version": "1dc6558062dadfabd2fb3bd885fa6e92ec7196f2", "status": "affected", "versionType": "git", "lessThan": "857f56db8c3a71f9871922b6984ff74ad588cb2c" }, { "version": "1dc6558062dadfabd2fb3bd885fa6e92ec7196f2", "status": "affected", "versionType": "git", "lessThan": "8ffaa17ccb1eb1b65cf85db63225a3581c303773" }, { "version": "1dc6558062dadfabd2fb3bd885fa6e92ec7196f2", "status": "affected", "versionType": "git", "lessThan": "ead445dd3d681020af333649a27306160eee761d" }, { "version": "1dc6558062dadfabd2fb3bd885fa6e92ec7196f2", "status": "affected", "versionType": "git", "lessThan": "f1d71576d2c9ec8fdb822173fa7f3de79475e9bd" } ] }, { "vendor": "Linux", "product": "Linux", "defaultStatus": "affected", "versions": [ { "version": "5.8", "status": "affected" }, { "version": "0", "status": "unaffected", "versionType": "semver", "lessThan": "5.8" }, { "version": "6.1.83", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.1.*" }, { "version": "6.6.23", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.6.*" }, { "version": "6.7.11", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.7.*" }, { "version": "6.8.2", "status": "unaffected", "versionType": "semver", "lessThanOrEqual": "6.8.*" }, { "version": "6.9", "status": "unaffected", "versionType": "original_commit_for_fix", "lessThanOrEqual": "*" } ] } ] } } }