{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-72171", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-08-09T03:40:39.910Z", "datePublished": "2026-08-15T05:53:37.070Z", "dateUpdated": "2026-08-17T05:41:09.326Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-17T05:41:09.326Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nmtd: slram: remove failed entries from the device list\n\nregister_device() links a new slram_mtdlist entry before allocating all\nof the state needed by the entry. If a later allocation, memremap(), or\nmtd_device_register() fails, the partially initialized entry remains on\nthe global list. A later cleanup can then dereference or free invalid\nstate from that failed entry.\n\nUnwind the partially initialized entry and clear the list tail on each\nfailure path after the entry has been linked." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - The flaw is only reachable through local module initialization (finit_module/init_module → init_slram → parse_cmdline → register_device) or the slram= boot parameter; there is no network, adjacent-wireless, or physical-device input path to this MTD driver registration code.\nAC:L - An attacker who can load the module controls map parameters and can reliably force register_device() to fail (e.g., memremap on an overlapping/invalid RAM region documented to fail), after which parse_cmdline deterministically calls unregister_devices() on the corrupt list entry.\nPR:L - Exploitation requires loading the slram module via finit_module/init_module, which checks CAP_SYS_MODULE; on kernels allowing unprivileged user namespaces this capability is available to a local unprivileged user, matching CNA guidance for module-init bugs rather than init-namespace root only.\nUI:N - No victim interaction is required; the attacker triggers module load with crafted parameters and the kernel fault occurs automatically on the register_device() failure cleanup path without anyone mounting filesystems or opening devices.\nS:U - Memory corruption occurs entirely within kernel context during module-init teardown of the slram driver; it does not cross VM/hypervisor, IOMMU, or other security boundaries into a separate authority.\nC:H - Failed entries leave NULL or dangling mtdinfo/priv pointers on slram_mtdlist, and unregister_devices() dereferences/frees that invalid state, constituting use-after-free and out-of-bounds kernel memory access that can expose reclaimed heap contents.\nI:H - The mtd_device_register() failure path frees mtdinfo and priv while the list node remains, so unregister_devices() performs double-free and use-after-free on those structures, which is heap corruption exploitable for arbitrary kernel writes and control-flow hijacking.\nA:H - unregister_devices() on a partially initialized entry can NULL-dereference mtdinfo, double-free kmalloc objects, or call mtd_device_unregister/memunmap on invalid pointers, reliably causing kernel oops or panic and repeatable denial of service." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/mtd/devices/slram.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "9ee674ab10f755bbedbcbb8e76745d2bb8de88d1", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e97415b8254d9cc131b7bb1c80fcf38123269b9a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f40acf577bb0fb0829f285ecfeb27d817840601c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "200b8bc5b6065b02f3775cf131f14b8e1156a00a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "2fd0cbbb34447ccddab67a2a638a07c6d94cae7a", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "d8dcbbfa0d695a5244059aa34a2e81f3e8df1082", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "bdcdfc2464659789032edfad15ff5f7a166f5d7b", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "36f1648644d769c496a8e47e53603e863e358d73", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/mtd/devices/slram.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.261", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.212", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.178", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.145", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.97", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.40", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.1.5", "lessThanOrEqual": "7.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix" } ] } ], "cpeApplicability": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.261" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.212" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.178" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.145" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.97" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.40" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.1.5" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.2" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/9ee674ab10f755bbedbcbb8e76745d2bb8de88d1" }, { "url": "https://git.kernel.org/stable/c/e97415b8254d9cc131b7bb1c80fcf38123269b9a" }, { "url": "https://git.kernel.org/stable/c/f40acf577bb0fb0829f285ecfeb27d817840601c" }, { "url": "https://git.kernel.org/stable/c/200b8bc5b6065b02f3775cf131f14b8e1156a00a" }, { "url": "https://git.kernel.org/stable/c/2fd0cbbb34447ccddab67a2a638a07c6d94cae7a" }, { "url": "https://git.kernel.org/stable/c/d8dcbbfa0d695a5244059aa34a2e81f3e8df1082" }, { "url": "https://git.kernel.org/stable/c/bdcdfc2464659789032edfad15ff5f7a166f5d7b" }, { "url": "https://git.kernel.org/stable/c/36f1648644d769c496a8e47e53603e863e358d73" } ], "title": "mtd: slram: remove failed entries from the device list", "x_generator": { "engine": "bippy-1.2.0" } } } }