{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-31439", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-03-09T15:48:24.090Z", "datePublished": "2026-04-22T13:53:37.754Z", "dateUpdated": "2026-05-11T22:08:43.715Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-05-11T22:08:43.715Z"}, "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: xilinx: xdma: Fix regmap init error handling\n\ndevm_regmap_init_mmio returns an ERR_PTR() upon error, not NULL.\nFix the error check and also fix the error message. Use the error code\nfrom ERR_PTR() instead of the wrong value in ret."}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["drivers/dma/xilinx/xdma.c"], "versions": [{"version": "17ce252266c7f016ece026492c45838f852ddc79", "lessThan": "4b6e1da50b22e5528b9003f376a3cecccce4decc", "status": "affected", "versionType": "git"}, {"version": "17ce252266c7f016ece026492c45838f852ddc79", "lessThan": "9787b3d9b908785b40bc3f2e6d7082fdb8fdd98a", "status": "affected", "versionType": "git"}, {"version": "17ce252266c7f016ece026492c45838f852ddc79", "lessThan": "f27197ccfd2ecd2c71f27fd57c6d507e892ad24d", "status": "affected", "versionType": "git"}, {"version": "17ce252266c7f016ece026492c45838f852ddc79", "lessThan": "59f6ccd0f3345be2e8a78bdef2103e93f180633a", "status": "affected", "versionType": "git"}, {"version": "17ce252266c7f016ece026492c45838f852ddc79", "lessThan": "e0adbf74e2a0455a6bc9628726ba87bcd0b42bf8", "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/dma/xilinx/xdma.c"], "versions": [{"version": "6.3", "status": "affected"}, {"version": "0", "lessThan": "6.3", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.131", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.80", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.21", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.11", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0", "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": "6.3", "versionEndExcluding": "6.6.131"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.12.80"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.18.21"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "6.19.11"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "6.3", "versionEndExcluding": "7.0"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/4b6e1da50b22e5528b9003f376a3cecccce4decc"}, {"url": "https://git.kernel.org/stable/c/9787b3d9b908785b40bc3f2e6d7082fdb8fdd98a"}, {"url": "https://git.kernel.org/stable/c/f27197ccfd2ecd2c71f27fd57c6d507e892ad24d"}, {"url": "https://git.kernel.org/stable/c/59f6ccd0f3345be2e8a78bdef2103e93f180633a"}, {"url": "https://git.kernel.org/stable/c/e0adbf74e2a0455a6bc9628726ba87bcd0b42bf8"}], "title": "dmaengine: xilinx: xdma: Fix regmap init error handling", "x_generator": {"engine": "bippy-1.2.0"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ndmaengine: xilinx: xdma: Fix regmap init error handling\n\ndevm_regmap_init_mmio returns an ERR_PTR() upon error, not NULL.\nFix the error check and also fix the error message. Use the error code\nfrom ERR_PTR() instead of the wrong value in ret."}], "id": "CVE-2026-31439", "lastModified": "2026-04-23T16:17:41.280", "metrics": {}, "published": "2026-04-22T14:16:37.240", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/4b6e1da50b22e5528b9003f376a3cecccce4decc"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/59f6ccd0f3345be2e8a78bdef2103e93f180633a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/9787b3d9b908785b40bc3f2e6d7082fdb8fdd98a"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e0adbf74e2a0455a6bc9628726ba87bcd0b42bf8"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/f27197ccfd2ecd2c71f27fd57c6d507e892ad24d"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Awaiting Analysis"}

{"bugzilla": {"description": "kernel: dmaengine: xilinx: xdma: Fix regmap init error handling", "id": "2460726", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2460726"}, "csaw": false, "cwe": "CWE-390", "details": ["A flaw was found in the Linux kernel's Xilinx DMA (Direct Memory Access) engine. The xdma driver's regmap initialization incorrectly handled errors, specifically when the devm_regmap_init_mmio function returned an error pointer instead of a null value. This improper error handling could potentially lead to system instability or resource exhaustion under specific error conditions."], "name": "CVE-2026-31439", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:10", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 10"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2026-04-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-31439\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-31439\nhttps://lore.kernel.org/linux-cve-announce/2026042243-CVE-2026-31439-b890@gregkh/T"]}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17ce252266c7f016ece026492c45838f852ddc79,4b6e1da50b22e5528b9003f376a3cecccce4decc)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17ce252266c7f016ece026492c45838f852ddc79,9787b3d9b908785b40bc3f2e6d7082fdb8fdd98a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17ce252266c7f016ece026492c45838f852ddc79,f27197ccfd2ecd2c71f27fd57c6d507e892ad24d)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17ce252266c7f016ece026492c45838f852ddc79,59f6ccd0f3345be2e78bdef2103e93f180633a)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[17ce252266c7f016ece026492c45838f852ddc79,e0adbf74e2a0455a6bc9628726ba87bcd0b42bf8)"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "6.3"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[0,6.3)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.6.131,6.7.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.12.80,6.13.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.18.21,6.19.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "semver", "value": "[6.19.11,6.20.0)"}}, {"platform": null, "status": "unaffected", "versions": {"scheme": "generic", "value": "[7.0,*]"}}], "enrichment": {"confidence": 99.0, "confidence_source": "inferred", "scores": [{"score": 99.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "Linux", "source": "cna", "vendor": "Linux"}, "product": "linux_kernel", "vendor": "linux"}], "analysis": {"en": {"generated_at": "2026-04-29T00:16:04.901799+00:00", "value": {"mitigation_remediation": ["Apply a kernel update that includes the regmap initialization fix for the Xilinx XDMA driver or build a custom kernel with the updated source", "Reboot the system after applying the kernel update to ensure the updated driver is loaded", "If the kernel cannot be updated immediately, disable the Xilinx XDMA module or prevent related hardware from being accessed until the patch is applied"], "summary": {"action": "Apply the fix", "impact": "Improper error handling in the Xilinx XDMA DMA engine driver can lead to kernel instability"}, "threat_synthesis": {"affected_systems": "All Linux kernel releases that contain the Xilinx XDMA driver prior to the application of the fix. The driver is part of the core kernel source, so any distribution that ships the unpatched kernel is potentially affected. No specific version ranges are listed, but the patch was applied to the stable kernel branches in early 2026.", "description_and_impact": "The vulnerability originates from a failure to correctly interpret the return value of the regmap initialization routine in the Xilinx XDMA driver. The code checks for a NULL pointer while the kernel API returns an ERR_PTR error value. As a result, the error is not detected, and the driver can attempt to use an invalid regmap, potentially causing crashes or inconsistent kernel state. This issue is purely a reliability problem; the CVE description does not indicate any rapid code execution or data disclosure. However, the incorrect handling of the error is a direct result of a failure in error checking logic, making the weakness attributable to \"Improper Error Handling\" (CWE\u2011390).", "risk_and_exploitability": "The EPSS score is below 1\u202f%, and the vulnerability is not listed in the CISA KEV catalog, indicating a low probability of exploitation. The flaw requires local kernel access, and there is no direct remote attack surface; this requirement is inferred from the fact that only code running in kernel mode can provoke the error. The risk is therefore focused on service disruption or system instability when the Xilinx DMA hardware is accessed, rather than data compromise or remote code execution."}}}}, "created": "2026-04-22T20:30:26.554863+00:00", "updated": "2026-04-29T00:30:16.110394+00:00", "vendors": ["linux", "linux$PRODUCT$linux_kernel"]}