| { |
| "containers": { |
| "cna": { |
| "providerMetadata": { |
| "orgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038" |
| }, |
| "descriptions": [ |
| { |
| "lang": "en", |
| "value": "In the Linux kernel, the following vulnerability has been resolved:\n\ntty: xilinx_uartps: split sysrq handling\n\nlockdep detects the following circular locking dependency:\n\nCPU 0 CPU 1\n========================== ============================\ncdns_uart_isr() printk()\n uart_port_lock(port) console_lock()\n\t\t\t cdns_uart_console_write()\n if (!port->sysrq)\n uart_port_lock(port)\n uart_handle_break()\n port->sysrq = ...\n uart_handle_sysrq_char()\n printk()\n console_lock()\n\nThe fixed commit attempts to avoid this situation by only taking the\nport lock in cdns_uart_console_write if port->sysrq unset. However, if\n(as shown above) cdns_uart_console_write runs before port->sysrq is set,\nthen it will try to take the port lock anyway. This may result in a\ndeadlock.\n\nFix this by splitting sysrq handling into two parts. We use the prepare\nhelper under the port lock and defer handling until we release the lock." |
| } |
| ], |
| "affected": [ |
| { |
| "product": "Linux", |
| "vendor": "Linux", |
| "defaultStatus": "unaffected", |
| "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", |
| "programFiles": [ |
| "drivers/tty/serial/xilinx_uartps.c" |
| ], |
| "versions": [ |
| { |
| "version": "74ea66d4ca061a3cd4c0e924e51b60e924644852", |
| "lessThan": "e22a97700901ba5e8bf8db68056a0d50f9440cae", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74ea66d4ca061a3cd4c0e924e51b60e924644852", |
| "lessThan": "de5bd24197bd9ee37ec1e379a3d882bbd15c5065", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74ea66d4ca061a3cd4c0e924e51b60e924644852", |
| "lessThan": "8ea0e7b3d7b8f2f0fc9db491ff22a0abe120801c", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74ea66d4ca061a3cd4c0e924e51b60e924644852", |
| "lessThan": "9b88a7c4584ba67267a051069b8abe44fc9595b2", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74ea66d4ca061a3cd4c0e924e51b60e924644852", |
| "lessThan": "4410dba9807a17a93f649a9f5870ceaf30a675a3", |
| "status": "affected", |
| "versionType": "git" |
| }, |
| { |
| "version": "74ea66d4ca061a3cd4c0e924e51b60e924644852", |
| "lessThan": "b06f388994500297bb91be60ffaf6825ecfd2afe", |
| "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/tty/serial/xilinx_uartps.c" |
| ], |
| "versions": [ |
| { |
| "version": "4.6", |
| "status": "affected" |
| }, |
| { |
| "version": "0", |
| "lessThan": "4.6", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "5.15.179", |
| "lessThanOrEqual": "5.15.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.1.129", |
| "lessThanOrEqual": "6.1.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.6.78", |
| "lessThanOrEqual": "6.6.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.12.14", |
| "lessThanOrEqual": "6.12.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.13.3", |
| "lessThanOrEqual": "6.13.*", |
| "status": "unaffected", |
| "versionType": "semver" |
| }, |
| { |
| "version": "6.14", |
| "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": "4.6", |
| "versionEndExcluding": "5.15.179" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.6", |
| "versionEndExcluding": "6.1.129" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.6", |
| "versionEndExcluding": "6.6.78" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.6", |
| "versionEndExcluding": "6.12.14" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.6", |
| "versionEndExcluding": "6.13.3" |
| }, |
| { |
| "vulnerable": true, |
| "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", |
| "versionStartIncluding": "4.6", |
| "versionEndExcluding": "6.14" |
| } |
| ] |
| } |
| ] |
| } |
| ], |
| "references": [ |
| { |
| "url": "https://git.kernel.org/stable/c/e22a97700901ba5e8bf8db68056a0d50f9440cae" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/de5bd24197bd9ee37ec1e379a3d882bbd15c5065" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/8ea0e7b3d7b8f2f0fc9db491ff22a0abe120801c" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/9b88a7c4584ba67267a051069b8abe44fc9595b2" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/4410dba9807a17a93f649a9f5870ceaf30a675a3" |
| }, |
| { |
| "url": "https://git.kernel.org/stable/c/b06f388994500297bb91be60ffaf6825ecfd2afe" |
| } |
| ], |
| "title": "tty: xilinx_uartps: split sysrq handling", |
| "x_generator": { |
| "engine": "bippy-1.2.0" |
| } |
| } |
| }, |
| "cveMetadata": { |
| "assignerOrgId": "f4215fc3-5b6b-47ff-a258-f7189bd81038", |
| "cveID": "CVE-2025-21820", |
| "requesterUserId": "gregkh@kernel.org", |
| "serial": "1", |
| "state": "PUBLISHED" |
| }, |
| "dataType": "CVE_RECORD", |
| "dataVersion": "5.0" |
| } |
