221 lines
10 KiB
JSON
221 lines
10 KiB
JSON
{
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"dataType": "CVE_RECORD",
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"dataVersion": "5.2",
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"cveMetadata": {
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"cveId": "CVE-2025-21820",
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"assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"state": "PUBLISHED",
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"assignerShortName": "Linux",
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"dateReserved": "2024-12-29T08:45:45.775Z",
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"datePublished": "2025-02-27T20:04:17.930Z",
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"dateUpdated": "2026-05-11T21:07:09.122Z"
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},
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"containers": {
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"cna": {
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"providerMetadata": {
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"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
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"shortName": "Linux",
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"dateUpdated": "2026-05-11T21:07:09.122Z"
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},
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"descriptions": [
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{
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"lang": "en",
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"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."
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}
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],
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"affected": [
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "unaffected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/tty/serial/xilinx_uartps.c"
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],
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"versions": [
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{
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"version": "74ea66d4ca061a3cd4c0e924e51b60e924644852",
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"lessThan": "e22a97700901ba5e8bf8db68056a0d50f9440cae",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "74ea66d4ca061a3cd4c0e924e51b60e924644852",
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"lessThan": "de5bd24197bd9ee37ec1e379a3d882bbd15c5065",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "74ea66d4ca061a3cd4c0e924e51b60e924644852",
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"lessThan": "8ea0e7b3d7b8f2f0fc9db491ff22a0abe120801c",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "74ea66d4ca061a3cd4c0e924e51b60e924644852",
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"lessThan": "9b88a7c4584ba67267a051069b8abe44fc9595b2",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "74ea66d4ca061a3cd4c0e924e51b60e924644852",
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"lessThan": "4410dba9807a17a93f649a9f5870ceaf30a675a3",
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"status": "affected",
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"versionType": "git"
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},
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{
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"version": "74ea66d4ca061a3cd4c0e924e51b60e924644852",
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"lessThan": "b06f388994500297bb91be60ffaf6825ecfd2afe",
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"status": "affected",
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"versionType": "git"
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}
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]
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},
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{
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"product": "Linux",
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"vendor": "Linux",
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"defaultStatus": "affected",
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"repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
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"programFiles": [
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"drivers/tty/serial/xilinx_uartps.c"
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],
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"versions": [
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{
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"version": "4.6",
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"status": "affected"
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},
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{
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"version": "0",
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"lessThan": "4.6",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "5.15.179",
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"lessThanOrEqual": "5.15.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.1.129",
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"lessThanOrEqual": "6.1.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.6.78",
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"lessThanOrEqual": "6.6.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.12.14",
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"lessThanOrEqual": "6.12.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.13.3",
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"lessThanOrEqual": "6.13.*",
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"status": "unaffected",
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"versionType": "semver"
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},
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{
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"version": "6.14",
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"lessThanOrEqual": "*",
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"status": "unaffected",
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"versionType": "original_commit_for_fix"
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}
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]
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}
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],
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"cpeApplicability": [
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{
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"nodes": [
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{
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"operator": "OR",
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"negate": false,
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"cpeMatch": [
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.6",
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"versionEndExcluding": "5.15.179"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.6",
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"versionEndExcluding": "6.1.129"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.6",
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"versionEndExcluding": "6.6.78"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.6",
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"versionEndExcluding": "6.12.14"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.6",
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"versionEndExcluding": "6.13.3"
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},
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{
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"vulnerable": true,
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"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
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"versionStartIncluding": "4.6",
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"versionEndExcluding": "6.14"
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}
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]
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}
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]
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}
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],
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"references": [
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{
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"url": "https://git.kernel.org/stable/c/e22a97700901ba5e8bf8db68056a0d50f9440cae"
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},
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{
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"url": "https://git.kernel.org/stable/c/de5bd24197bd9ee37ec1e379a3d882bbd15c5065"
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},
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{
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"url": "https://git.kernel.org/stable/c/8ea0e7b3d7b8f2f0fc9db491ff22a0abe120801c"
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},
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{
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"url": "https://git.kernel.org/stable/c/9b88a7c4584ba67267a051069b8abe44fc9595b2"
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},
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{
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"url": "https://git.kernel.org/stable/c/4410dba9807a17a93f649a9f5870ceaf30a675a3"
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},
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{
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"url": "https://git.kernel.org/stable/c/b06f388994500297bb91be60ffaf6825ecfd2afe"
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}
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],
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"title": "tty: xilinx_uartps: split sysrq handling",
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"x_generator": {
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"engine": "bippy-1.2.0"
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}
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},
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"adp": [
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{
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"title": "CVE Program Container",
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"references": [
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{
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"url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00028.html"
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}
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],
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"providerMetadata": {
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"orgId": "af854a3a-2127-422b-91ae-364da2661108",
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"shortName": "CVE",
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"dateUpdated": "2025-11-03T20:59:53.209Z"
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}
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}
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]
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}
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} |