{"id":"CVE-2026-53315","title":"drm/amd/ras: Fix NULL deref in ras_core_get_utc_second_timestamp()","summary":"In the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/ras: Fix NULL deref in ras_core_get_utc_second_timestamp()\n\nras_core_get_utc_second_timestamp() retrieves the current UTC timestamp\n(in seconds since the Unix e…","severity":"none","vendor":"Linux","product":"Linux","affected":["Linux >= 13c91b5b4378b5d08dc9ae9121b1645a0beec0bb < 6c84f7f0afc415691ffa7d48aa7ce1d8e6083032","Linux >= 13c91b5b4378b5d08dc9ae9121b1645a0beec0bb < 2b8101cc3b34d4d80d799360d2744829d5964479","Linux 6.19"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-11-06T16:26:33.059155Z"},"published":"2026-06-26","updated":"2026-11-06","sourceUpdated":"2026-11-06T16:34:20.198Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53315","references":[{"url":"https://git.kernel.org/stable/c/6c84f7f0afc415691ffa7d48aa7ce1d8e6083032"},{"url":"https://git.kernel.org/stable/c/2b8101cc3b34d4d80d799360d2744829d5964479"}],"tags":["cve.org"],"epss":0.00143,"epssPercentile":0.03657,"ingestedAt":"2026-11-06T16:57:43.248Z","slug":"CVE-2026-53315","body":"## Overview\n\nIn the Linux kernel, the following vulnerability has been resolved:\n\ndrm/amd/ras: Fix NULL deref in ras_core_get_utc_second_timestamp()\n\nras_core_get_utc_second_timestamp() retrieves the current UTC timestamp\n(in seconds since the Unix epoch) through a platform-specific RAS system\ncallback and is used for timestamping RAS error events.\n\nThe function checks ras_core in the conditional statement before calling\nthe sys_fn callback. However, when the condition fails, the function\nprints an error message using ras_core->dev.\n\nIf ras_core is NULL, this can lead to a potential NULL pointer\ndereference when accessing ras_core->dev.\n\nAdd an early NULL check for ras_core at the beginning of the function\nand return 0 when the pointer is not valid. This prevents the\ndereference and makes the control flow clearer.\n\n## Affected\n\n- `Linux >= 13c91b5b4378b5d08dc9ae9121b1645a0beec0bb < 6c84f7f0afc415691ffa7d48aa7ce1d8e6083032`\n- `Linux >= 13c91b5b4378b5d08dc9ae9121b1645a0beec0bb < 2b8101cc3b34d4d80d799360d2744829d5964479`\n- `Linux 6.19`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":3,"depthScoreParts":{"impact":2.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}