{"id":"CVE-2025-21773","state":"PUBLISHED","title":"can: etas_es58x: fix potential NULL pointer dereference on udev->serial","description":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: etas_es58x: fix potential NULL pointer dereference on udev->serial\n\nThe driver assumed that es58x_dev->udev->serial could never be NULL.\nWhile this is true on commercially available devices, an attacker\ncould spoof the device identity providing a NULL USB serial number.\nThat would trigger a NULL pointer dereference.\n\nAdd a check on es58x_dev->udev->serial before accessing it.","publishedAt":"2025-02-27T02:18:20.013Z","updatedAt":"2026-05-11T21:06:08.977Z","severity":{"score":5.5,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"1590667a60753ee5a54871f2840ceefd4a7831fa","versionType":"git"},{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"722e8e1219c8b6ac2865011fe339315d6a8d0721","versionType":"git"},{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"5059ea98d7bc133903d3e47ab36df6ed11d0c95f","versionType":"git"},{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"a1ad2109ce41c9e3912dadd07ad8a9c640064ffb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/etas_es58x/es58x_devlink.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.79","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.16","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.4","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/etas_es58x/es58x_devlink.c"]}],"references":["https://git.kernel.org/stable/c/1590667a60753ee5a54871f2840ceefd4a7831fa","https://git.kernel.org/stable/c/722e8e1219c8b6ac2865011fe339315d6a8d0721","https://git.kernel.org/stable/c/5059ea98d7bc133903d3e47ab36df6ed11d0c95f","https://git.kernel.org/stable/c/a1ad2109ce41c9e3912dadd07ad8a9c640064ffb"],"weaknesses":["CWE-476"],"ingestedAt":"2026-10-29T20:08:39.238Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2025/21xxx/CVE-2025-21773.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2025-21773","state":"PUBLISHED","datePublished":"2025-02-27T02:18:20.013Z","dateUpdated":"2026-05-11T21:06:08.977Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-12-29T08:45:45.762Z"},"containers":{"cna":{"title":"can: etas_es58x: fix potential NULL pointer dereference on udev->serial","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\ncan: etas_es58x: fix potential NULL pointer dereference on udev->serial\n\nThe driver assumed that es58x_dev->udev->serial could never be NULL.\nWhile this is true on commercially available devices, an attacker\ncould spoof the device identity providing a NULL USB serial number.\nThat would trigger a NULL pointer dereference.\n\nAdd a check on es58x_dev->udev->serial before accessing it."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"1590667a60753ee5a54871f2840ceefd4a7831fa","versionType":"git"},{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"722e8e1219c8b6ac2865011fe339315d6a8d0721","versionType":"git"},{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"5059ea98d7bc133903d3e47ab36df6ed11d0c95f","versionType":"git"},{"version":"9f06631c3f1f0f298536443df85a6837ba4c5f5c","status":"affected","lessThan":"a1ad2109ce41c9e3912dadd07ad8a9c640064ffb","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/etas_es58x/es58x_devlink.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"6.2","status":"affected"},{"version":"0","status":"unaffected","lessThan":"6.2","versionType":"semver"},{"version":"6.6.79","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.16","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.13.4","status":"unaffected","lessThanOrEqual":"6.13.*","versionType":"semver"},{"version":"6.14","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/can/usb/etas_es58x/es58x_devlink.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/1590667a60753ee5a54871f2840ceefd4a7831fa"},{"url":"https://git.kernel.org/stable/c/722e8e1219c8b6ac2865011fe339315d6a8d0721"},{"url":"https://git.kernel.org/stable/c/5059ea98d7bc133903d3e47ab36df6ed11d0c95f"},{"url":"https://git.kernel.org/stable/c/a1ad2109ce41c9e3912dadd07ad8a9c640064ffb"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T21:06:08.977Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.6.79"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.12.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.13.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"6.2","versionEndExcluding":"6.14"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.5,"attackVector":"LOCAL","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"LOW","availabilityImpact":"HIGH","privilegesRequired":"LOW","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"id":"CVE-2025-21773","role":"CISA Coordinator","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"version":"2.0.3","timestamp":"2025-10-01T19:30:35.613393Z"}}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-476","lang":"en","type":"CWE","description":"CWE-476 NULL Pointer Dereference"}]}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2025-10-01T19:36:40.601Z"}}]}}}