{"id":"CVE-2026-46191","state":"PUBLISHED","title":"fbcon: Avoid OOB font access if console rotation fails","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: Avoid OOB font access if console rotation fails\n\nClear the font buffer if the reallocation during console rotation fails\nin fbcon_rotate_font(). The putcs implementations for the rotated buffer\nwill return early in this case. See [1] for an example.\n\nCurrently, fbcon_rotate_font() keeps the old buffer, which is too small\nfor the rotated font. Printing to the rotated console with a high-enough\ncharacter code will overflow the font buffer.\n\nv2:\n- fix typos in commit message","publishedAt":"2026-05-28T09:36:44.961Z","updatedAt":"2026-10-15T01:21:13.270Z","severity":null,"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"b51c343a81e6e806525a4435e22532c107dd7e9d","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"46cf3646dea54baeaa2eafe3fb1ba769947f31b0","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"524a6079395916fb3d790ef2bb46a1d2939b27dd","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"594973a2e54924d8ba31c9faac669fc1ba6fcb80","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"ab6c34b9829d5de03f1d08a47a2253729a6e7e27","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"7105d9f1387d63b15c9a860674fc92c959181f2f","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"b44cc78ff46b96e72d333a3be6aaaa0a14797263","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"e4ef723d8975a2694cc90733a6b888a5e2841842","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/core/fbcon_rotate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.15","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/core/fbcon_rotate.c"]}],"references":["https://git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9d","https://git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0","https://git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27dd","https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80","https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27","https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f","https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263","https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842","https://cert-portal.siemens.com/productcert/html/ssa-784472.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:12:07.131Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/46xxx/CVE-2026-46191.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-46191","state":"PUBLISHED","datePublished":"2026-05-28T09:36:44.961Z","dateUpdated":"2026-10-15T01:21:13.270Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-05-13T15:03:33.104Z"},"containers":{"cna":{"title":"fbcon: Avoid OOB font access if console rotation fails","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nfbcon: Avoid OOB font access if console rotation fails\n\nClear the font buffer if the reallocation during console rotation fails\nin fbcon_rotate_font(). The putcs implementations for the rotated buffer\nwill return early in this case. See [1] for an example.\n\nCurrently, fbcon_rotate_font() keeps the old buffer, which is too small\nfor the rotated font. Printing to the rotated console with a high-enough\ncharacter code will overflow the font buffer.\n\nv2:\n- fix typos in commit message"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"b51c343a81e6e806525a4435e22532c107dd7e9d","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"46cf3646dea54baeaa2eafe3fb1ba769947f31b0","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"524a6079395916fb3d790ef2bb46a1d2939b27dd","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"594973a2e54924d8ba31c9faac669fc1ba6fcb80","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"ab6c34b9829d5de03f1d08a47a2253729a6e7e27","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"7105d9f1387d63b15c9a860674fc92c959181f2f","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"b44cc78ff46b96e72d333a3be6aaaa0a14797263","versionType":"git"},{"version":"6cc50e1c5b57180fd37a31282000f43859b0fe73","status":"affected","lessThan":"e4ef723d8975a2694cc90733a6b888a5e2841842","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/core/fbcon_rotate.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"2.6.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"2.6.15","versionType":"semver"},{"version":"5.10.259","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.210","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.176","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.140","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.90","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.32","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.0.7","status":"unaffected","lessThanOrEqual":"7.0.*","versionType":"semver"},{"version":"7.1","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/video/fbdev/core/fbcon_rotate.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/b51c343a81e6e806525a4435e22532c107dd7e9d"},{"url":"https://git.kernel.org/stable/c/46cf3646dea54baeaa2eafe3fb1ba769947f31b0"},{"url":"https://git.kernel.org/stable/c/524a6079395916fb3d790ef2bb46a1d2939b27dd"},{"url":"https://git.kernel.org/stable/c/594973a2e54924d8ba31c9faac669fc1ba6fcb80"},{"url":"https://git.kernel.org/stable/c/ab6c34b9829d5de03f1d08a47a2253729a6e7e27"},{"url":"https://git.kernel.org/stable/c/7105d9f1387d63b15c9a860674fc92c959181f2f"},{"url":"https://git.kernel.org/stable/c/b44cc78ff46b96e72d333a3be6aaaa0a14797263"},{"url":"https://git.kernel.org/stable/c/e4ef723d8975a2694cc90733a6b888a5e2841842"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-06-19T11:59:53.468Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.10.259"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"5.15.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.1.176"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.6.140"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.12.90"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"6.18.32"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"7.0.7"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"2.6.15","versionEndExcluding":"7.1"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"affected":[{"vendor":"Siemens","product":"SIMATIC S7-1500 TM MFP - 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