{"id":"CVE-2023-52618","state":"PUBLISHED","title":"block/rnbd-srv: Check for unlikely string overflow","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock/rnbd-srv: Check for unlikely string overflow\n\nSince \"dev_search_path\" can technically be as large as PATH_MAX,\nthere was a risk of truncation when copying it and a second string\ninto \"full_path\" since it was also PATH_MAX sized. The W=1 builds were\nreporting this warning:\n\ndrivers/block/rnbd/rnbd-srv.c: In function 'process_msg_open.isra':\ndrivers/block/rnbd/rnbd-srv.c:616:51: warning: '%s' directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=]\n  616 |                 snprintf(full_path, PATH_MAX, \"%s/%s\",\n      |                                                   ^~\nIn function 'rnbd_srv_get_full_path',\n    inlined from 'process_msg_open.isra' at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: 'snprintf' output between 2 and 4351 bytes into a destination of size 4096\n  616 |                 snprintf(full_path, PATH_MAX, \"%s/%s\",\n      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n  617 |                          dev_search_path, dev_name);\n      |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nTo fix this, unconditionally check for truncation (as was already done\nfor the case where \"%SESSNAME%\" was present).","publishedAt":"2024-03-18T10:19:05.275Z","updatedAt":"2026-05-11T19:30:27.977Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","source":"CISA-ADP"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"95bc866c11974d3e4a9d922275ea8127ff809cf7","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"f6abd5e17da33eba15df2bddc93413e76c2b55f7","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"af7bbdac89739e2e7380387fda598848d3b7010f","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"5b9ea86e662035a886ccb5c76d56793cba618827","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"a2c6206f18104fba7f887bf4dbbfe4c41adc4339","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/rnbd/rnbd-srv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.10.210","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.149","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.77","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.16","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.4","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/rnbd/rnbd-srv.c"]}],"references":["https://git.kernel.org/stable/c/95bc866c11974d3e4a9d922275ea8127ff809cf7","https://git.kernel.org/stable/c/f6abd5e17da33eba15df2bddc93413e76c2b55f7","https://git.kernel.org/stable/c/af7bbdac89739e2e7380387fda598848d3b7010f","https://git.kernel.org/stable/c/5b9ea86e662035a886ccb5c76d56793cba618827","https://git.kernel.org/stable/c/a2c6206f18104fba7f887bf4dbbfe4c41adc4339","https://git.kernel.org/stable/c/9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41","https://lists.debian.org/debian-lts-announce/2024/06/msg00017.html"],"weaknesses":[],"ingestedAt":"2026-10-29T20:06:33.064Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2023/52xxx/CVE-2023-52618.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2023-52618","state":"PUBLISHED","datePublished":"2024-03-18T10:19:05.275Z","dateUpdated":"2026-05-11T19:30:27.977Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2024-03-06T09:52:12.089Z"},"containers":{"cna":{"title":"block/rnbd-srv: Check for unlikely string overflow","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nblock/rnbd-srv: Check for unlikely string overflow\n\nSince \"dev_search_path\" can technically be as large as PATH_MAX,\nthere was a risk of truncation when copying it and a second string\ninto \"full_path\" since it was also PATH_MAX sized. The W=1 builds were\nreporting this warning:\n\ndrivers/block/rnbd/rnbd-srv.c: In function 'process_msg_open.isra':\ndrivers/block/rnbd/rnbd-srv.c:616:51: warning: '%s' directive output may be truncated writing up to 254 bytes into a region of size between 0 and 4095 [-Wformat-truncation=]\n  616 |                 snprintf(full_path, PATH_MAX, \"%s/%s\",\n      |                                                   ^~\nIn function 'rnbd_srv_get_full_path',\n    inlined from 'process_msg_open.isra' at drivers/block/rnbd/rnbd-srv.c:721:14: drivers/block/rnbd/rnbd-srv.c:616:17: note: 'snprintf' output between 2 and 4351 bytes into a destination of size 4096\n  616 |                 snprintf(full_path, PATH_MAX, \"%s/%s\",\n      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~\n  617 |                          dev_search_path, dev_name);\n      |                          ~~~~~~~~~~~~~~~~~~~~~~~~~~\n\nTo fix this, unconditionally check for truncation (as was already done\nfor the case where \"%SESSNAME%\" was present)."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"95bc866c11974d3e4a9d922275ea8127ff809cf7","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"f6abd5e17da33eba15df2bddc93413e76c2b55f7","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"af7bbdac89739e2e7380387fda598848d3b7010f","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"5b9ea86e662035a886ccb5c76d56793cba618827","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"a2c6206f18104fba7f887bf4dbbfe4c41adc4339","versionType":"git"},{"version":"2de6c8de192b9341ffa5e84afe1ce6196d4eef41","status":"affected","lessThan":"9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/rnbd/rnbd-srv.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.8","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.8","versionType":"semver"},{"version":"5.10.210","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.149","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.77","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.16","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.7.4","status":"unaffected","lessThanOrEqual":"6.7.*","versionType":"semver"},{"version":"6.8","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/block/rnbd/rnbd-srv.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/95bc866c11974d3e4a9d922275ea8127ff809cf7"},{"url":"https://git.kernel.org/stable/c/f6abd5e17da33eba15df2bddc93413e76c2b55f7"},{"url":"https://git.kernel.org/stable/c/af7bbdac89739e2e7380387fda598848d3b7010f"},{"url":"https://git.kernel.org/stable/c/5b9ea86e662035a886ccb5c76d56793cba618827"},{"url":"https://git.kernel.org/stable/c/a2c6206f18104fba7f887bf4dbbfe4c41adc4339"},{"url":"https://git.kernel.org/stable/c/9e4bf6a08d1e127bcc4bd72557f2dfafc6bc7f41"}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-05-11T19:30:27.977Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.10.210"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"5.15.149"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.1.77"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.6.16"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.7.4"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.8","versionEndExcluding":"6.8"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA 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