{"api_version":"1","generated_at":"2026-04-16T23:42:50+00:00","cve":"CVE-2026-23460","urls":{"html":"https://cve.report/CVE-2026-23460","api":"https://cve.report/api/cve/CVE-2026-23460.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-23460","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-23460"},"summary":{"title":"net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rose: fix NULL pointer dereference in rose_transmit_link on reconnect\n\nsyzkaller reported a bug [1], and the reproducer is available at [2].\n\nROSE sockets use four sk->sk_state values: TCP_CLOSE, TCP_LISTEN,\nTCP_SYN_SENT, and TCP_ESTABLISHED. rose_connect() already rejects\ncalls for TCP_ESTABLISHED (-EISCONN) and TCP_CLOSE with SS_CONNECTING\n(-ECONNREFUSED), but lacks a check for TCP_SYN_SENT.\n\nWhen rose_connect() is called a second time while the first connection\nattempt is still in progress (TCP_SYN_SENT), it overwrites\nrose->neighbour via rose_get_neigh(). If that returns NULL, the socket\nis left with rose->state == ROSE_STATE_1 but rose->neighbour == NULL.\nWhen the socket is subsequently closed, rose_release() sees\nROSE_STATE_1 and calls rose_write_internal() ->\nrose_transmit_link(skb, NULL), causing a NULL pointer dereference.\n\nPer connect(2), a second connect() while a connection is already in\nprogress should return -EALREADY. Add this missing check for\nTCP_SYN_SENT to complete the state validation in rose_connect().\n\n[1] https://syzkaller.appspot.com/bug?extid=d00f90e0af54102fb271\n[2] https://gist.github.com/mrpre/9e6779e0d13e2c66779b1653fef80516","state":"PUBLISHED","assigner":"Linux","published_at":"2026-04-03 16:16:32","updated_at":"2026-04-07 13:21:09"},"problem_types":[],"metrics":[],"references":[{"url":"https://git.kernel.org/stable/c/e1f0a18c9564cdb16523c802e2c6fe5874e3d944","name":"https://git.kernel.org/stable/c/e1f0a18c9564cdb16523c802e2c6fe5874e3d944","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0c3e8bff808f17ad37a51d8e719eed22c7863120","name":"https://git.kernel.org/stable/c/0c3e8bff808f17ad37a51d8e719eed22c7863120","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7","name":"https://git.kernel.org/stable/c/c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/a12254050e3050f1011cd24f3b880a6882d0139d","name":"https://git.kernel.org/stable/c/a12254050e3050f1011cd24f3b880a6882d0139d","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/508f49ccbe0329641bb681f7d0052bb4e5943252","name":"https://git.kernel.org/stable/c/508f49ccbe0329641bb681f7d0052bb4e5943252","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://git.kernel.org/stable/c/0c9fb70a206a8734e10468ecc24d57c7596cf64e","name":"https://git.kernel.org/stable/c/0c9fb70a206a8734e10468ecc24d57c7596cf64e","refsource":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-23460","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-23460","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 0c9fb70a206a8734e10468ecc24d57c7596cf64e git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 508f49ccbe0329641bb681f7d0052bb4e5943252 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 0c3e8bff808f17ad37a51d8e719eed22c7863120 git","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"affected 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6.19.10 6.19.* semver","platforms":[]},{"source":"CNA","vendor":"Linux","product":"Linux","version":"unaffected 7.0-rc5 * original_commit_for_fix","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"23460","cve":"CVE-2026-23460","epss":"0.000240000","percentile":"0.066190000","score_date":"2026-04-07","updated_at":"2026-04-08 00:03:39"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"defaultStatus":"unaffected","product":"Linux","programFiles":["net/rose/af_rose.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"lessThan":"c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"0c9fb70a206a8734e10468ecc24d57c7596cf64e","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"508f49ccbe0329641bb681f7d0052bb4e5943252","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"0c3e8bff808f17ad37a51d8e719eed22c7863120","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"a12254050e3050f1011cd24f3b880a6882d0139d","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"},{"lessThan":"e1f0a18c9564cdb16523c802e2c6fe5874e3d944","status":"affected","version":"1da177e4c3f41524e886b7f1b8a0c1fc7321cac2","versionType":"git"}]},{"defaultStatus":"affected","product":"Linux","programFiles":["net/rose/af_rose.c"],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","vendor":"Linux","versions":[{"status":"affected","version":"2.6.12"},{"lessThan":"2.6.12","status":"unaffected","version":"0","versionType":"semver"},{"lessThanOrEqual":"6.1.*","status":"unaffected","version":"6.1.167","versionType":"semver"},{"lessThanOrEqual":"6.6.*","status":"unaffected","version":"6.6.130","versionType":"semver"},{"lessThanOrEqual":"6.12.*","status":"unaffected","version":"6.12.78","versionType":"semver"},{"lessThanOrEqual":"6.18.*","status":"unaffected","version":"6.18.20","versionType":"semver"},{"lessThanOrEqual":"6.19.*","status":"unaffected","version":"6.19.10","versionType":"semver"},{"lessThanOrEqual":"*","status":"unaffected","version":"7.0-rc5","versionType":"original_commit_for_fix"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.1.167","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.6.130","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.12.78","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.18.20","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"6.19.10","versionStartIncluding":"2.6.12","vulnerable":true},{"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionEndExcluding":"7.0-rc5","versionStartIncluding":"2.6.12","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rose: fix NULL pointer dereference in rose_transmit_link on reconnect\n\nsyzkaller reported a bug [1], and the reproducer is available at [2].\n\nROSE sockets use four sk->sk_state values: TCP_CLOSE, TCP_LISTEN,\nTCP_SYN_SENT, and TCP_ESTABLISHED. rose_connect() already rejects\ncalls for TCP_ESTABLISHED (-EISCONN) and TCP_CLOSE with SS_CONNECTING\n(-ECONNREFUSED), but lacks a check for TCP_SYN_SENT.\n\nWhen rose_connect() is called a second time while the first connection\nattempt is still in progress (TCP_SYN_SENT), it overwrites\nrose->neighbour via rose_get_neigh(). If that returns NULL, the socket\nis left with rose->state == ROSE_STATE_1 but rose->neighbour == NULL.\nWhen the socket is subsequently closed, rose_release() sees\nROSE_STATE_1 and calls rose_write_internal() ->\nrose_transmit_link(skb, NULL), causing a NULL pointer dereference.\n\nPer connect(2), a second connect() while a connection is already in\nprogress should return -EALREADY. Add this missing check for\nTCP_SYN_SENT to complete the state validation in rose_connect().\n\n[1] https://syzkaller.appspot.com/bug?extid=d00f90e0af54102fb271\n[2] https://gist.github.com/mrpre/9e6779e0d13e2c66779b1653fef80516"}],"providerMetadata":{"dateUpdated":"2026-04-03T15:15:40.364Z","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","shortName":"Linux"},"references":[{"url":"https://git.kernel.org/stable/c/c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7"},{"url":"https://git.kernel.org/stable/c/0c9fb70a206a8734e10468ecc24d57c7596cf64e"},{"url":"https://git.kernel.org/stable/c/508f49ccbe0329641bb681f7d0052bb4e5943252"},{"url":"https://git.kernel.org/stable/c/0c3e8bff808f17ad37a51d8e719eed22c7863120"},{"url":"https://git.kernel.org/stable/c/a12254050e3050f1011cd24f3b880a6882d0139d"},{"url":"https://git.kernel.org/stable/c/e1f0a18c9564cdb16523c802e2c6fe5874e3d944"}],"title":"net/rose: fix NULL pointer dereference in rose_transmit_link on reconnect","x_generator":{"engine":"bippy-1.2.0"}}},"cveMetadata":{"assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","assignerShortName":"Linux","cveId":"CVE-2026-23460","datePublished":"2026-04-03T15:15:40.364Z","dateReserved":"2026-01-13T15:37:46.021Z","dateUpdated":"2026-04-03T15:15:40.364Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-04-03 16:16:32","lastModifiedDate":"2026-04-07 13:21:09","problem_types":[],"metrics":[],"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"23460","Ordinal":"1","Title":"net/rose: fix NULL pointer dereference in rose_transmit_link on ","CVE":"CVE-2026-23460","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"23460","Ordinal":"1","NoteData":"In the Linux kernel, the following vulnerability has been resolved:\n\nnet/rose: fix NULL pointer dereference in rose_transmit_link on reconnect\n\nsyzkaller reported a bug [1], and the reproducer is available at [2].\n\nROSE sockets use four sk->sk_state values: TCP_CLOSE, TCP_LISTEN,\nTCP_SYN_SENT, and TCP_ESTABLISHED. rose_connect() already rejects\ncalls for TCP_ESTABLISHED (-EISCONN) and TCP_CLOSE with SS_CONNECTING\n(-ECONNREFUSED), but lacks a check for TCP_SYN_SENT.\n\nWhen rose_connect() is called a second time while the first connection\nattempt is still in progress (TCP_SYN_SENT), it overwrites\nrose->neighbour via rose_get_neigh(). If that returns NULL, the socket\nis left with rose->state == ROSE_STATE_1 but rose->neighbour == NULL.\nWhen the socket is subsequently closed, rose_release() sees\nROSE_STATE_1 and calls rose_write_internal() ->\nrose_transmit_link(skb, NULL), causing a NULL pointer dereference.\n\nPer connect(2), a second connect() while a connection is already in\nprogress should return -EALREADY. Add this missing check for\nTCP_SYN_SENT to complete the state validation in rose_connect().\n\n[1] https://syzkaller.appspot.com/bug?extid=d00f90e0af54102fb271\n[2] https://gist.github.com/mrpre/9e6779e0d13e2c66779b1653fef80516","Type":"Description","Title":"net/rose: fix NULL pointer dereference in rose_transmit_link on "}]}}}