{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-23460", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-01-13T15:37:46.021Z", "datePublished": "2026-04-03T15:15:40.364Z", "dateUpdated": "2026-04-03T15:15:40.364Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-04-03T15:15:40.364Z"}, "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"}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rose/af_rose.c"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0c9fb70a206a8734e10468ecc24d57c7596cf64e", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "508f49ccbe0329641bb681f7d0052bb4e5943252", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "0c3e8bff808f17ad37a51d8e719eed22c7863120", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "a12254050e3050f1011cd24f3b880a6882d0139d", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e1f0a18c9564cdb16523c802e2c6fe5874e3d944", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["net/rose/af_rose.c"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.1.167", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.130", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12.78", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.18.20", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.19.10", "lessThanOrEqual": "6.19.*", "status": "unaffected", "versionType": "semver"}, {"version": "7.0-rc5", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.167"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.130"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.78"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.18.20"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.19.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "7.0-rc5"}]}]}], "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"}}}}

{}

{"cveTags": [], "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"}], "id": "CVE-2026-23460", "lastModified": "2026-04-03T16:16:32.963", "metrics": {}, "published": "2026-04-03T16:16:32.963", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c3e8bff808f17ad37a51d8e719eed22c7863120"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/0c9fb70a206a8734e10468ecc24d57c7596cf64e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/508f49ccbe0329641bb681f7d0052bb4e5943252"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/a12254050e3050f1011cd24f3b880a6882d0139d"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/c2ab74c12932e52cfa1e7e4582d42b0c8bec96c7"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "url": "https://git.kernel.org/stable/c/e1f0a18c9564cdb16523c802e2c6fe5874e3d944"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Received"}

{}

{}