{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2025-38617", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2025-04-16T04:51:24.029Z", "datePublished": "2025-08-22T13:01:23.963Z", "dateUpdated": "2026-08-05T12:03:32.785Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-08-05T12:03:32.785Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nnet/packet: fix a race in packet_set_ring() and packet_notifier()\n\nWhen packet_set_ring() releases po->bind_lock, another thread can\nrun packet_notifier() and process an NETDEV_UP event.\n\nThis race and the fix are both similar to that of commit 15fe076edea7\n(\"net/packet: fix a race in packet_bind() and packet_notifier()\").\n\nThere too the packet_notifier NETDEV_UP event managed to run while a\npo->bind_lock critical section had to be temporarily released. And\nthe fix was similarly to temporarily set po->num to zero to keep\nthe socket unhooked until the lock is retaken.\n\nThe po->bind_lock in packet_set_ring and packet_notifier precede the\nintroduction of git history." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:L - Triggering the race requires local syscalls — creating an AF_PACKET socket, calling setsockopt(PACKET_RX_RING), and generating NETDEV_UP/NETDEV_DOWN events via netlink on a bound device. A remote peer can supply the packet data that lands in the freed ring, but cannot set up the race itself.\nAC:L - The attacker controls both sides of the race — one thread issues the PACKET_RX_RING setsockopt while another flaps the bound interface — and the unlocked window in packet_set_ring() spans a full synchronize_net() RCU grace period, making the race trivially winnable and repeatable.\nPR:L - packet_create() requires only ns_capable(net->user_ns, CAP_NET_RAW), which an unprivileged user obtains with `unshare -Urn`, along with CAP_NET_ADMIN in that namespace to create a veth/dummy device and bring it up and down. Containers with Docker's default capability set (which includes NET_RAW) also reach this directly.\nUI:N - The attacker performs every step — socket setup, ring teardown, interface flap, and packet injection — with no action from any other user.\nS:U - The corruption is confined to kernel memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - tpacket_rcv() operates on the freed pg_vec pages and stale prb_bdqc pointers, and the reclaimed pages remain user-mmapped via packet_mmap(), giving the attacker a read window onto whatever kernel data is reallocated into them — an arbitrary kernel memory disclosure primitive.\nI:H - skb_copy_bits() and prb_fill_curr_block() write attacker-chosen packet contents and block metadata into freed ring pages after free_pg_vec(), yielding a controlled use-after-free write that is heap-sprayable into privilege escalation.\nA:H - In the simplest outcome, packet_lookup_frame() dereferences a NULL rb->pg_vec and test_bit() a NULL rx_owner_map from softirq context, causing an immediate kernel oops/panic that any local user can trigger at will." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "net/packet/af_packet.c" ], "versions": [ { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "18f13f2a83eb81be349a9757ba2141ff1da9ad73", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7da733f117533e9b2ebbd530a22ae4028713955c", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "ba2257034755ae773722f15f4c3ad1dcdad15ca9", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "7de07705007c7e34995a5599aaab1d23e762d7ca", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "88caf46db8239e6471413d28aabaa6b8bd552805", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f2e8fcfd2b1bc754920108b7f2cd75082c5a18df", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "e50ccfaca9e3c671cae917dcb994831a859cf588", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "f1791fd7b845bea0ce9674fcf2febee7bc87a893", "status": "affected", "versionType": "git" }, { "version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "01d3c8417b9c1b884a8a981a3b886da556512f36", "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/packet/af_packet.c" ], "versions": [ { "version": "2.6.12", "status": "affected" }, { "version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver" }, { "version": "5.4.297", "lessThanOrEqual": "5.4.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.241", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.190", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.148", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.102", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.42", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.15.10", "lessThanOrEqual": "6.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.16.1", "lessThanOrEqual": "6.16.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.17", "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": "5.4.297" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.10.241" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "5.15.190" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.1.148" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.102" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12.42" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.15.10" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.16.1" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.17" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/18f13f2a83eb81be349a9757ba2141ff1da9ad73" }, { "url": "https://git.kernel.org/stable/c/7da733f117533e9b2ebbd530a22ae4028713955c" }, { "url": "https://git.kernel.org/stable/c/ba2257034755ae773722f15f4c3ad1dcdad15ca9" }, { "url": "https://git.kernel.org/stable/c/7de07705007c7e34995a5599aaab1d23e762d7ca" }, { "url": "https://git.kernel.org/stable/c/88caf46db8239e6471413d28aabaa6b8bd552805" }, { "url": "https://git.kernel.org/stable/c/f2e8fcfd2b1bc754920108b7f2cd75082c5a18df" }, { "url": "https://git.kernel.org/stable/c/e50ccfaca9e3c671cae917dcb994831a859cf588" }, { "url": "https://git.kernel.org/stable/c/f1791fd7b845bea0ce9674fcf2febee7bc87a893" }, { "url": "https://git.kernel.org/stable/c/01d3c8417b9c1b884a8a981a3b886da556512f36" }, { "url": "https://blog.calif.io/p/a-race-within-a-race-exploiting-cve" }, { "url": "https://github.com/google/security-research/pull/339" } ], "title": "net/packet: fix a race in packet_set_ring() and packet_notifier()", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "title": "CVE Program Container", "references": [ { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00008.html" }, { "url": "https://lists.debian.org/debian-lts-announce/2025/10/msg00007.html" } ], "providerMetadata": { "orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T17:40:28.543Z" } } ] } }