{"id":"CVE-2026-98381","state":"PUBLISHED","title":"veth: manage XDP program pointers during channel resize","description":"In the Linux kernel, the following vulnerability has been resolved:\n\nveth: manage XDP program pointers during channel resize\n\nveth_set_channels() tears down XDP resources for removed RX queues\nwithout clearing rq->xdp_prog.  If the program is then detached or\nreplaced, those queues keep the old pointer after bpf_prog_put().\nA later channel increase can re-enable NAPI and run the freed program.\n\n  BUG: unable to handle page fault for address: ffffc90000256048\n  Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n  RIP: veth_xdp_rcv_skb (include/linux/filter.h:779\n                         include/net/xdp.h:696 drivers/net/veth.c:820)\n  Call Trace:\n   veth_xdp_rcv (drivers/net/veth.c:941)\n   veth_poll (drivers/net/veth.c:986)\n   __napi_poll (net/core/dev.c:7787)\n   net_rx_action (net/core/dev.c:7850 net/core/dev.c:8007)\n   handle_softirqs (kernel/softirq.c:645)\n  Kernel panic - not syncing: Fatal exception in interrupt","publishedAt":"2026-10-09T07:34:21.029Z","updatedAt":"2026-10-24T14:08:38.193Z","severity":{"score":7.8,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"7a8e143109ff2736dc79e41dcd55af7ceab7520a","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"1a5c5b9c64ba5f39dba55da6e12561ca56eeb758","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"25bb7c36225220d30f404d7e29d2e052bc5f4b99","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"43f6b647f209591b1e3f726bb16b8dcba6b95908","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"7104a370714346b667712913dc16abf14bbc97ed","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/veth.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/veth.c"]}],"references":["https://git.kernel.org/stable/c/7a8e143109ff2736dc79e41dcd55af7ceab7520a","https://git.kernel.org/stable/c/1a5c5b9c64ba5f39dba55da6e12561ca56eeb758","https://git.kernel.org/stable/c/f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6","https://git.kernel.org/stable/c/3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9","https://git.kernel.org/stable/c/25bb7c36225220d30f404d7e29d2e052bc5f4b99","https://git.kernel.org/stable/c/43f6b647f209591b1e3f726bb16b8dcba6b95908","https://git.kernel.org/stable/c/7104a370714346b667712913dc16abf14bbc97ed"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:43.249Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/98xxx/CVE-2026-98381.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-98381","state":"PUBLISHED","datePublished":"2026-10-09T07:34:21.029Z","dateUpdated":"2026-10-24T14:08:38.193Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-25T10:25:14.345Z"},"containers":{"cna":{"title":"veth: manage XDP program pointers during channel resize","descriptions":[{"lang":"en","value":"In the Linux kernel, the following vulnerability has been resolved:\n\nveth: manage XDP program pointers during channel resize\n\nveth_set_channels() tears down XDP resources for removed RX queues\nwithout clearing rq->xdp_prog.  If the program is then detached or\nreplaced, those queues keep the old pointer after bpf_prog_put().\nA later channel increase can re-enable NAPI and run the freed program.\n\n  BUG: unable to handle page fault for address: ffffc90000256048\n  Oops: Oops: 0000 [#1] SMP KASAN NOPTI\n  RIP: veth_xdp_rcv_skb (include/linux/filter.h:779\n                         include/net/xdp.h:696 drivers/net/veth.c:820)\n  Call Trace:\n   veth_xdp_rcv (drivers/net/veth.c:941)\n   veth_poll (drivers/net/veth.c:986)\n   __napi_poll (net/core/dev.c:7787)\n   net_rx_action (net/core/dev.c:7850 net/core/dev.c:8007)\n   handle_softirqs (kernel/softirq.c:645)\n  Kernel panic - not syncing: Fatal exception in interrupt"}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"7a8e143109ff2736dc79e41dcd55af7ceab7520a","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"1a5c5b9c64ba5f39dba55da6e12561ca56eeb758","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"25bb7c36225220d30f404d7e29d2e052bc5f4b99","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"43f6b647f209591b1e3f726bb16b8dcba6b95908","versionType":"git"},{"version":"4752eeb3d891c27905a8fdf4d80e899c0efd4ec7","status":"affected","lessThan":"7104a370714346b667712913dc16abf14bbc97ed","versionType":"git"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/veth.c"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"5.15","status":"affected"},{"version":"0","status":"unaffected","lessThan":"5.15","versionType":"semver"},{"version":"5.15.222","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.189","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.158","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.112","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.55","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.9","status":"unaffected","lessThanOrEqual":"7.2.*","versionType":"semver"},{"version":"7.3","status":"unaffected","lessThanOrEqual":"*","versionType":"original_commit_for_fix"}],"repo":"https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git","programFiles":["drivers/net/veth.c"]}],"references":[{"url":"https://git.kernel.org/stable/c/7a8e143109ff2736dc79e41dcd55af7ceab7520a"},{"url":"https://git.kernel.org/stable/c/1a5c5b9c64ba5f39dba55da6e12561ca56eeb758"},{"url":"https://git.kernel.org/stable/c/f0e8dba8c224981e53c792c6b3dbb7604fb2c2c6"},{"url":"https://git.kernel.org/stable/c/3c10a5dd0d38f506f671dbb59e9d0ee4c72076f9"},{"url":"https://git.kernel.org/stable/c/25bb7c36225220d30f404d7e29d2e052bc5f4b99"},{"url":"https://git.kernel.org/stable/c/43f6b647f209591b1e3f726bb16b8dcba6b95908"},{"url":"https://git.kernel.org/stable/c/7104a370714346b667712913dc16abf14bbc97ed"}],"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 - ETHTOOL_MSG_CHANNELS_SET enters ethnl_set_channels() -> veth_set_channels() -> veth_disable_range_safe()/veth_enable_range_safe() -> the patched veth_napi_del_range()/__veth_napi_enable_range(); this is local netlink configuration, and final traffic comes from the veth peer, not a remote protocol message.\nAC:L - The same attacker can resize down, replace XDP so veth_xdp_set() calls bpf_prog_put(), resize up, and transmit on the restored queue. RTNL serialization makes this a deterministic sequence rather than a race or victim-dependent condition.\nPR:L - ETHTOOL_MSG_CHANNELS_SET is GENL_UNS_ADMIN_PERM and RTM_SETLINK checks CAP_NET_ADMIN in the target network namespace; BPF_PROG_LOAD uses bpf_token_capable() to accept CAP_BPF/CAP_NET_ADMIN in a delegated token's user namespace, so init-namespace root is not required.\nUI:N - The attacker performs the XDP replacement, both channel resizes, and the peer transmission; no victim must mount, open, or otherwise act on attacker-supplied data.\nS:U - The stale rq->xdp_prog is consumed by veth_xdp_rcv_skb() inside the same host kernel that owns the veth device; it does not cross a VM, IOMMU, or separate security authority.\nC:H - The removed rq retains a freed vmalloc-backed struct bpf_prog; reclaiming it controls fields read by __bpf_prog_run(), including insnsi and bpf_func, enabling kernel code execution and arbitrary kernel reads.\nI:H - veth_xdp_rcv_skb() passes the stale program to bpf_prog_run_xdp(), and __bpf_prog_run() performs an indirect call through freed prog->bpf_func; controlled reuse can redirect kernel control flow.\nA:H - The reported restored-queue packet reaches veth_xdp_rcv_skb() through veth_poll() and faults on the freed program, producing an oops and fatal kernel panic."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-24T14:08:38.193Z"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"5.15.222"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.1.189"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.6.158"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.12.112"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"6.18.55"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.2.9"},{"vulnerable":true,"criteria":"cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*","versionStartIncluding":"5.15","versionEndExcluding":"7.3"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}}}}}