{ "dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": { "cveId": "CVE-2026-89511", "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "state": "PUBLISHED", "assignerShortName": "Linux", "dateReserved": "2026-09-11T19:38:34.716Z", "datePublished": "2026-09-11T19:43:56.640Z", "dateUpdated": "2026-10-19T08:48:02.658Z" }, "containers": { "cna": { "providerMetadata": { "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "shortName": "Linux", "dateUpdated": "2026-10-19T08:48:02.658Z" }, "descriptions": [ { "lang": "en", "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nqede: Fix NULL pointer dereference in TPA fragment processing\n\nUnder memory pressure, the qede driver encounters NULL pointer\ndereferences when processing TPA continuation fragments.\n\nCommit 8a8633978b84 (\"qede: Add build_skb() support.\") accidentally\ndropped the assignment of tpa_info->buffer.data in qede_tpa_start().\n\nWhen memory pressure causes an SKB allocation failure in qede_tpa_start(),\nthe driver sets tpa_start_fail = true and attempts to recycle the physical\npage later in qede_tpa_end() via qede_reuse_page(). However, because\nbuffer.data was left uninitialized (NULL), qede_reuse_page() pushes a\n\"ghost\" BD (valid DMA mapping but NULL data pointer) back into the\nactive Rx ring.\n\nThe next time the hardware uses this ring slot, it passes a NULL page\nto qede_fill_frag_skb(), causing a kernel panic.\n\nExample crash from production system:\n BUG: unable to handle kernel NULL pointer dereference at 0x8\n RIP: qede_fill_frag_skb+0x96/0x430 [qede]\n Call Trace:\n qede_rx_int+0xb06/0x1de0\n qede_poll+0x2f4/0x6c0\n __napi_poll+0x2d/0x130\n\nFix the root cause by restoring the tpa_info->buffer.data assignment\nin qede_tpa_start(), ensuring valid pages are correctly tracked and\nrecycled. Additionally, update the stale comment for\nstruct qede_agg_info::buffer to reflect its current usage." } ], "metrics": [ { "cvssV3_1": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "baseScore": 7.5, "baseSeverity": "HIGH" }, "scenarios": [ { "lang": "en", "value": "AV:N - The bug is in qede TPA/GRO RX on Marvell/QLogic FastLinQ NICs used on internet-facing datacenter and cloud servers. Remote TCP segments cause firmware to post TPA CQEs handled by qede_msix_fp_int()->qede_poll()->qede_rx_int()->qede_rx_process_tpa_cqe()->qede_tpa_start()/qede_tpa_end()/qede_fill_frag_skb().\nAC:L - An attacker can send high-rate TCP streams that HW GRO (enabled by default) aggregates and flood GFP_ATOMIC skb allocations until qede_tpa_start() fails, then keep sending so the recycled ghost BD is consumed. No uncontrolled race or victim-specific layout is required; the attacker drives TPA and the allocation-failure condition.\nPR:N - NIC receive and TPA completion handling run in softirq on inbound frames with no authentication, capability check, or local account. Any unauthenticated remote host that can send Ethernet/TCP traffic to a qede interface can reach the vulnerable path.\nUI:N - Packet reception, MSI-X interrupt handling, and NAPI polling process attacker frames automatically whenever the qede interface is up. The victim need not mount a filesystem, open a device, or otherwise interact.\nS:U - The NULL dereference oops stays in the host kernel that owns the qede driver and RX rings. It does not cross a VM, IOMMU, container, or other security-authority boundary.\nC:N - The fault is a pure NULL page-pointer dereference in qede_fill_frag_skb() (production RIP at offset 0x8) when a recycled ghost BD with buffer.data==NULL is consumed. There is no use-after-free reclaim, out-of-bounds read, or other disclosure primitive.\nI:N - skb_fill_page_desc()/page_ref_inc() abort immediately on the NULL page pointer without writing attacker-controlled data into other kernel objects, so there is no arbitrary-write or control-flow hijack primitive.\nA:H - The documented production crash is a kernel NULL pointer dereference panic in NAPI/softirq context (qede_fill_frag_skb), which is a complete availability impact under kernel CVSS guidance and can be retriggered by further traffic." } ] } ], "affected": [ { "product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/qlogic/qede/qede.h", "drivers/net/ethernet/qlogic/qede/qede_fp.c" ], "versions": [ { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "e2214e2793154b745436e46c6a9a7985d9b3781d", "status": "affected", "versionType": "git" }, { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "dd8bc0a9d87d2b048711edd17ba7286432edd285", "status": "affected", "versionType": "git" }, { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "fa7c9bd2c4a8de167e2fb32968ca4d91dd774375", "status": "affected", "versionType": "git" }, { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "a5e1fdc126ab337d601d1a00cc4b47910679d005", "status": "affected", "versionType": "git" }, { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "7f911e208b3ca2c76d9f2bbba1f54b9403568c10", "status": "affected", "versionType": "git" }, { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "2a952fb1b20d83e83ca852773e6188511f7d2191", "status": "affected", "versionType": "git" }, { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "f5c8619ccbd70102642120c4c6fda1c048a555fd", "status": "affected", "versionType": "git" }, { "version": "8a8633978b842c88fbcfe00d4e5dde96048f630e", "lessThan": "06aa3d26327f24edd039ff249672fdf6f2ba5695", "status": "affected", "versionType": "git" } ] }, { "product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": [ "drivers/net/ethernet/qlogic/qede/qede.h", "drivers/net/ethernet/qlogic/qede/qede_fp.c" ], "versions": [ { "version": "4.18", "status": "affected" }, { "version": "0", "lessThan": "4.18", "status": "unaffected", "versionType": "semver" }, { "version": "5.10.270", "lessThanOrEqual": "5.10.*", "status": "unaffected", "versionType": "semver" }, { "version": "5.15.221", "lessThanOrEqual": "5.15.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.1.188", "lessThanOrEqual": "6.1.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.6.157", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.12.109", "lessThanOrEqual": "6.12.*", "status": "unaffected", "versionType": "semver" }, { "version": "6.18.50", "lessThanOrEqual": "6.18.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.2.4", "lessThanOrEqual": "7.2.*", "status": "unaffected", "versionType": "semver" }, { "version": "7.3", "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": "4.18", "versionEndExcluding": "5.10.270" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "5.15.221" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.1.188" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.6.157" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.12.109" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "6.18.50" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.2.4" }, { "vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "4.18", "versionEndExcluding": "7.3" } ] } ] } ], "references": [ { "url": "https://git.kernel.org/stable/c/e2214e2793154b745436e46c6a9a7985d9b3781d" }, { "url": "https://git.kernel.org/stable/c/dd8bc0a9d87d2b048711edd17ba7286432edd285" }, { "url": "https://git.kernel.org/stable/c/fa7c9bd2c4a8de167e2fb32968ca4d91dd774375" }, { "url": "https://git.kernel.org/stable/c/a5e1fdc126ab337d601d1a00cc4b47910679d005" }, { "url": "https://git.kernel.org/stable/c/7f911e208b3ca2c76d9f2bbba1f54b9403568c10" }, { "url": "https://git.kernel.org/stable/c/2a952fb1b20d83e83ca852773e6188511f7d2191" }, { "url": "https://git.kernel.org/stable/c/f5c8619ccbd70102642120c4c6fda1c048a555fd" }, { "url": "https://git.kernel.org/stable/c/06aa3d26327f24edd039ff249672fdf6f2ba5695" } ], "title": "qede: Fix NULL pointer dereference in TPA fragment processing", "x_generator": { "engine": "bippy-1.2.0" } }, "adp": [ { "metrics": [ { "other": { "type": "ssvc", "content": { "id": "CVE-2026-89511", "role": "CISA Coordinator", "options": [ { "Exploitation": "none" }, { "Automatable": "yes" }, { "Technical Impact": "partial" } ], "version": "2.0.3", "timestamp": "2026-10-16T19:22:54.697925Z" } } } ], "title": "CISA ADP Vulnrichment", "providerMetadata": { "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-10-16T19:26:40.664Z" } } ] } }