{"id":"CVE-2026-89511","state":"PUBLISHED","title":"qede: Fix NULL pointer dereference in TPA fragment processing","description":"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.","publishedAt":"2026-09-11T19:43:56.640Z","updatedAt":"2026-10-19T08:48:02.658Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"Linux"},"assigner":"Linux","products":["Linux Linux"],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"e2214e2793154b745436e46c6a9a7985d9b3781d","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"dd8bc0a9d87d2b048711edd17ba7286432edd285","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"fa7c9bd2c4a8de167e2fb32968ca4d91dd774375","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"a5e1fdc126ab337d601d1a00cc4b47910679d005","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"7f911e208b3ca2c76d9f2bbba1f54b9403568c10","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"2a952fb1b20d83e83ca852773e6188511f7d2191","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"f5c8619ccbd70102642120c4c6fda1c048a555fd","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"06aa3d26327f24edd039ff249672fdf6f2ba5695","versionType":"git"}],"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"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","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/ethernet/qlogic/qede/qede.h","drivers/net/ethernet/qlogic/qede/qede_fp.c"]}],"references":["https://git.kernel.org/stable/c/e2214e2793154b745436e46c6a9a7985d9b3781d","https://git.kernel.org/stable/c/dd8bc0a9d87d2b048711edd17ba7286432edd285","https://git.kernel.org/stable/c/fa7c9bd2c4a8de167e2fb32968ca4d91dd774375","https://git.kernel.org/stable/c/a5e1fdc126ab337d601d1a00cc4b47910679d005","https://git.kernel.org/stable/c/7f911e208b3ca2c76d9f2bbba1f54b9403568c10","https://git.kernel.org/stable/c/2a952fb1b20d83e83ca852773e6188511f7d2191","https://git.kernel.org/stable/c/f5c8619ccbd70102642120c4c6fda1c048a555fd","https://git.kernel.org/stable/c/06aa3d26327f24edd039ff249672fdf6f2ba5695"],"weaknesses":[],"ingestedAt":"2026-10-29T20:13:26.108Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/89xxx/CVE-2026-89511.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-89511","state":"PUBLISHED","datePublished":"2026-09-11T19:43:56.640Z","dateUpdated":"2026-10-19T08:48:02.658Z","assignerShortName":"Linux","assignerOrgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateReserved":"2026-09-11T19:38:34.716Z"},"containers":{"cna":{"title":"qede: Fix NULL pointer dereference in TPA fragment processing","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."}],"affected":[{"vendor":"Linux","product":"Linux","defaultStatus":"unaffected","versions":[{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"e2214e2793154b745436e46c6a9a7985d9b3781d","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"dd8bc0a9d87d2b048711edd17ba7286432edd285","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"fa7c9bd2c4a8de167e2fb32968ca4d91dd774375","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"a5e1fdc126ab337d601d1a00cc4b47910679d005","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"7f911e208b3ca2c76d9f2bbba1f54b9403568c10","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"2a952fb1b20d83e83ca852773e6188511f7d2191","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"f5c8619ccbd70102642120c4c6fda1c048a555fd","versionType":"git"},{"version":"8a8633978b842c88fbcfe00d4e5dde96048f630e","status":"affected","lessThan":"06aa3d26327f24edd039ff249672fdf6f2ba5695","versionType":"git"}],"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"]},{"vendor":"Linux","product":"Linux","defaultStatus":"affected","versions":[{"version":"4.18","status":"affected"},{"version":"0","status":"unaffected","lessThan":"4.18","versionType":"semver"},{"version":"5.10.270","status":"unaffected","lessThanOrEqual":"5.10.*","versionType":"semver"},{"version":"5.15.221","status":"unaffected","lessThanOrEqual":"5.15.*","versionType":"semver"},{"version":"6.1.188","status":"unaffected","lessThanOrEqual":"6.1.*","versionType":"semver"},{"version":"6.6.157","status":"unaffected","lessThanOrEqual":"6.6.*","versionType":"semver"},{"version":"6.12.109","status":"unaffected","lessThanOrEqual":"6.12.*","versionType":"semver"},{"version":"6.18.50","status":"unaffected","lessThanOrEqual":"6.18.*","versionType":"semver"},{"version":"7.2.4","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/ethernet/qlogic/qede/qede.h","drivers/net/ethernet/qlogic/qede/qede_fp.c"]}],"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"}],"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."}]}],"providerMetadata":{"shortName":"Linux","orgId":"416baaa9-dc9f-4396-8d5f-8c081fb06d67","dateUpdated":"2026-10-19T08:48:02.658Z"},"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"}]}]}],"x_generator":{"engine":"bippy-1.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","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"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-10-16T19:26:40.664Z"}}]}}}