{"id":"CVE-2026-89511","title":"qede: Fix NULL pointer dereference in TPA fragment processing","summary":"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 continuat…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-476"],"vendor":"Linux","product":"Linux","affected":["Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < e2214e2793154b745436e46c6a9a7985d9b3781d","Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < dd8bc0a9d87d2b048711edd17ba7286432edd285","Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < fa7c9bd2c4a8de167e2fb32968ca4d91dd774375","Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < a5e1fdc126ab337d601d1a00cc4b47910679d005","Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < 7f911e208b3ca2c76d9f2bbba1f54b9403568c10","Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < 2a952fb1b20d83e83ca852773e6188511f7d2191","Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < f5c8619ccbd70102642120c4c6fda1c048a555fd","Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < 06aa3d26327f24edd039ff249672fdf6f2ba5695","Linux 4.18"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-16T19:22:54.697925Z"},"published":"2026-09-11","updated":"2026-10-19","sourceUpdated":"2026-10-19T08:48:02.658Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-89511","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"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89511.json"},{"url":"https://access.redhat.com/security/cve/CVE-2026-89511"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2532100"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-89511"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-89511"},{"url":"https://git.kernel.org/pub/scm/linux/security/vulns.git/plain/cve/published/2026/CVE-2026-89511.mbox"}],"tags":["cve.org","csaf","vex","red-hat","score-dispute"],"epss":0.00707,"epssPercentile":0.53234,"scores":{"cna":7.5,"vendor":5.5},"ingestedAt":"2026-09-14T15:23:07.452Z","slug":"CVE-2026-89511","body":"## Overview\n\nIn 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.\n\n## Affected\n\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < e2214e2793154b745436e46c6a9a7985d9b3781d`\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < dd8bc0a9d87d2b048711edd17ba7286432edd285`\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < fa7c9bd2c4a8de167e2fb32968ca4d91dd774375`\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < a5e1fdc126ab337d601d1a00cc4b47910679d005`\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < 7f911e208b3ca2c76d9f2bbba1f54b9403568c10`\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < 2a952fb1b20d83e83ca852773e6188511f7d2191`\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < f5c8619ccbd70102642120c4c6fda1c048a555fd`\n- `Linux >= 8a8633978b842c88fbcfe00d4e5dde96048f630e < 06aa3d26327f24edd039ff249672fdf6f2ba5695`\n- `Linux 4.18`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Vendor advisories\n\n- **Red Hat VEX** · Moderate · affected: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, Red Hat OpenShift Container Platform 4 · no fix planned: Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 7, Red Hat Enterprise Linux 8, Red Hat Enterprise Linux 9, … · updated 2026-09-18 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-89511.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":223305,"id":"CVE-2026-89511","ts":1792180051216,"field":"cvss","old":"5.5","new":"7.5"},{"seq":223304,"id":"CVE-2026-89511","ts":1792180051216,"field":"severity","old":"medium","new":"high"},{"seq":206938,"id":"CVE-2026-89511","ts":1789749708703,"field":"cvss","old":"7.5","new":"5.5"},{"seq":206937,"id":"CVE-2026-89511","ts":1789749708703,"field":"severity","old":"high","new":"medium"},{"seq":197992,"id":"CVE-2026-89511","ts":1789384321286,"field":"cvss","old":"5.9","new":"7.5"},{"seq":197991,"id":"CVE-2026-89511","ts":1789384321286,"field":"severity","old":"medium","new":"high"},{"seq":183803,"id":"CVE-2026-89511","ts":1789356677459,"field":"cvss","old":"7.5","new":"5.9"},{"seq":183802,"id":"CVE-2026-89511","ts":1789356677459,"field":"severity","old":"high","new":"medium"},{"seq":153304,"id":"CVE-2026-89511","ts":1789285349963,"field":"cvss","old":null,"new":"7.5"},{"seq":153303,"id":"CVE-2026-89511","ts":1789285349963,"field":"severity","old":"none","new":"high"},{"seq":147776,"id":"CVE-2026-89511","ts":1789270212245,"field":"cvss","old":null,"new":"5.9"},{"seq":147775,"id":"CVE-2026-89511","ts":1789270212245,"field":"severity","old":"none","new":"medium"},{"seq":109528,"id":"CVE-2026-89511","ts":1789183732293,"field":"cvss","old":null,"new":"5.9"},{"seq":109527,"id":"CVE-2026-89511","ts":1789183732293,"field":"severity","old":"none","new":"medium"}]}