CVE-2026-90264 (GCVE-0-2026-90264)

Vulnerability from cvelistv5 – Published: 2026-09-17 16:08 – Updated: 2026-09-17 16:08
VLAI
Title
btrfs: always wait for ordered extents to avoid OE races
Summary
In the Linux kernel, the following vulnerability has been resolved: btrfs: always wait for ordered extents to avoid OE races [BUG] Syzbot reported a bug that there can be conflicting OEs for the same range: BTRFS critical (device loop4): panic in insert_ordered_extent:264: overlapping ordered extents, existing oe file_offset 16384 num_bytes 430080 flags 0x1089, new oe file_offset 16384 num_bytes 430080 flags 0x80 (errno=-17 Object alrea[ 179.162726][ T6897] BTRFS critical (device loop4): panic in insert_ordered_extent:264: overlapping ordered extents, existing oe file_offset 16384 num_bytes 430080 flags 0x1089, new oe file_offset 16384 num_bytes 430080 flags 0x80 (errno=-17 Object already exists) ------------[ cut here ]------------ kernel BUG at fs/btrfs/ordered-data.c:264! Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026 RIP: 0010:btrfs_alloc_ordered_extent+0x943/0xad0 Call Trace: <TASK> cow_file_range+0x744/0x12a0 fallback_to_cow+0x5ea/0xa00 run_delalloc_nocow+0x110c/0x17a0 btrfs_run_delalloc_range+0xbe4/0x1c20 writepage_delalloc+0x104d/0x1ba0 btrfs_writepages+0x1667/0x28b0 do_writepages+0x338/0x560 filemap_fdatawrite_range+0x1f2/0x300 btrfs_fdatawrite_range+0x54/0xf0 btrfs_direct_write+0x6a0/0xc30 btrfs_do_write_iter+0x329/0x790 do_iter_readv_writev+0x624/0x8d0 vfs_writev+0x34c/0x990 __se_sys_pwritev2+0x17a/0x2a0 do_syscall_64+0x174/0x580 entry_SYSCALL_64_after_hwframe+0x77/0x7f </TASK> ---[ end trace 0000000000000000 ]--- [CAUSE] Since commit ff66fe666233 ("btrfs: fix incorrect buffered IO fallback for append direct writes"), if the direct IO finished short, we will revert the isize back to the original one, so that append writes can be respected during the buffered fallback. Normally we rely on lock_and_cleanup_extent_if_need() function during buffered writeback to wait for any existing ordered extents. But that ordered extent waiting only happens if the start_pos is inside the isize. Since we have reverted the isize during failed direct IO, we will not wait for any ordered extents. This means we can have a race where the direct IO OE is still in the tree, finished but not yet removed, then we're inserting the OE for the buffered write, causing the above crash. [FIX] Make the OE wait to be unconditional, to handle the reverted isize situation. And since lock_and_cleanup_extent_if_need() now either lock the extents or return -EAGAIN, also remove the branches that handles no-extent-locked cases, and rename it to remove the "_if_need" suffix. The following micro benchmark shows the runtime difference for btrfs_buffered_write(), doing `xfs_io -f -c "pwrite 0 1m"` workload, all values are the average runtime in nano seconds. function runtime | before | after -----------------------------------+-------------+--------------- lock_and_cleanup_extent_if_need() | 58.2 | 183.0 btrfs_buffered_write() | 2115.6 | 2973.3 The overall runtime of btrfs_buffered_write() is still pretty tiny (still less than 3 micro seconds), I'd say the extra cost is still acceptable. An alternative to fix this problem is to wait ordered extents during iomap_end() where the isize revert is done. But that solution will break nowait requirement, as if a nowait direct IO finished short, we have to wait for the OEs unconditionally or the next append buffered IO can still hit the same problem. So here we have to move the wait cost to buffered write, but at least the code is slightly more streamline.
Severity
No CVSS data available.
Assigner
References
Impacted products
Vendor Product Version CPE status
Linux Linux Affected: c3a3d3986719026c85950bfa6f41a251fc46e16f , < 58ce50b1802a446d3b26df1b9c58be1ab8913d0e (git)
Affected: ff66fe6662330226b3f486014c375538d91c44aa , < aaac9b352f7f53f5d2f7e58e612d67d2a2bf7094 (git)
Affected: ff66fe6662330226b3f486014c375538d91c44aa , < ec78575dde998c21be7e0cb2503b5620f34b6255 (git)
Affected: 4b5875cbb85dbf4d11385eb0a7a589c086d76d42 (git)
Affected: 10b1abc1d0c8ae25c2b9ac465515717c68ffff05 (git)
Affected: 097b159d43407b4ea0e5d14ae58a3bbfa5865a24 (git)
Affected: ccd5c23122b01de646c80485e2fadac82d1aab62 (git)
Affected: b8df7f486a4617d3096b8fa27148cfa54b1d6a8d (git)
Affected: 6.18.40 , < 6.18.52 (semver)
Affected: 5.15.212 , < 5.16 (semver)
Affected: 6.1.178 , < 6.2 (semver)
Affected: 6.6.145 , < 6.7 (semver)
Affected: 6.12.97 , < 6.13 (semver)
Affected: 7.1.4 , < 7.2 (semver)
guessed Create a notification for this product.
Linux Linux Affected: 7.2
Unaffected: 0 , < 7.2 (semver)
Unaffected: 6.18.52 , ≤ 6.18.* (semver)
Unaffected: 7.2.6 , ≤ 7.2.* (semver)
Unaffected: 7.3-rc1 , ≤ * (original_commit_for_fix)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "58ce50b1802a446d3b26df1b9c58be1ab8913d0e",
              "status": "affected",
              "version": "c3a3d3986719026c85950bfa6f41a251fc46e16f",
              "versionType": "git"
            },
            {
              "lessThan": "aaac9b352f7f53f5d2f7e58e612d67d2a2bf7094",
              "status": "affected",
              "version": "ff66fe6662330226b3f486014c375538d91c44aa",
              "versionType": "git"
            },
            {
              "lessThan": "ec78575dde998c21be7e0cb2503b5620f34b6255",
              "status": "affected",
              "version": "ff66fe6662330226b3f486014c375538d91c44aa",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "4b5875cbb85dbf4d11385eb0a7a589c086d76d42",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "10b1abc1d0c8ae25c2b9ac465515717c68ffff05",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "097b159d43407b4ea0e5d14ae58a3bbfa5865a24",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "ccd5c23122b01de646c80485e2fadac82d1aab62",
              "versionType": "git"
            },
            {
              "status": "affected",
              "version": "b8df7f486a4617d3096b8fa27148cfa54b1d6a8d",
              "versionType": "git"
            },
            {
              "lessThan": "6.18.52",
              "status": "affected",
              "version": "6.18.40",
              "versionType": "semver"
            },
            {
              "lessThan": "5.16",
              "status": "affected",
              "version": "5.15.212",
              "versionType": "semver"
            },
            {
              "lessThan": "6.2",
              "status": "affected",
              "version": "6.1.178",
              "versionType": "semver"
            },
            {
              "lessThan": "6.7",
              "status": "affected",
              "version": "6.6.145",
              "versionType": "semver"
            },
            {
              "lessThan": "6.13",
              "status": "affected",
              "version": "6.12.97",
              "versionType": "semver"
            },
            {
              "lessThan": "7.2",
              "status": "affected",
              "version": "7.1.4",
              "versionType": "semver"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "fs/btrfs/file.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "7.2"
            },
            {
              "lessThan": "7.2",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.52",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.6",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3-rc1",
              "versionType": "original_commit_for_fix"
            }
          ]
        }
      ],
      "cpeApplicability": [
        {
          "nodes": [
            {
              "cpeMatch": [
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "6.18.52",
                  "versionStartIncluding": "6.18.40",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.2.6",
                  "versionStartIncluding": "7.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionEndExcluding": "7.3-rc1",
                  "versionStartIncluding": "7.2",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "5.15.212",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.1.178",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.6.145",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "6.12.97",
                  "vulnerable": true
                },
                {
                  "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*",
                  "versionStartIncluding": "7.1.4",
                  "vulnerable": true
                }
              ],
              "negate": false,
              "operator": "OR"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: always wait for ordered extents to avoid OE races\n\n[BUG]\nSyzbot reported a bug that there can be conflicting OEs for the same\nrange:\n\n  BTRFS critical (device loop4): panic in insert_ordered_extent:264: overlapping ordered extents, existing oe file_offset 16384 num_bytes 430080 flags 0x1089, new oe file_offset 16384 num_bytes 430080 flags 0x80 (errno=-17 Object alrea[  179.162726][ T6897] BTRFS critical (device loop4): panic in insert_ordered_extent:264: overlapping ordered extents, existing oe file_offset 16384 num_bytes 430080 flags 0x1089, new oe file_offset 16384 num_bytes 430080 flags 0x80 (errno=-17 Object already exists)\n  ------------[ cut here ]------------\n  kernel BUG at fs/btrfs/ordered-data.c:264!\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026\n  RIP: 0010:btrfs_alloc_ordered_extent+0x943/0xad0\n  Call Trace:\n   \u003cTASK\u003e\n   cow_file_range+0x744/0x12a0\n   fallback_to_cow+0x5ea/0xa00\n   run_delalloc_nocow+0x110c/0x17a0\n   btrfs_run_delalloc_range+0xbe4/0x1c20\n   writepage_delalloc+0x104d/0x1ba0\n   btrfs_writepages+0x1667/0x28b0\n   do_writepages+0x338/0x560\n   filemap_fdatawrite_range+0x1f2/0x300\n   btrfs_fdatawrite_range+0x54/0xf0\n   btrfs_direct_write+0x6a0/0xc30\n   btrfs_do_write_iter+0x329/0x790\n   do_iter_readv_writev+0x624/0x8d0\n   vfs_writev+0x34c/0x990\n   __se_sys_pwritev2+0x17a/0x2a0\n   do_syscall_64+0x174/0x580\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n   \u003c/TASK\u003e\n  ---[ end trace 0000000000000000 ]---\n\n[CAUSE]\nSince commit ff66fe666233 (\"btrfs: fix incorrect buffered IO fallback\nfor append direct writes\"), if the direct IO finished short, we will\nrevert the isize back to the original one, so that append writes can be\nrespected during the buffered fallback.\n\nNormally we rely on lock_and_cleanup_extent_if_need() function during\nbuffered writeback to wait for any existing ordered extents.\n\nBut that ordered extent waiting only happens if the start_pos is inside\nthe isize.\nSince we have reverted the isize during failed direct IO, we will not\nwait for any ordered extents.\n\nThis means we can have a race where the direct IO OE is still in the\ntree, finished but not yet removed, then we\u0027re inserting the OE for the\nbuffered write, causing the above crash.\n\n[FIX]\nMake the OE wait to be unconditional, to handle the reverted isize\nsituation.\n\nAnd since lock_and_cleanup_extent_if_need() now either lock the\nextents or return -EAGAIN, also remove the branches that handles\nno-extent-locked cases, and rename it to remove the \"_if_need\" suffix.\n\nThe following micro benchmark shows the runtime difference for\nbtrfs_buffered_write(), doing `xfs_io -f -c \"pwrite 0 1m\"` workload,\nall values are the average runtime in nano seconds.\n\n      function runtime              |   before    |     after\n -----------------------------------+-------------+---------------\n lock_and_cleanup_extent_if_need()  |     58.2    |    183.0\n btrfs_buffered_write()             |   2115.6    |   2973.3\n\nThe overall runtime of btrfs_buffered_write() is still pretty\ntiny (still less than 3 micro seconds), I\u0027d say the extra cost is still\nacceptable.\n\nAn alternative to fix this problem is to wait ordered extents during\niomap_end() where the isize revert is done.\n\nBut that solution will break nowait requirement, as if a nowait direct\nIO finished short, we have to wait for the OEs unconditionally or the\nnext append buffered IO can still hit the same problem.\n\nSo here we have to move the wait cost to buffered write, but at least\nthe code is slightly more streamline."
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-17T16:08:00.740Z",
        "orgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "shortName": "Linux"
      },
      "references": [
        {
          "url": "https://git.kernel.org/stable/c/58ce50b1802a446d3b26df1b9c58be1ab8913d0e"
        },
        {
          "url": "https://git.kernel.org/stable/c/aaac9b352f7f53f5d2f7e58e612d67d2a2bf7094"
        },
        {
          "url": "https://git.kernel.org/stable/c/ec78575dde998c21be7e0cb2503b5620f34b6255"
        }
      ],
      "title": "btrfs: always wait for ordered extents to avoid OE races",
      "x_generator": {
        "engine": "bippy-1.2.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
    "assignerShortName": "Linux",
    "cveId": "CVE-2026-90264",
    "datePublished": "2026-09-17T16:08:00.740Z",
    "dateReserved": "2026-09-11T19:38:34.796Z",
    "dateUpdated": "2026-09-17T16:08:00.740Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-90264",
      "date": "2026-09-25",
      "epss": "0.00206",
      "percentile": "0.09515"
    },
    "microsoft_vex": {
      "current_release_date": "2026-09-23T01:58:21.000Z",
      "cve": "CVE-2026-90264",
      "id": "msrc_CVE-2026-90264",
      "initial_release_date": "2026-09-19T01:13:25.000Z",
      "product_status:known_affected": "2",
      "source": "Microsoft CSAF VEX",
      "status": "final",
      "title": "btrfs: always wait for ordered extents to avoid OE races",
      "url": "https://msrc.microsoft.com/csaf/vex/2026/msrc_cve-2026-90264.json",
      "version": "2"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "defaultStatus": "unaffected",
                "product": "Linux",
                "programFiles": [
                  "fs/btrfs/file.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "lessThan": "58ce50b1802a446d3b26df1b9c58be1ab8913d0e",
                    "status": "affected",
                    "version": "c3a3d3986719026c85950bfa6f41a251fc46e16f",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "aaac9b352f7f53f5d2f7e58e612d67d2a2bf7094",
                    "status": "affected",
                    "version": "ff66fe6662330226b3f486014c375538d91c44aa",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "ec78575dde998c21be7e0cb2503b5620f34b6255",
                    "status": "affected",
                    "version": "ff66fe6662330226b3f486014c375538d91c44aa",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "4b5875cbb85dbf4d11385eb0a7a589c086d76d42",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "10b1abc1d0c8ae25c2b9ac465515717c68ffff05",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "097b159d43407b4ea0e5d14ae58a3bbfa5865a24",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "ccd5c23122b01de646c80485e2fadac82d1aab62",
                    "versionType": "git"
                  },
                  {
                    "status": "affected",
                    "version": "b8df7f486a4617d3096b8fa27148cfa54b1d6a8d",
                    "versionType": "git"
                  },
                  {
                    "lessThan": "6.18.52",
                    "status": "affected",
                    "version": "6.18.40",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "5.16",
                    "status": "affected",
                    "version": "5.15.212",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.2",
                    "status": "affected",
                    "version": "6.1.178",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.7",
                    "status": "affected",
                    "version": "6.6.145",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "6.13",
                    "status": "affected",
                    "version": "6.12.97",
                    "versionType": "semver"
                  },
                  {
                    "lessThan": "7.2",
                    "status": "affected",
                    "version": "7.1.4",
                    "versionType": "semver"
                  }
                ]
              },
              {
                "defaultStatus": "affected",
                "product": "Linux",
                "programFiles": [
                  "fs/btrfs/file.c"
                ],
                "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
                "vendor": "Linux",
                "versions": [
                  {
                    "status": "affected",
                    "version": "7.2"
                  },
                  {
                    "lessThan": "7.2",
                    "status": "unaffected",
                    "version": "0",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "6.18.*",
                    "status": "unaffected",
                    "version": "6.18.52",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "7.2.*",
                    "status": "unaffected",
                    "version": "7.2.6",
                    "versionType": "semver"
                  },
                  {
                    "lessThanOrEqual": "*",
                    "status": "unaffected",
                    "version": "7.3-rc1",
                    "versionType": "original_commit_for_fix"
                  }
                ]
              }
            ],
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbtrfs: always wait for ordered extents to avoid OE races\n\n[BUG]\nSyzbot reported a bug that there can be conflicting OEs for the same\nrange:\n\n  BTRFS critical (device loop4): panic in insert_ordered_extent:264: overlapping ordered extents, existing oe file_offset 16384 num_bytes 430080 flags 0x1089, new oe file_offset 16384 num_bytes 430080 flags 0x80 (errno=-17 Object alrea[  179.162726][ T6897] BTRFS critical (device loop4): panic in insert_ordered_extent:264: overlapping ordered extents, existing oe file_offset 16384 num_bytes 430080 flags 0x1089, new oe file_offset 16384 num_bytes 430080 flags 0x80 (errno=-17 Object already exists)\n  ------------[ cut here ]------------\n  kernel BUG at fs/btrfs/ordered-data.c:264!\n  Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/09/2026\n  RIP: 0010:btrfs_alloc_ordered_extent+0x943/0xad0\n  Call Trace:\n   \u003cTASK\u003e\n   cow_file_range+0x744/0x12a0\n   fallback_to_cow+0x5ea/0xa00\n   run_delalloc_nocow+0x110c/0x17a0\n   btrfs_run_delalloc_range+0xbe4/0x1c20\n   writepage_delalloc+0x104d/0x1ba0\n   btrfs_writepages+0x1667/0x28b0\n   do_writepages+0x338/0x560\n   filemap_fdatawrite_range+0x1f2/0x300\n   btrfs_fdatawrite_range+0x54/0xf0\n   btrfs_direct_write+0x6a0/0xc30\n   btrfs_do_write_iter+0x329/0x790\n   do_iter_readv_writev+0x624/0x8d0\n   vfs_writev+0x34c/0x990\n   __se_sys_pwritev2+0x17a/0x2a0\n   do_syscall_64+0x174/0x580\n   entry_SYSCALL_64_after_hwframe+0x77/0x7f\n   \u003c/TASK\u003e\n  ---[ end trace 0000000000000000 ]---\n\n[CAUSE]\nSince commit ff66fe666233 (\"btrfs: fix incorrect buffered IO fallback\nfor append direct writes\"), if the direct IO finished short, we will\nrevert the isize back to the original one, so that append writes can be\nrespected during the buffered fallback.\n\nNormally we rely on lock_and_cleanup_extent_if_need() function during\nbuffered writeback to wait for any existing ordered extents.\n\nBut that ordered extent waiting only happens if the start_pos is inside\nthe isize.\nSince we have reverted the isize during failed direct IO, we will not\nwait for any ordered extents.\n\nThis means we can have a race where the direct IO OE is still in the\ntree, finished but not yet removed, then we\u0027re inserting the OE for the\nbuffered write, causing the above crash.\n\n[FIX]\nMake the OE wait to be unconditional, to handle the reverted isize\nsituation.\n\nAnd since lock_and_cleanup_extent_if_need() now either lock the\nextents or return -EAGAIN, also remove the branches that handles\nno-extent-locked cases, and rename it to remove the \"_if_need\" suffix.\n\nThe following micro benchmark shows the runtime difference for\nbtrfs_buffered_write(), doing `xfs_io -f -c \"pwrite 0 1m\"` workload,\nall values are the average runtime in nano seconds.\n\n      function runtime              |   before    |     after\n -----------------------------------+-------------+---------------\n lock_and_cleanup_extent_if_need()  |     58.2    |    183.0\n btrfs_buffered_write()             |   2115.6    |   2973.3\n\nThe overall runtime of btrfs_buffered_write() is still pretty\ntiny (still less than 3 micro seconds), I\u0027d say the extra cost is still\nacceptable.\n\nAn alternative to fix this problem is to wait ordered extents during\niomap_end() where the isize revert is done.\n\nBut that solution will break nowait requirement, as if a nowait direct\nIO finished short, we have to wait for the OEs unconditionally or the\nnext append buffered IO can still hit the same problem.\n\nSo here we have to move the wait cost to buffered write, but at least\nthe code is slightly more streamline."
          }
        ],
        "id": "CVE-2026-90264",
        "lastModified": "2026-09-17T17:17:22.853",
        "metrics": {},
        "published": "2026-09-17T17:17:22.853",
        "references": [
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/58ce50b1802a446d3b26df1b9c58be1ab8913d0e"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/aaac9b352f7f53f5d2f7e58e612d67d2a2bf7094"
          },
          {
            "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
            "url": "https://git.kernel.org/stable/c/ec78575dde998c21be7e0cb2503b5620f34b6255"
          }
        ],
        "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
        "vulnStatus": "Received"
      }
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2026-09-21T23:44:43Z",
      "cve": "CVE-2026-90264",
      "id": "CVE-2026-90264",
      "initial_release_date": "2026-09-21T23:44:43Z",
      "product_status:known_not_affected": "347",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2026-90264",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2026-90264.json",
      "version": "2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.