CVE-2026-98048

Full vulnerability record from the local CVENow database.

Description

In the Linux kernel, the following vulnerability has been resolved: bpf: don't rewrite bpf_fastcall patterns entered by a jump mark_fastcall_pattern_for_call() must ensure that matched "spill; call; fill" instruction series is not interrupted by a jump. Otherwise the rewrite applied by bpf_remove_fastcall_spills_fills() is not sound. Record the instructions targeted by jumps in insn_aux_data[*].jump_target when the CFG is built and use this flag to stop growing a pattern at such an instruction. Jumps to the first spill are fine. Note that existing insn_aux_data[*].jmp_point field can't be reused, as it marks subprogram return instructions.

Severity

Not scored

CVSS score

Not available

Vulnerability status

Received

Source identifier

416baaa9-dc9f-4396-8d5f-8c081fb06d67

Published

2026-09-25 11:17:33.663000

Last modified

2026-10-21 13:21:20.280000

View original CVE JSON

{
  "id": "CVE-2026-98048",
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "published": "2026-09-25T11:17:33.663",
  "lastModified": "2026-10-21T13:21:20.280",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "In the Linux kernel, the following vulnerability has been resolved:\n\nbpf: don't rewrite bpf_fastcall patterns entered by a jump\n\nmark_fastcall_pattern_for_call() must ensure that matched\n\"spill; call; fill\" instruction series is not interrupted by a jump.\nOtherwise the rewrite applied by bpf_remove_fastcall_spills_fills()\nis not sound.\n\nRecord the instructions targeted by jumps in\ninsn_aux_data[*].jump_target when the CFG is built and use this flag\nto stop growing a pattern at such an instruction. Jumps to the first\nspill are fine.\n\nNote that existing insn_aux_data[*].jmp_point field can't be reused,\nas it marks subprogram return instructions."
    }
  ],
  "affected": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "affectedData": [
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "unaffected",
          "programFiles": [
            "include/linux/bpf_verifier.h",
            "kernel/bpf/cfg.c",
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
              "lessThan": "a0cd1c3ac63504ba3c50c01a00c11812919b619f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
              "lessThan": "c4d3bdb3ab211dcfad734b02e06fcb12adb4757f",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
              "lessThan": "24adbc2c3bbe3385ce922587e1f8e837a68b3e25",
              "versionType": "git",
              "status": "affected"
            },
            {
              "version": "5b5f51bff1b66cedb62b5ba74a1878341204e057",
              "lessThan": "0b1c83dc3c4401cd7e846548f62e3caf3d06742e",
              "versionType": "git",
              "status": "affected"
            }
          ]
        },
        {
          "vendor": "Linux",
          "product": "Linux",
          "defaultStatus": "affected",
          "programFiles": [
            "include/linux/bpf_verifier.h",
            "kernel/bpf/cfg.c",
            "kernel/bpf/verifier.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "versions": [
            {
              "version": "6.12",
              "status": "affected"
            },
            {
              "version": "0",
              "lessThan": "6.12",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.12.114",
              "lessThanOrEqual": "6.12.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "6.18.57",
              "lessThanOrEqual": "6.18.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.2.7",
              "lessThanOrEqual": "7.2.*",
              "versionType": "semver",
              "status": "unaffected"
            },
            {
              "version": "7.3",
              "lessThanOrEqual": "*",
              "versionType": "original_commit_for_fix",
              "status": "unaffected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {},
  "references": [
    {
      "url": "https://git.kernel.org/stable/c/0b1c83dc3c4401cd7e846548f62e3caf3d06742e",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/24adbc2c3bbe3385ce922587e1f8e837a68b3e25",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/a0cd1c3ac63504ba3c50c01a00c11812919b619f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    },
    {
      "url": "https://git.kernel.org/stable/c/c4d3bdb3ab211dcfad734b02e06fcb12adb4757f",
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67"
    }
  ]
}