FKIE_CVE-2026-98572

Vulnerability from fkie_nvd - Published: 2026-10-18 16:17 - Updated: 2026-10-19 10:19
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: bpf: Fix immediate JMP JEQ/JNE on MIPS32 An addu instruction was emitted instead of addiu, causing the immediate value 1 to be interpreted as register $at. This made the comparison result invalid when the immediate operand was negative. Note that $at is mapped to BPF_REG_AX, which is used for constant blinding. Fix the instruction to use the immediate form. Found with test_bpf on MIPS32r1 emulated by QEMU.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1547e9f3a7d71971216e6dba30270cae13fe4e02
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/876ef04c75c2751acfd355606fca3eced71dec65
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/beeae92e70e705e90a0d6d9b3b8498ee3b92f495
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/db762fd96be225bd06161c9631160c755d891693
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "arch/mips/net/bpf_jit_comp32.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "1547e9f3a7d71971216e6dba30270cae13fe4e02",
              "status": "affected",
              "version": "eb63cfcd2ee8ec3805f6881f43341f589c3d2278",
              "versionType": "git"
            },
            {
              "lessThan": "beeae92e70e705e90a0d6d9b3b8498ee3b92f495",
              "status": "affected",
              "version": "eb63cfcd2ee8ec3805f6881f43341f589c3d2278",
              "versionType": "git"
            },
            {
              "lessThan": "6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0",
              "status": "affected",
              "version": "eb63cfcd2ee8ec3805f6881f43341f589c3d2278",
              "versionType": "git"
            },
            {
              "lessThan": "876ef04c75c2751acfd355606fca3eced71dec65",
              "status": "affected",
              "version": "eb63cfcd2ee8ec3805f6881f43341f589c3d2278",
              "versionType": "git"
            },
            {
              "lessThan": "1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8",
              "status": "affected",
              "version": "eb63cfcd2ee8ec3805f6881f43341f589c3d2278",
              "versionType": "git"
            },
            {
              "lessThan": "db762fd96be225bd06161c9631160c755d891693",
              "status": "affected",
              "version": "eb63cfcd2ee8ec3805f6881f43341f589c3d2278",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "arch/mips/net/bpf_jit_comp32.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "5.16"
            },
            {
              "lessThan": "5.16",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.189",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.158",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.112",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.55",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.9",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "*",
              "status": "unaffected",
              "version": "7.3",
              "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\nbpf: Fix immediate JMP JEQ/JNE on MIPS32\n\nAn addu instruction was emitted instead of addiu, causing the immediate\nvalue 1 to be interpreted as register $at. This made the comparison\nresult invalid when the immediate operand was negative. Note that $at\nis mapped to BPF_REG_AX, which is used for constant blinding.\n\nFix the instruction to use the immediate form.\n\nFound with test_bpf on MIPS32r1 emulated by QEMU."
    }
  ],
  "id": "CVE-2026-98572",
  "lastModified": "2026-10-19T10:19:15.310",
  "metrics": {},
  "published": "2026-10-18T16:17:09.477",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1547e9f3a7d71971216e6dba30270cae13fe4e02"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/1bd91670966a7142ac94f2cebe2b5ae6bf5cb0c8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/6f939529ed6c580e9b6c5daa20be67fa0b3d4cf0"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/876ef04c75c2751acfd355606fca3eced71dec65"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/beeae92e70e705e90a0d6d9b3b8498ee3b92f495"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/db762fd96be225bd06161c9631160c755d891693"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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