FKIE_CVE-2026-89879

Vulnerability from fkie_nvd - Published: 2026-09-16 11:16 - Updated: 2026-09-16 11:16
Severity
Summary
In the Linux kernel, the following vulnerability has been resolved: media: s2255: bound JPEG frame size before copying into the buffer s2255_fillbuff() memcpy()s vc->jpg_size bytes of a captured JPEG/MJPEG frame into the vb2 plane. vc->jpg_size is taken verbatim from the S2255_MARKER_FRAME header the device sends (pdword[4] in save_frame()) and, unlike the frame payload length just above it, is never bounded: payload = le32_to_cpu(pdword[3]); if (payload > vc->req_image_size) /* payload is checked ... */ return -EINVAL; vc->pkt_size = payload; vc->jpg_size = le32_to_cpu(pdword[4]); /* ... jpg_size is not */ A malicious or malfunctioning device can therefore report a jpg_size larger than the destination vb2 plane, and the memcpy() writes past it. jpg_size is a signed int, so a value with the top bit set also turns into a huge length. Reject a frame whose jpg_size is negative or exceeds the plane size before copying it.
References
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/2542516a147bfad740e7e411c251b639fad260ff
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/32a595dd3e8634544e5cfbc47f906dff3d3c1ef8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/4b6f7bccc6559ae5c54573c284fe76eafc9989b2
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/68d664f1b4efe525e99154b7058fcb0378bdaff7
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/d2ecaaab6a4f165abb54cdf61be60030b5782bf8
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/dd739517560c8d0ec4463a53e717bf40b988d7da
416baaa9-dc9f-4396-8d5f-8c081fb06d67https://git.kernel.org/stable/c/e504cc888f42999dd76b6a43788c422610f2aad2
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unaffected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/usb/s2255/s2255drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "lessThan": "32a595dd3e8634544e5cfbc47f906dff3d3c1ef8",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            },
            {
              "lessThan": "4b6f7bccc6559ae5c54573c284fe76eafc9989b2",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            },
            {
              "lessThan": "2542516a147bfad740e7e411c251b639fad260ff",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            },
            {
              "lessThan": "79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            },
            {
              "lessThan": "d2ecaaab6a4f165abb54cdf61be60030b5782bf8",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            },
            {
              "lessThan": "68d664f1b4efe525e99154b7058fcb0378bdaff7",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            },
            {
              "lessThan": "dd739517560c8d0ec4463a53e717bf40b988d7da",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            },
            {
              "lessThan": "e504cc888f42999dd76b6a43788c422610f2aad2",
              "status": "affected",
              "version": "38f993ad8b1fe4caf9e989caf6e2a25aff3bbaf7",
              "versionType": "git"
            }
          ]
        },
        {
          "defaultStatus": "affected",
          "product": "Linux",
          "programFiles": [
            "drivers/media/usb/s2255/s2255drv.c"
          ],
          "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
          "vendor": "Linux",
          "versions": [
            {
              "status": "affected",
              "version": "2.6.27"
            },
            {
              "lessThan": "2.6.27",
              "status": "unaffected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.10.*",
              "status": "unaffected",
              "version": "5.10.270",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "5.15.*",
              "status": "unaffected",
              "version": "5.15.221",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.1.*",
              "status": "unaffected",
              "version": "6.1.188",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.6.*",
              "status": "unaffected",
              "version": "6.6.157",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.12.*",
              "status": "unaffected",
              "version": "6.12.110",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "6.18.*",
              "status": "unaffected",
              "version": "6.18.51",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "7.2.*",
              "status": "unaffected",
              "version": "7.2.5",
              "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\nmedia: s2255: bound JPEG frame size before copying into the buffer\n\ns2255_fillbuff() memcpy()s vc-\u003ejpg_size bytes of a captured JPEG/MJPEG\nframe into the vb2 plane.  vc-\u003ejpg_size is taken verbatim from the\nS2255_MARKER_FRAME header the device sends (pdword[4] in save_frame())\nand, unlike the frame payload length just above it, is never bounded:\n\n\tpayload = le32_to_cpu(pdword[3]);\n\tif (payload \u003e vc-\u003ereq_image_size)\t/* payload is checked ... */\n\t\treturn -EINVAL;\n\tvc-\u003epkt_size = payload;\n\tvc-\u003ejpg_size = le32_to_cpu(pdword[4]);\t/* ... jpg_size is not */\n\nA malicious or malfunctioning device can therefore report a jpg_size\nlarger than the destination vb2 plane, and the memcpy() writes past it.\njpg_size is a signed int, so a value with the top bit set also turns\ninto a huge length.\n\nReject a frame whose jpg_size is negative or exceeds the plane size\nbefore copying it."
    }
  ],
  "id": "CVE-2026-89879",
  "lastModified": "2026-09-16T11:16:56.230",
  "metrics": {},
  "published": "2026-09-16T11:16:56.230",
  "references": [
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/2542516a147bfad740e7e411c251b639fad260ff"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/32a595dd3e8634544e5cfbc47f906dff3d3c1ef8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/4b6f7bccc6559ae5c54573c284fe76eafc9989b2"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/68d664f1b4efe525e99154b7058fcb0378bdaff7"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/79f58f900dd221ab04ea74bf4eaf79fa3b0fcc77"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/d2ecaaab6a4f165abb54cdf61be60030b5782bf8"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/dd739517560c8d0ec4463a53e717bf40b988d7da"
    },
    {
      "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
      "url": "https://git.kernel.org/stable/c/e504cc888f42999dd76b6a43788c422610f2aad2"
    }
  ],
  "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67",
  "vulnStatus": "Received"
}



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