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arm64: csum: Fix OoB access in IP checksum code for negative lengths

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: arm64: csum: Fix OoB access in IP checksum code for negative lengths Although commit c2c24edb1d9c ("arm64: csum: Fix pathological zero-length calls") added an early return for zero-length input, syzkaller has popped up with an example of a _negative_ length which causes an undefined shift and an out-of-bounds read: | BUG: KASAN: slab-out-of-bounds in do_csum+0x44/0x254 arch/arm64/lib/csum.c:39 | Read of size 4294966928 at addr ffff0000d7ac0170 by task syz-executor412/5975 | | CPU: 0 PID: 5975 Comm: syz-executor412 Not tainted 6.4.0-rc4-syzkaller-g908f31f2a05b #0 | Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 | Call trace: | dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 | show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 | __dump_stack lib/dump_stack.c:88 [inline] | dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 | print_address_description mm/kasan/report.c:351 [inline] | print_report+0x174/0x514 mm/kasan/report.c:462 | kasan_report+0xd4/0x130 mm/kasan/report.c:572 | kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:187 | __kasan_check_read+0x20/0x30 mm/kasan/shadow.c:31 | do_csum+0x44/0x254 arch/arm64/lib/csum.c:39 | csum_partial+0x30/0x58 lib/checksum.c:128 | gso_make_checksum include/linux/skbuff.h:4928 [inline] | __udp_gso_segment+0xaf4/0x1bc4 net/ipv4/udp_offload.c:332 | udp6_ufo_fragment+0x540/0xca0 net/ipv6/udp_offload.c:47 | ipv6_gso_seg

Announced Source revision 1
Original source ↗

CVE-2023-53726

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2023-53726

Linux

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Linux

Source reference: /containers/cna/affected/1/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5777eaed566a1d63e344d3dd8f2b5e33be20643e",
        "lessThan": "5a85727239a23de1cc8d93985f1056308128f3e2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5777eaed566a1d63e344d3dd8f2b5e33be20643e",
        "lessThan": "9a43563cfd6b9200ff2f76b3f9fcdcb217ceb523",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5777eaed566a1d63e344d3dd8f2b5e33be20643e",
        "lessThan": "ba0b46166b8e547024d02345a68b747841931ad2",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5777eaed566a1d63e344d3dd8f2b5e33be20643e",
        "lessThan": "a5ad2f87d8e74e351d3f500ad9d5b3a5653e1c6f",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5777eaed566a1d63e344d3dd8f2b5e33be20643e",
        "lessThan": "fcdf904e866de0e3715835e50409fda3b2590527",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "5777eaed566a1d63e344d3dd8f2b5e33be20643e",
        "lessThan": "8bd795fedb8450ecbef18eeadbd23ed8fc7630f5",
        "versionType": "git"
      }
    ],
    "programFiles": [
      "arch/arm64/lib/csum.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "5.6"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "5.6",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "5.10.195",
        "versionType": "semver",
        "lessThanOrEqual": "5.10.*"
      },
      {
        "status": "unaffected",
        "version": "5.15.132",
        "versionType": "semver",
        "lessThanOrEqual": "5.15.*"
      },
      {
        "status": "unaffected",
        "version": "6.1.53",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.4.16",
        "versionType": "semver",
        "lessThanOrEqual": "6.4.*"
      },
      {
        "status": "unaffected",
        "version": "6.5.3",
        "versionType": "semver",
        "lessThanOrEqual": "6.5.*"
      },
      {
        "status": "unaffected",
        "version": "6.6",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "arch/arm64/lib/csum.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2023-53726

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#30312 · Revision 1
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Publisher date
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