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ipv6: Fix use-after-free in inet6_addr_del().

Type: advisorySource: Official CVE List1 source record

In the Linux kernel, the following vulnerability has been resolved: ipv6: Fix use-after-free in inet6_addr_del(). syzbot reported use-after-free of inet6_ifaddr in inet6_addr_del(). [0] The cited commit accidentally moved ipv6_del_addr() for mngtmpaddr before reading its ifp->flags for temporary addresses in inet6_addr_del(). Let's move ipv6_del_addr() down to fix the UAF. [0]: BUG: KASAN: slab-use-after-free in inet6_addr_del.constprop.0+0x67a/0x6b0 net/ipv6/addrconf.c:3117 Read of size 4 at addr ffff88807b89c86c by task syz.3.1618/9593 CPU: 0 UID: 0 PID: 9593 Comm: syz.3.1618 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xcd/0x630 mm/kasan/report.c:482 kasan_report+0xe0/0x110 mm/kasan/report.c:595 inet6_addr_del.constprop.0+0x67a/0x6b0 net/ipv6/addrconf.c:3117 addrconf_del_ifaddr+0x11e/0x190 net/ipv6/addrconf.c:3181 inet6_ioctl+0x1e5/0x2b0 net/ipv6/af_inet6.c:582 sock_do_ioctl+0x118/0x280 net/socket.c:1254 sock_ioctl+0x227/0x6b0 net/socket.c:1375 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl fs/ioctl.c:583 [inline] __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64

Announced Source revision 1
Original source ↗

CVE-2026-23010

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-2026-23010

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": "ca97dd10424860a3806ad3a9e26b9dce2901ee0c",
        "lessThan": "6e89d60b4f03014f7d412ce64b17a840840d490e",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "836deb96383ed9c1a411f172954d74b3f74ec6ac",
        "lessThan": "9356b69d03d0f50cce91cebdabd33dda023fbd64",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "cb74207ef98317f8874a0b9780bb339c2eb700b0",
        "lessThan": "2684610a9c9c53f262fd864fa5c407e79f304804",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "00b5b7aab9e422d00d5a9d03d7e0760a76b5d57f",
        "lessThan": "8b6dcb565e419846bd521e31d5e1f98e4d0e1179",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "00b5b7aab9e422d00d5a9d03d7e0760a76b5d57f",
        "lessThan": "ddf96c393a33aef4887e2e406c76c2f8cda1419c",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "851b3bb105c595cc20b8dcc1b4de029061ce2b76",
        "versionType": "git"
      },
      {
        "status": "affected",
        "version": "6.1.120",
        "lessThan": "6.1.162",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.6.64",
        "lessThan": "6.6.122",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.12.2",
        "lessThan": "6.12.67",
        "versionType": "semver"
      },
      {
        "status": "affected",
        "version": "6.11.11",
        "lessThan": "6.12",
        "versionType": "semver"
      }
    ],
    "programFiles": [
      "net/ipv6/addrconf.c"
    ],
    "defaultStatus": "unaffected"
  },
  {
    "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git",
    "vendor": "Linux",
    "product": "Linux",
    "versions": [
      {
        "status": "affected",
        "version": "6.13"
      },
      {
        "status": "unaffected",
        "version": "0",
        "lessThan": "6.13",
        "versionType": "semver"
      },
      {
        "status": "unaffected",
        "version": "6.1.162",
        "versionType": "semver",
        "lessThanOrEqual": "6.1.*"
      },
      {
        "status": "unaffected",
        "version": "6.6.122",
        "versionType": "semver",
        "lessThanOrEqual": "6.6.*"
      },
      {
        "status": "unaffected",
        "version": "6.12.67",
        "versionType": "semver",
        "lessThanOrEqual": "6.12.*"
      },
      {
        "status": "unaffected",
        "version": "6.18.7",
        "versionType": "semver",
        "lessThanOrEqual": "6.18.*"
      },
      {
        "status": "unaffected",
        "version": "6.19",
        "versionType": "original_commit_for_fix",
        "lessThanOrEqual": "*"
      }
    ],
    "programFiles": [
      "net/ipv6/addrconf.c"
    ],
    "defaultStatus": "affected"
  }
]
Related CVEs
CVE-2026-23010

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#27193 · Revision 1
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Publisher date
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