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CVE-2026-99008

CVE-2026-99008 · Bluetooth: RFCOMM: Fix NULL tty_dev dereference in rfcomm_dev_shutdown

This page contains facts from public vulnerability sources. Check the original advisory before updating.

This page shows selected source facts. See the linked advisories for the complete description and affected versions.

In the Linux kernel, the following vulnerability has been resolved: Bluetooth: RFCOMM: Fix NULL tty_dev dereference in rfcomm_dev_shutdown syzbot hit a NULL pointer dereference in rfcomm_dev_shutdown() when an RFCOMM tty is closed. rfcomm_dev_add() puts the new device on rfcomm_dev_list first and only then registers the tty device and saves it in dev->tty_dev. If that registration fails, dev->tty_dev is never set at all. The device can be looked up in the meantime, so an open() of /dev/rfcommN gets through rfcomm_tty_install() and attaches to it. When that tty is closed again, rfcomm_dev_shutdown() uses dev->tty_dev without checking it: Oops: general protection fault, probably for non-canonical address KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] RIP: 0010:rfcomm_dev_shutdown+0x48/0xb0 net/bluetooth/rfcomm/tty.c:131 Call Trace: tty_port_shutdown+0x1bf/0x220 drivers/tty/tty_port.c:372 tty_port_close+0x4e/0x150 drivers/tty/tty_port.c:705 tty_release+0x359/0x1670 drivers/tty/tty_io.c:1718 __fput+0x418/0xa50 fs/file_table.c:512 rfcomm_dev_destruct() already copes with a NULL dev->tty_dev. Add the same check to rfcomm_dev_shutdown(), so the tty device is only moved when it was actually registered.

Fix available

Published
Updated

Stack: system

Affected products and versions

  • linux

    Versions
    • ≥ cad348a17e170451ea8688b532a6ca3e98c63b60, < d5c372ad03330f02962d4860df4d355ab25487df: Affected (git)
    • ≥ cad348a17e170451ea8688b532a6ca3e98c63b60, < 3fd5164bdb04635caa7942ddb554b0ec699a9433: Affected (git)
    • ≥ cad348a17e170451ea8688b532a6ca3e98c63b60, < a661f401f83b8462f2d424e0a1a72b7681e92ea2: Affected (git)
    • ≥ cad348a17e170451ea8688b532a6ca3e98c63b60, < d0aef0b0374678153244f162df507106d728af39: Affected (git)
    • ≥ cad348a17e170451ea8688b532a6ca3e98c63b60, < 08e90633377f1b2567ab5ad6810b74c552246a07: Affected (git)

    Update to d5c372ad03330f02962d4860df4d355ab25487df

  • linux

    Versions
    • 3.12: Affected
    • ≥ 0, < 3.12: Not affected (semver)
    • ≥ 6.6.160, ≤ 6.6.*: Not affected (semver)
    • ≥ 6.12.113, ≤ 6.12.*: Not affected (semver)
    • ≥ 6.18.57, ≤ 6.18.*: Not affected (semver)
    • ≥ 7.2.11, ≤ 7.2.*: Not affected (semver)
    • ≥ 7.3: Not affected (original_commit_for_fix)

    No fix published

  • linux Debian:12

    Versions
    • 6.1.106-1
    • 6.1.106-2
    • 6.1.106-3
    • 6.1.112-1
    • 6.1.115-1
    • 6.1.119-1
    • 6.1.123-1
    • 6.1.124-1
    • 6.1.128-1
    • 6.1.129-1
    • 6.1.133-1
    • 6.1.135-1
    • 6.1.137-1
    • 6.1.139-1
    • 6.1.140-1
    • 6.1.147-1
    • 6.1.148-1
    • 6.1.153-1
    • 6.1.158-1
    • 6.1.159-1
    • 6.1.162-1
    • 6.1.164-1
    • 6.1.170-1
    • 6.1.170-2
    • 6.1.170-3
    • 6.1.172-1
    • 6.1.174-1
    • 6.1.176-1
    • 6.1.177-1
    • 6.1.180-1
    • 6.1.187-1
    • 6.1.190-1
    • 6.1.27-1
    • 6.1.37-1
    • 6.1.38-1
    • 6.1.38-2
    • 6.1.38-2~bpo11+1
    • 6.1.38-3
    • 6.1.38-4
    • 6.1.38-4~bpo11+1
    • 6.1.52-1
    • 6.1.55-1
    • 6.1.55-1~bpo11+1
    • 6.1.64-1
    • 6.1.66-1
    • 6.1.67-1
    • 6.1.69-1
    • 6.1.69-1~bpo11+1
    • 6.1.76-1
    • 6.1.76-1~bpo11+1
    • 6.1.82-1
    • 6.1.85-1
    • 6.1.90-1
    • 6.1.90-1~bpo11+1
    • 6.1.94-1
    • 6.1.94-1~bpo11+1
    • 6.1.98-1
    • 6.1.99-1
    • 6.10-1~exp1
    • 6.10.1-1~exp1
    • 6.10.11-1
    • 6.10.11-1~bpo12+1
    • 6.10.12-1
    • 6.10.3-1
    • 6.10.4-1
    • 6.10.6-1
    • 6.10.6-1~bpo12+1
    • 6.10.7-1
    • 6.10.9-1
    • 6.11-1~exp1
    • 6.11.10-1
    • 6.11.10-1~bpo12+1
    • 6.11.2-1
    • 6.11.4-1
    • 6.11.5-1
    • 6.11.5-1~bpo12+1
    • 6.11.6-1
    • 6.11.7-1
    • 6.11.9-1
    • 6.11~rc4-1~exp1
    • 6.11~rc5-1~exp1
    • 6.12.10-1
    • 6.12.100-1
    • 6.12.101-1
    • 6.12.105-1
    • 6.12.107-1
    • 6.12.11-1
    • 6.12.11-1+alpha
    • 6.12.11-1+alpha.1
    • 6.12.111-1
    • 6.12.113-1
    • 6.12.12-1
    • 6.12.12-1~bpo12+1
    • 6.12.13-1
    • 6.12.15-1
    • 6.12.16-1
    • 6.12.17-1
    • 6.12.19-1
    • 6.12.20-1
    • 6.12.21-1
    • 6.12.22-1
    • 6.12.22-1~bpo12+1
    • 6.12.25-1
    • 6.12.27-1
    • 6.12.27-1~bpo12+1
    • 6.12.29-1
    • 6.12.3-1
    • 6.12.30-1
    • 6.12.30-1~bpo12+1
    • 6.12.31-1
    • 6.12.32-1
    • 6.12.32-1~bpo12+1
    • 6.12.33-1
    • 6.12.33-1~bpo12+1
    • 6.12.35-1
    • 6.12.35-1~bpo12+1
    • 6.12.37-1
    • 6.12.38-1
    • 6.12.38-1~bpo12+1
    • 6.12.41-1
    • 6.12.43-1
    • 6.12.43-1~bpo12+1
    • 6.12.48-1
    • 6.12.5-1
    • 6.12.57-1
    • 6.12.57-1~bpo12+1
    • 6.12.6-1
    • 6.12.63-1
    • 6.12.63-1~bpo12+1
    • 6.12.69-1
    • 6.12.69-1~bpo12+1
    • 6.12.73-1
    • 6.12.73-1~bpo12+1
    • 6.12.74-1
    • 6.12.74-2
    • 6.12.74-2~bpo12+1
    • 6.12.8-1
    • 6.12.85-1
    • 6.12.85-1~bpo12+1
    • 6.12.86-1
    • 6.12.86-1~bpo12+1
    • 6.12.88-1
    • 6.12.88-1~bpo12+1
    • 6.12.9-1
    • 6.12.9-1+alpha
    • 6.12.9-1~bpo12+1
    • 6.12.90-1
    • 6.12.90-1~bpo12+1
    • 6.12.90-2
    • 6.12.90-2~bpo12+1
    • 6.12.94-1
    • 6.12.94-1~bpo12+1
    • 6.12.95-1
    • 6.12.95-1~bpo12+1
    • 6.12.96-1
    • 6.12~rc6-1~exp1
    • 6.13.10-1~exp1
    • 6.13.11-1~exp1
    • 6.13.2-1~exp1
    • 6.13.3-1~exp1
    • 6.13.4-1~exp1
    • 6.13.5-1~exp1
    • 6.13.6-1~exp1
    • 6.13.7-1~exp1
    • 6.13.8-1~exp1
    • 6.13.9-1~exp1
    • 6.13~rc6-1~exp1
    • 6.13~rc7-1~exp1
    • 6.14.3-1~exp1
    • 6.14.5-1~exp1
    • 6.14.6-1~exp1
    • 6.15-1~exp1
    • 6.15.1-1~exp1
    • 6.15.2-1~exp1
    • 6.15.3-1~exp1
    • 6.15.4-1~exp1
    • 6.15.5-1~exp1
    • 6.15.6-1~exp1
    • 6.15~rc7-1~exp1
    • 6.16-1~exp1
    • 6.16.1-1~exp1
    • 6.16.10-1
    • 6.16.11-1
    • 6.16.12-1
    • 6.16.12-1~bpo13+1
    • 6.16.12-2
    • 6.16.3-1
    • 6.16.3-1~bpo13+1
    • 6.16.5-1
    • 6.16.6-1
    • 6.16.7-1
    • 6.16.8-1
    • 6.16.9-1
    • 6.16~rc7-1~exp1
    • 6.17.10-1
    • 6.17.11-1
    • 6.17.12-1
    • 6.17.13-1
    • 6.17.13-1~bpo13+1
    • 6.17.2-1~exp1
    • 6.17.5-1~exp1
    • 6.17.6-1
    • 6.17.7-1
    • 6.17.7-2
    • 6.17.8-1
    • 6.17.8-1~bpo13+1
    • 6.17.9-1
    • 6.18.1-1~exp1
    • 6.18.10-1
    • 6.18.12-1
    • 6.18.12-1~bpo13+1
    • 6.18.13-1
    • 6.18.14-1
    • 6.18.15-1
    • 6.18.15-1~bpo13+1
    • 6.18.2-1~exp1
    • 6.18.3-1
    • 6.18.5-1
    • 6.18.5-1~bpo13+1
    • 6.18.8-1
    • 6.18.9-1
    • 6.18.9-1~bpo13+1
    • 6.18~rc4-1~exp1
    • 6.18~rc4-1~exp2
    • 6.18~rc5-1~exp1
    • 6.18~rc6-1~exp1
    • 6.18~rc7-1~exp1
    • 6.19-1~exp1
    • 6.19.10-1
    • 6.19.10-1~bpo13+1
    • 6.19.11-1
    • 6.19.11-1~bpo13+1
    • 6.19.12-1
    • 6.19.13-1
    • 6.19.13-1~bpo13+1
    • 6.19.14-1
    • 6.19.14-1~bpo13+1
    • 6.19.2-1~exp1
    • 6.19.3-1~exp1
    • 6.19.4-1~exp1
    • 6.19.5-1~exp1
    • 6.19.6-1
    • 6.19.6-2
    • 6.19.6-2~bpo13+1
    • 6.19.8-1
    • 6.19.8-1~bpo13+1
    • 6.19~rc4-1~exp1
    • 6.19~rc5-1~exp1
    • 6.19~rc6-1~exp1
    • 6.19~rc7-1~exp1
    • 6.19~rc8-1~exp1
    • 6.3.1-1~exp1
    • 6.3.11-1
    • 6.3.2-1~exp1
    • 6.3.4-1~exp1
    • 6.3.5-1~exp1
    • 6.3.7-1
    • 6.3.7-1~bpo12+1
    • 6.4.1-1~exp1
    • 6.4.11-1
    • 6.4.13-1
    • 6.4.4-1
    • 6.4.4-1~bpo12+1
    • 6.4.4-2
    • 6.4.4-3
    • 6.4.4-3~bpo12+1
    • 6.4~rc6-1~exp1
    • 6.4~rc7-1~exp1
    • 6.5.1-1~exp1
    • 6.5.10-1
    • 6.5.10-1~bpo12+1
    • 6.5.13-1
    • 6.5.3-1
    • 6.5.3-1~bpo12+1
    • 6.5.6-1
    • 6.5.8-1
    • 6.5~rc4-1~exp1
    • 6.5~rc6-1~exp1
    • 6.5~rc7-1~exp1
    • 6.6.11-1
    • 6.6.13-1
    • 6.6.13-1~bpo12+1
    • 6.6.15-1
    • 6.6.15-2
    • 6.6.3-1~exp1
    • 6.6.4-1~exp1
    • 6.6.7-1~exp1
    • 6.6.8-1
    • 6.6.9-1
    • 6.7-1~exp1
    • 6.7.1-1~exp1
    • 6.7.12-1
    • 6.7.12-1~bpo12+1
    • 6.7.4-1~exp1
    • 6.7.7-1
    • 6.7.9-1
    • 6.7.9-2
    • 6.8.11-1
    • 6.8.12-1
    • 6.8.12-1~bpo12+1
    • 6.8.9-1
    • 6.9.10-1
    • 6.9.10-1~bpo12+1
    • 6.9.11-1
    • 6.9.12-1
    • 6.9.2-1~exp1
    • 6.9.7-1
    • 6.9.7-1~bpo12+1
    • 6.9.8-1
    • 6.9.9-1
    • 7.0-1~exp1
    • 7.0.1-1~exp1
    • 7.0.10-1

    No fix published

  • linux Debian:13

    Versions
    • 6.12.100-1
    • 6.12.101-1
    • 6.12.105-1
    • 6.12.107-1
    • 6.12.111-1
    • 6.12.38-1
    • 6.12.41-1
    • 6.12.43-1
    • 6.12.43-1~bpo12+1
    • 6.12.48-1
    • 6.12.57-1
    • 6.12.57-1~bpo12+1
    • 6.12.63-1
    • 6.12.63-1~bpo12+1
    • 6.12.69-1
    • 6.12.69-1~bpo12+1
    • 6.12.73-1
    • 6.12.73-1~bpo12+1
    • 6.12.74-1
    • 6.12.74-2
    • 6.12.74-2~bpo12+1
    • 6.12.85-1
    • 6.12.85-1~bpo12+1
    • 6.12.86-1
    • 6.12.86-1~bpo12+1
    • 6.12.88-1
    • 6.12.88-1~bpo12+1
    • 6.12.90-1
    • 6.12.90-1~bpo12+1
    • 6.12.90-2
    • 6.12.90-2~bpo12+1
    • 6.12.94-1
    • 6.12.94-1~bpo12+1
    • 6.12.95-1
    • 6.12.95-1~bpo12+1
    • 6.12.96-1
    Affected ranges
    • ECOSYSTEM: < 6.12.113-1

    Update to 6.12.113-1

  • linux Debian:14

    Versions
    • 6.12.100-1
    • 6.12.101-1
    • 6.12.105-1
    • 6.12.107-1
    • 6.12.111-1
    • 6.12.113-1
    • 6.12.38-1
    • 6.12.41-1
    • 6.12.43-1
    • 6.12.43-1~bpo12+1
    • 6.12.48-1
    • 6.12.57-1
    • 6.12.57-1~bpo12+1
    • 6.12.63-1
    • 6.12.63-1~bpo12+1
    • 6.12.69-1
    • 6.12.69-1~bpo12+1
    • 6.12.73-1
    • 6.12.73-1~bpo12+1
    • 6.12.74-1
    • 6.12.74-2
    • 6.12.74-2~bpo12+1
    • 6.12.85-1
    • 6.12.85-1~bpo12+1
    • 6.12.86-1
    • 6.12.86-1~bpo12+1
    • 6.12.88-1
    • 6.12.88-1~bpo12+1
    • 6.12.90-1
    • 6.12.90-1~bpo12+1
    • 6.12.90-2
    • 6.12.90-2~bpo12+1
    • 6.12.94-1
    • 6.12.94-1~bpo12+1
    • 6.12.95-1
    • 6.12.95-1~bpo12+1
    • 6.12.96-1
    • 6.13.10-1~exp1
    • 6.13.11-1~exp1
    • 6.13.2-1~exp1
    • 6.13.3-1~exp1
    • 6.13.4-1~exp1
    • 6.13.5-1~exp1
    • 6.13.6-1~exp1
    • 6.13.7-1~exp1
    • 6.13.8-1~exp1
    • 6.13.9-1~exp1
    • 6.13~rc6-1~exp1
    • 6.13~rc7-1~exp1
    • 6.14.3-1~exp1
    • 6.14.5-1~exp1
    • 6.14.6-1~exp1
    • 6.15-1~exp1
    • 6.15.1-1~exp1
    • 6.15.2-1~exp1
    • 6.15.3-1~exp1
    • 6.15.4-1~exp1
    • 6.15.5-1~exp1
    • 6.15.6-1~exp1
    • 6.15~rc7-1~exp1
    • 6.16-1~exp1
    • 6.16.1-1~exp1
    • 6.16.10-1
    • 6.16.11-1
    • 6.16.12-1
    • 6.16.12-1~bpo13+1
    • 6.16.12-2
    • 6.16.3-1
    • 6.16.3-1~bpo13+1
    • 6.16.5-1
    • 6.16.6-1
    • 6.16.7-1
    • 6.16.8-1
    • 6.16.9-1
    • 6.16~rc7-1~exp1
    • 6.17.10-1
    • 6.17.11-1
    • 6.17.12-1
    • 6.17.13-1
    • 6.17.13-1~bpo13+1
    • 6.17.2-1~exp1
    • 6.17.5-1~exp1
    • 6.17.6-1
    • 6.17.7-1
    • 6.17.7-2
    • 6.17.8-1
    • 6.17.8-1~bpo13+1
    • 6.17.9-1
    • 6.18.1-1~exp1
    • 6.18.10-1
    • 6.18.12-1
    • 6.18.12-1~bpo13+1
    • 6.18.13-1
    • 6.18.14-1
    • 6.18.15-1
    • 6.18.15-1~bpo13+1
    • 6.18.2-1~exp1
    • 6.18.3-1
    • 6.18.5-1
    • 6.18.5-1~bpo13+1
    • 6.18.8-1
    • 6.18.9-1
    • 6.18.9-1~bpo13+1
    • 6.18~rc4-1~exp1
    • 6.18~rc4-1~exp2
    • 6.18~rc5-1~exp1
    • 6.18~rc6-1~exp1
    • 6.18~rc7-1~exp1
    • 6.19-1~exp1
    • 6.19.10-1
    • 6.19.10-1~bpo13+1
    • 6.19.11-1
    • 6.19.11-1~bpo13+1
    • 6.19.12-1
    • 6.19.13-1
    • 6.19.13-1~bpo13+1
    • 6.19.14-1
    • 6.19.14-1~bpo13+1
    • 6.19.2-1~exp1
    • 6.19.3-1~exp1
    • 6.19.4-1~exp1
    • 6.19.5-1~exp1
    • 6.19.6-1
    • 6.19.6-2
    • 6.19.6-2~bpo13+1
    • 6.19.8-1
    • 6.19.8-1~bpo13+1
    • 6.19~rc4-1~exp1
    • 6.19~rc5-1~exp1
    • 6.19~rc6-1~exp1
    • 6.19~rc7-1~exp1
    • 6.19~rc8-1~exp1
    • 7.0-1~exp1
    • 7.0.1-1~exp1
    • 7.0.10-1
    • 7.0.10-1~bpo13+1
    • 7.0.12-1
    • 7.0.12-2
    • 7.0.12-2~bpo13+1
    • 7.0.13-1
    • 7.0.13-1~bpo13+1
    • 7.0.14-1
    • 7.0.3-1
    • 7.0.4-1
    • 7.0.4-1~bpo13+1
    • 7.0.7-1
    • 7.0.7-1~bpo13+1
    • 7.0.9-1
    • 7.0.9-1~bpo13+1
    • 7.1.1-1~exp1
    • 7.1.10-1
    • 7.1.12-1
    • 7.1.13-1
    • 7.1.13-1~bpo13+1
    • 7.1.2-1~exp1
    • 7.1.3-1
    • 7.1.3-1+sunvdc
    • 7.1.3-1~bpo13+1
    • 7.1.4-1
    • 7.1.5-1
    • 7.1.6-1
    • 7.1.7-1
    • 7.1.7-1~bpo13+1
    • 7.1.8-1
    • 7.1.8-1~bpo13+1
    • 7.1.8-2
    • 7.1.9-1
    • 7.1.9-1+sparc64
    • 7.1~rc2-1~exp1
    • 7.1~rc3-1~exp1
    • 7.1~rc4-1~exp1
    • 7.1~rc4-1~exp2
    • 7.1~rc5-1~exp1
    • 7.1~rc7-1~exp1
    • 7.2.10-1
    • 7.2.2-1~exp1
    • 7.2.3-1~exp1
    • 7.2.6-1
    • 7.2.6-1~bpo13+1
    • 7.2.7-1
    • 7.2.8-1
    • 7.2.9-1
    • 7.2.9-1~bpo13+1
    • 7.2~rc3-1~exp1
    • 7.2~rc5-1~exp1
    • 7.2~rc7-1~exp1
    Affected ranges
    • ECOSYSTEM: < 7.2.11-1

    Update to 7.2.11-1

Original sources

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