CVE-2021-47418
published 2024-05-21CVE-2021-47418: In the Linux kernel, the following vulnerability has been resolved: net_sched: fix NULL deref in fifo_set_limit() syzbot reported another NULL deref in…
PriorityP421medium5.5CVSS 3.1
AVLACLPRLUINSUCNINAH
EPSS
0.23%
14.3th percentile
In the Linux kernel, the following vulnerability has been resolved:
net_sched: fix NULL deref in fifo_set_limit()
syzbot reported another NULL deref in fifo_set_limit() [1]
I could repro the issue with :
unshare -n
tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit
tc qd replace dev lo parent 1:0 pfifo_fast
tc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit
pfifo_fast does not have a change() operation.
Make fifo_set_limit() more robust about this.
[1]
BUG: kernel NULL pointer dereference, address: 0000000000000000
PGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:0x0
Code: Unable to access opcode bytes at RIP 0xffffffffffffffd6.
RSP: 0018:ffffc9000e2f7310 EFLAGS: 00010246
RAX: dffffc0000000000 RBX: ffffffff8d6ecc00 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffff888024c27910 RDI: ffff888071e34000
RBP: ffff888071e34000 R08: 0000000000000001 R09: ffffffff8fcfb947
R10: 0000000000000001 R11: 0000000000000000 R12: ffff888024c27910
R13: ffff888071e34018 R14: 0000000000000000 R15: ffff88801ef74800
FS: 00007f321d897700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffffd6 CR3: 00000000722c3000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
fifo_set_limit net/sched/sch_fifo.c:242 [inline]
fifo_set_limit+0x198/0x210 net/sched/sch_fifo.c:227
tbf_change+0x6ec/0x16d0 net/sched/sch_tbf.c:418
qdisc_change net/sched/sch_api.c:1332 [inline]
tc_modify_qdisc+0xd9a/0x1a60 net/sched/sch_api.c:1634
rtnetlink_rcv_msg+0x413/0xb80 net/core/rtnetlink.c:5572
netlink_rcv_skb+0x153/0x420 net/netlink/af_netlink.c:2504
netlink_unicast_kernel net/
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | linux | < linux 5.14.12-1 (bookworm) | linux 5.14.12-1 (bookworm) |
| linux | linux | — | — |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < 0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52 | 0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52 |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < 08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4 | 08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4 |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < 26af64d71b6277841285fa40e3f7164a378dfda9 | 26af64d71b6277841285fa40e3f7164a378dfda9 |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < d07098f45be868a9cdce6c616563c36c64dbbd87 | d07098f45be868a9cdce6c616563c36c64dbbd87 |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < c951a3be5e8803e93bb49a0aca0d30457d3c1b67 | c951a3be5e8803e93bb49a0aca0d30457d3c1b67 |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < acff2d182c0768a713cee77442caeb07668bd68f | acff2d182c0768a713cee77442caeb07668bd68f |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < fb58cd7991747b5e0b110c98c922d7b0e47a1f14 | fb58cd7991747b5e0b110c98c922d7b0e47a1f14 |
| linux | linux | >= fb0305ce1b03f6ff17f84f2c63daccecb45f2805 < 560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc | 560ee196fe9e5037e5015e2cdb14b3aecb1cd7dc |
| linux | linux_kernel | — | — |
| linux | linux_kernel | >= 0 < 5.10.84-1 | 5.10.84-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 0 < 5.14.12-1 | 5.14.12-1 |
| linux | linux_kernel | >= 2.6.27 < 4.4.289 | 4.4.289 |
| linux | linux_kernel | >= 4.10 < 4.14.251 | 4.14.251 |
| linux | linux_kernel | >= 4.15 < 4.19.211 | 4.19.211 |
| linux | linux_kernel | >= 4.20 < 5.4.153 | 5.4.153 |
| linux | linux_kernel | >= 4.5 < 4.9.287 | 4.9.287 |
| linux | linux_kernel | >= 5.11 < 5.14.12 | 5.14.12 |
| linux | linux_kernel | >= 5.5 < 5.10.73 | 5.10.73 |
CVSS provenance
nvdv3.15.5MEDIUMCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H
osv5.5MEDIUM
vendor_debian5.5MEDIUM
vendor_redhat5.5MEDIUM
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Red Hat
kernel: net_sched: fix NULL deref in fifo_set_limit()
vendor_redhat·2024-05-21·CVSS 5.5
CVE-2021-47418 [MEDIUM] CWE-476 kernel: net_sched: fix NULL deref in fifo_set_limit()
kernel: net_sched: fix NULL deref in fifo_set_limit()
In the Linux kernel, the following vulnerability has been resolved:
net_sched: fix NULL deref in fifo_set_limit()
syzbot reported another NULL deref in fifo_set_limit() [1]
I could repro the issue with :
unshare -n
tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit
tc qd replace dev lo parent 1:0 pfifo_fast
tc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit
pfifo_fast does not have a change() operation.
Make fifo_set_limit() more robust about this.
[1]
BUG: kernel NULL pointer dereference, address: 0000000000000000
PGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0
Hardware name: Goo
Debian
CVE-2021-47418: linux - In the Linux kernel, the following vulnerability has been resolved: net_sched: ...
vendor_debian·2021·CVSS 5.5
CVE-2021-47418 [MEDIUM] CVE-2021-47418: linux - In the Linux kernel, the following vulnerability has been resolved: net_sched: ...
In the Linux kernel, the following vulnerability has been resolved: net_sched: fix NULL deref in fifo_set_limit() syzbot reported another NULL deref in fifo_set_limit() [1] I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev lo parent 1:0 pfifo_fast tc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit pfifo_fast does not have a change() operation. Make fifo_set_limit() more robust about this. [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS G
OSV
CVE-2021-47418: In the Linux kernel, the following vulnerability has been resolved: net_sched: fix NULL deref in fifo_set_limit() syzbot reported another NULL deref i
osv·2024-05-21·CVSS 5.5
CVE-2021-47418 [MEDIUM] CVE-2021-47418: In the Linux kernel, the following vulnerability has been resolved: net_sched: fix NULL deref in fifo_set_limit() syzbot reported another NULL deref i
In the Linux kernel, the following vulnerability has been resolved: net_sched: fix NULL deref in fifo_set_limit() syzbot reported another NULL deref in fifo_set_limit() [1] I could repro the issue with : unshare -n tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit tc qd replace dev lo parent 1:0 pfifo_fast tc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit pfifo_fast does not have a change() operation. Make fifo_set_limit() more robust about this. [1] BUG: kernel NULL pointer dereference, address: 0000000000000000 PGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0 Oops: 0010 [#1] PREEMPT SMP KASAN CPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS G
GHSA
GHSA-8p4f-x4p9-vv9j: In the Linux kernel, the following vulnerability has been resolved:
net_sched: fix NULL deref in fifo_set_limit()
syzbot reported another NULL deref
ghsa_unreviewed·2024-05-21
CVE-2021-47418 [MEDIUM] CWE-476 GHSA-8p4f-x4p9-vv9j: In the Linux kernel, the following vulnerability has been resolved:
net_sched: fix NULL deref in fifo_set_limit()
syzbot reported another NULL deref
In the Linux kernel, the following vulnerability has been resolved:
net_sched: fix NULL deref in fifo_set_limit()
syzbot reported another NULL deref in fifo_set_limit() [1]
I could repro the issue with :
unshare -n
tc qd add dev lo root handle 1:0 tbf limit 200000 burst 70000 rate 100Mbit
tc qd replace dev lo parent 1:0 pfifo_fast
tc qd change dev lo root handle 1:0 tbf limit 300000 burst 70000 rate 100Mbit
pfifo_fast does not have a change() operation.
Make fifo_set_limit() more robust about this.
[1]
BUG: kernel NULL pointer dereference, address: 0000000000000000
PGD 1cf99067 P4D 1cf99067 PUD 7ca49067 PMD 0
Oops: 0010 [#1] PREEMPT SMP KASAN
CPU: 1 PID: 14443 Comm: syz-executor959 Not tainted 5.15.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine,
No detection rules found.
No public exploits indexed.
https://git.kernel.org/stable/c/08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4https://git.kernel.org/stable/c/0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52https://git.kernel.org/stable/c/26af64d71b6277841285fa40e3f7164a378dfda9https://git.kernel.org/stable/c/560ee196fe9e5037e5015e2cdb14b3aecb1cd7dchttps://git.kernel.org/stable/c/acff2d182c0768a713cee77442caeb07668bd68fhttps://git.kernel.org/stable/c/c951a3be5e8803e93bb49a0aca0d30457d3c1b67https://git.kernel.org/stable/c/d07098f45be868a9cdce6c616563c36c64dbbd87https://git.kernel.org/stable/c/fb58cd7991747b5e0b110c98c922d7b0e47a1f14https://git.kernel.org/stable/c/08d7056e8e250fd2e67dbea5be5fdecdd75bf6b4https://git.kernel.org/stable/c/0dd7ddc462b9c2d31eb5a9926a2cc63eaa3e9f52https://git.kernel.org/stable/c/26af64d71b6277841285fa40e3f7164a378dfda9https://git.kernel.org/stable/c/560ee196fe9e5037e5015e2cdb14b3aecb1cd7dchttps://git.kernel.org/stable/c/acff2d182c0768a713cee77442caeb07668bd68fhttps://git.kernel.org/stable/c/c951a3be5e8803e93bb49a0aca0d30457d3c1b67https://git.kernel.org/stable/c/d07098f45be868a9cdce6c616563c36c64dbbd87https://git.kernel.org/stable/c/fb58cd7991747b5e0b110c98c922d7b0e47a1f14
2024-05-21
Published