CVE-2025-38640
- Source
- https://nvd.nist.gov/vuln/detail/CVE-2025-38640
- Import Source
- https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38640.json
- JSON Data
- https://api.test.osv.dev/v1/vulns/CVE-2025-38640
- Downstream
- Related
- Published
- 2025-08-22T16:00:46Z
- Modified
- 2025-10-10T16:22:57.441708Z
- Summary
- bpf: Disable migration in nf_hook_run_bpf().
- Details
-
In the Linux kernel, the following vulnerability has been resolved:
bpf: Disable migration in nfhookrun_bpf().
syzbot reported that the netfilter bpf prog can be called without migration disabled in xmit path.
Then the assertion in _bpfprog_run() fails, triggering the splat below. [0]
Let's use bpfprogrunpinoncpu() in nfhookrunbpf().
inatomic(): 0, irqsdisabled(): 0, migrationdisabled() 0 pid: 5829, name: sshd-session 3 locks held by sshd-session/5829: #0: ffff88807b4e4218 (sklock-AFINET){+.+.}-{0:0}, at: locksock include/net/sock.h:1667 [inline] #0: ffff88807b4e4218 (sklock-AFINET){+.+.}-{0:0}, at: tcpsendmsg+0x20/0x50 net/ipv4/tcp.c:1395 #1: ffffffff8e5c4e00 (rcureadlock){....}-{1:3}, at: rculockacquire include/linux/rcupdate.h:331 [inline] #1: ffffffff8e5c4e00 (rcureadlock){....}-{1:3}, at: rcureadlock include/linux/rcupdate.h:841 [inline] #1: ffffffff8e5c4e00 (rcureadlock){....}-{1:3}, at: _ipqueuexmit+0x69/0x26c0 net/ipv4/ipoutput.c:470 #2: ffffffff8e5c4e00 (rcureadlock){....}-{1:3}, at: rculockacquire include/linux/rcupdate.h:331 [inline] #2: ffffffff8e5c4e00 (rcureadlock){....}-{1:3}, at: rcureadlock include/linux/rcupdate.h:841 [inline] #2: ffffffff8e5c4e00 (rcureadlock){....}-{1:3}, at: nfhook+0xb2/0x680 include/linux/netfilter.h:241 CPU: 0 UID: 0 PID: 5829 Comm: sshd-session Not tainted 6.16.0-rc6-syzkaller-00002-g155a3c003e55 #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025 Call Trace: <TASK> _dumpstack lib/dumpstack.c:94 [inline] dumpstacklvl+0x16c/0x1f0 lib/dumpstack.c:120 _cantmigrate kernel/sched/core.c:8860 [inline] _cantmigrate+0x1c7/0x250 kernel/sched/core.c:8834 _bpfprogrun include/linux/filter.h:703 [inline] bpfprogrun include/linux/filter.h:725 [inline] nfhookrunbpf+0x83/0x1e0 net/netfilter/nfbpflink.c:20 nfhookentryhookfn include/linux/netfilter.h:157 [inline] nfhookslow+0xbb/0x200 net/netfilter/core.c:623 nfhook+0x370/0x680 include/linux/netfilter.h:272 NFHOOKCOND include/linux/netfilter.h:305 [inline] ipoutput+0x1bc/0x2a0 net/ipv4/ipoutput.c:433 dstoutput include/net/dst.h:459 [inline] iplocalout net/ipv4/ipoutput.c:129 [inline] _ipqueuexmit+0x1d7d/0x26c0 net/ipv4/ipoutput.c:527 _tcptransmitskb+0x2686/0x3e90 net/ipv4/tcpoutput.c:1479 tcptransmitskb net/ipv4/tcpoutput.c:1497 [inline] tcpwritexmit+0x1274/0x84e0 net/ipv4/tcpoutput.c:2838 _tcppushpendingframes+0xaf/0x390 net/ipv4/tcpoutput.c:3021 tcppush+0x225/0x700 net/ipv4/tcp.c:759 tcpsendmsglocked+0x1870/0x42b0 net/ipv4/tcp.c:1359 tcpsendmsg+0x2e/0x50 net/ipv4/tcp.c:1396 inetsendmsg+0xb9/0x140 net/ipv4/afinet.c:851 socksendmsgnosec net/socket.c:712 [inline] _socksendmsg net/socket.c:727 [inline] sockwriteiter+0x4aa/0x5b0 net/socket.c:1131 newsyncwrite fs/readwrite.c:593 [inline] vfswrite+0x6c7/0x1150 fs/readwrite.c:686 ksyswrite+0x1f8/0x250 fs/readwrite.c:738 dosyscallx64 arch/x86/entry/syscall64.c:63 [inline] dosyscall64+0xcd/0x4c0 arch/x86/entry/syscall64.c:94 entrySYSCALL64afterhwframe+0x77/0x7f RIP: 0033:0x7fe7d365d407 Code: 48 89 fa 4c 89 df e8 38 aa 00 00 8b 93 08 03 00 00 59 5e 48 83 f8 fc 74 1a 5b c3 0f 1f 84 00 00 00 00 00 48 8b 44 24 10 0f 05 <5b> c3 0f 1f 80 00 00 00 00 83 e2 39 83 fa 08 75 de e8 23 ff ff ff RSP:
- References
-
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- https://git.kernel.org/stable/c/0a356da16fb933abbeeb7aea038c351f3342cd3f
- https://git.kernel.org/stable/c/17ce3e5949bc37557305ad46316f41c7875d6366
- https://git.kernel.org/stable/c/62f6175d145e00fc999fd2fcbffad3f59253c66a
- https://git.kernel.org/stable/c/e0199c28167a8a4adec036005a8df268b2b68529
- https://git.kernel.org/stable/c/ee2502485702e4398cd74dbfb288bfa111d25e62
Affected packages
Git / git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
Affected ranges
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd9c663b9ad67dedfc9a3fd3429ddd3e83782b4dFixedee2502485702e4398cd74dbfb288bfa111d25e62
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd9c663b9ad67dedfc9a3fd3429ddd3e83782b4dFixed62f6175d145e00fc999fd2fcbffad3f59253c66a
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd9c663b9ad67dedfc9a3fd3429ddd3e83782b4dFixede0199c28167a8a4adec036005a8df268b2b68529
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd9c663b9ad67dedfc9a3fd3429ddd3e83782b4dFixed0a356da16fb933abbeeb7aea038c351f3342cd3f
- Type
- GIT
- Repo
- https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
- Events
-
Introducedfd9c663b9ad67dedfc9a3fd3429ddd3e83782b4dFixed17ce3e5949bc37557305ad46316f41c7875d6366