CVE-2025-38263

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Source
https://nvd.nist.gov/vuln/detail/CVE-2025-38263
Import Source
https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-38263.json
JSON Data
https://api.test.osv.dev/v1/vulns/CVE-2025-38263
Downstream
Related
Published
2025-07-09T11:15:28Z
Modified
2025-08-12T21:51:17.564215Z
Summary
[none]
Details

In the Linux kernel, the following vulnerability has been resolved:

bcache: fix NULL pointer in cachesetflush()

  1. LINE#1794 - LINE#1887 is some codes about function of bchcacheset_alloc().
  2. LINE#2078 - LINE#2142 is some codes about function of registercacheset().

  3. registercacheset() will call bchcacheset_alloc() in LINE#2098.

    1794 struct cacheset *bchcachesetalloc(struct cachesb *sb) 1795 { ... 1860 if (!(c->devices = kcalloc(c->nruuids, sizeof(void *), GFPKERNEL)) || 1861 mempoolinitslabpool(&c->search, 32, bchsearchcache) || 1862 mempoolinitkmallocpool(&c->biometa, 2, 1863 sizeof(struct bbio) + sizeof(struct biovec) * 1864 bucketpages(c)) || 1865 mempoolinitkmallocpool(&c->filliter, 1, itersize) || 1866 biosetinit(&c->biosplit, 4, offsetof(struct bbio, bio), 1867 BIOSETNEEDBVECS|BIOSETNEEDRESCUER) || 1868 !(c->uuids = allocbucketpages(GFPKERNEL, c)) || 1869 !(c->movinggcwq = allocworkqueue("bcachegc", 1870 WQMEMRECLAIM, 0)) || 1871 bchjournalalloc(c) || 1872 bchbtreecachealloc(c) || 1873 bchopenbucketsalloc(c) || 1874 bchbsetsortstateinit(&c->sort, ilog2(c->btreepages))) 1875 goto err; ^^^^^^^^ 1876 ... 1883 return c; 1884 err: 1885 bchcachesetunregister(c); ^^^^^^^^^^^^^^^^^^^^^^^^^^^ 1886 return NULL; 1887 } ... 2078 static const char *registercacheset(struct cache *ca) 2079 { ... 2098 c = bchcachesetalloc(&ca->sb); 2099 if (!c) 2100 return err; ^^^^^^^^^^ ... 2128 ca->set = c; 2129 ca->set->cache[ca->sb.nrthisdev] = ca; ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ ... 2138 return NULL; 2139 err: 2140 bchcachesetunregister(c); 2141 return err; 2142 }

(1) If LINE#1860 - LINE#1874 is true, then do 'goto err'(LINE#1875) and call bchcacheset_unregister()(LINE#1885). (2) As (1) return NULL(LINE#1886), LINE#2098 - LINE#2100 would return. (3) As (2) has returned, LINE#2128 - LINE#2129 would do not give the value to c->cache[], it means that c->cache[] is NULL.

LINE#1624 - LINE#1665 is some codes about function of cachesetflush(). As (1), in LINE#1885 call bchcachesetunregister() ---> bchcachesetstop() ---> closurequeue() -.-> cacheset_flush() (as below LINE#1624)

1624 static void cachesetflush(struct closure *cl) 1625 { ... 1654 foreachcache(ca, c, i) 1655 if (ca->allocthread) ^^ 1656 kthreadstop(ca->alloc_thread); ... 1665 }

(4) In LINE#1655 ca is NULL(see (3)) in cachesetflush() then the kernel crash occurred as below: [ 846.712887] bcache: registercache() error drbd6: cannot allocate memory [ 846.713242] bcache: registerbcache() error : failed to register device [ 846.713336] bcache: cachesetfree() Cache set 2f84bdc1-498a-4f2f-98a7-01946bf54287 unregistered [ 846.713768] BUG: unable to handle kernel NULL pointer dereference at 00000000000009f8 [ 846.714790] PGD 0 P4D 0 [ 846.715129] Oops: 0000 [#1] SMP PTI [ 846.715472] CPU: 19 PID: 5057 Comm: kworker/19:16 Kdump: loaded Tainted: G OE --------- - - 4.18.0-147.5.1.el81.5es.3.x8664 #1 [ 846.716082] Hardware name: ESPAN GI-25212/X11DPL-i, BIOS 2.1 06/15/2018 [ 846.716451] Workqueue: events cachesetflush [bcache] [ 846.716808] RIP: 0010:cachesetflush+0xc9/0x1b0 [bcache] [ 846.717155] Code: 00 4c 89 a5 b0 03 00 00 48 8b 85 68 f6 ff ff a8 08 0f 84 88 00 00 00 31 db 66 83 bd 3c f7 ff ff 00 48 8b 85 48 ff ff ff 74 28 <48> 8b b8 f8 09 00 0 ---truncated---

References

Affected packages

Debian:11 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

5.*

5.10.46-4
5.10.46-5
5.10.70-1~bpo10+1
5.10.70-1
5.10.84-1
5.10.92-1~bpo10+1
5.10.92-1
5.10.92-2
5.10.103-1~bpo10+1
5.10.103-1
5.10.106-1
5.10.113-1
5.10.120-1~bpo10+1
5.10.120-1
5.10.127-1
5.10.127-2~bpo10+1
5.10.127-2
5.10.136-1
5.10.140-1
5.10.148-1
5.10.149-1
5.10.149-2
5.10.158-1
5.10.158-2
5.10.162-1
5.10.178-1
5.10.178-2
5.10.178-3
5.10.179-1
5.10.179-2
5.10.179-3
5.10.179-4
5.10.179-5
5.10.191-1
5.10.197-1
5.10.205-1
5.10.205-2
5.10.209-1
5.10.209-2
5.10.216-1
5.10.218-1
5.10.221-1
5.10.223-1
5.10.226-1
5.10.234-1
5.10.237-1
5.13.9-1~exp1
5.13.9-1~exp2
5.13.12-1~exp1
5.14-1~exp1
5.14-1~exp2
5.14.1-1~exp1
5.14.2-1~exp1
5.14.3-1~exp1
5.14.6-1
5.14.6-2
5.14.6-3
5.14.9-1
5.14.9-2~bpo11+1
5.14.9-2
5.14.12-1
5.14.16-1
5.15-1~exp1
5.15.1-1~exp1
5.15.2-1~exp1
5.15.3-1
5.15.5-1
5.15.5-2~bpo11+1
5.15.5-2
5.15.15-1
5.15.15-2~bpo11+1
5.15.15-2
5.16~rc1-1~exp1
5.16~rc3-1~exp1
5.16~rc4-1~exp1
5.16~rc5-1~exp1
5.16~rc6-1~exp1
5.16~rc7-1~exp1
5.16~rc8-1~exp1
5.16.3-1~exp1
5.16.4-1~exp1
5.16.7-1
5.16.7-2
5.16.10-1
5.16.11-1~bpo11+1
5.16.11-1
5.16.12-1~bpo11+1
5.16.12-1
5.16.14-1
5.16.18-1
5.17~rc3-1~exp1
5.17~rc4-1~exp1
5.17~rc5-1~exp1
5.17~rc6-1~exp1
5.17~rc7-1~exp1
5.17~rc8-1~exp1
5.17.1-1~exp1
5.17.3-1
5.17.6-1
5.17.11-1
5.18-1~exp1
5.18.2-1~bpo11+1
5.18.2-1
5.18.5-1
5.18.14-1~bpo11+1
5.18.14-1
5.18.16-1~bpo11+1
5.18.16-1
5.19~rc4-1~exp1
5.19~rc6-1~exp1
5.19-1~exp1
5.19.6-1
5.19.11-1~bpo11+1
5.19.11-1

6.*

6.0~rc7-1~exp1
6.0-1~exp1
6.0.2-1
6.0.3-1~bpo11+1
6.0.3-1
6.0.5-1
6.0.6-1
6.0.6-2
6.0.7-1
6.0.8-1
6.0.10-1
6.0.10-2
6.0.12-1~bpo11+1
6.0.12-1
6.0.12-1+alpha
6.1~rc3-1~exp1
6.1~rc5-1~exp1
6.1~rc6-1~exp1
6.1~rc7-1~exp1
6.1~rc8-1~exp1
6.1.1-1~exp1
6.1.1-1~exp2
6.1.2-1~exp1
6.1.4-1
6.1.7-1
6.1.8-1
6.1.8-1+sh4
6.1.11-1
6.1.12-1~bpo11+1
6.1.12-1
6.1.15-1~bpo11+1
6.1.15-1
6.1.20-1~bpo11+1
6.1.20-1
6.1.20-2~bpo11+1
6.1.20-2
6.1.25-1
6.1.27-1~bpo11+1
6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
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
6.3.1-1~exp1
6.3.2-1~exp1
6.3.4-1~exp1
6.3.5-1~exp1
6.3.7-1~bpo12+1
6.3.7-1
6.3.11-1
6.4~rc6-1~exp1
6.4~rc7-1~exp1
6.4.1-1~exp1
6.4.4-1~bpo12+1
6.4.4-1
6.4.4-2
6.4.4-3~bpo12+1
6.4.4-3
6.4.11-1
6.4.13-1
6.5~rc4-1~exp1
6.5~rc6-1~exp1
6.5~rc7-1~exp1
6.5.1-1~exp1
6.5.3-1~bpo12+1
6.5.3-1
6.5.6-1
6.5.8-1
6.5.10-1~bpo12+1
6.5.10-1
6.5.13-1
6.6.3-1~exp1
6.6.4-1~exp1
6.6.7-1~exp1
6.6.8-1
6.6.9-1
6.6.11-1
6.6.13-1~bpo12+1
6.6.13-1
6.6.15-1
6.6.15-2
6.7-1~exp1
6.7.1-1~exp1
6.7.4-1~exp1
6.7.7-1
6.7.9-1
6.7.9-2
6.7.12-1~bpo12+1
6.7.12-1
6.8.9-1
6.8.11-1
6.8.12-1~bpo12+1
6.8.12-1
6.9.2-1~exp1
6.9.7-1~bpo12+1
6.9.7-1
6.9.8-1
6.9.9-1
6.9.10-1~bpo12+1
6.9.10-1
6.9.11-1
6.9.12-1
6.10-1~exp1
6.10.1-1~exp1
6.10.3-1
6.10.4-1
6.10.6-1~bpo12+1
6.10.6-1
6.10.7-1
6.10.9-1
6.10.11-1~bpo12+1
6.10.11-1
6.10.12-1
6.11~rc4-1~exp1
6.11~rc5-1~exp1
6.11-1~exp1
6.11.2-1
6.11.4-1
6.11.5-1~bpo12+1
6.11.5-1
6.11.6-1
6.11.7-1
6.11.9-1
6.11.10-1~bpo12+1
6.11.10-1
6.12~rc6-1~exp1
6.12.3-1
6.12.5-1
6.12.6-1
6.12.8-1
6.12.9-1~bpo12+1
6.12.9-1
6.12.9-1+alpha
6.12.10-1
6.12.11-1
6.12.11-1+alpha
6.12.11-1+alpha.1
6.12.12-1~bpo12+1
6.12.12-1
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~bpo12+1
6.12.22-1
6.12.25-1
6.12.27-1~bpo12+1
6.12.27-1
6.12.29-1
6.12.30-1~bpo12+1
6.12.30-1
6.12.31-1
6.12.32-1~bpo12+1
6.12.32-1
6.12.33-1~bpo12+1
6.12.33-1
6.12.35-1~bpo12+1
6.12.35-1
6.12.37-1
6.12.38-1~bpo12+1
6.12.38-1
6.13~rc6-1~exp1
6.13~rc7-1~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
6.13.10-1~exp1
6.13.11-1~exp1
6.14.3-1~exp1
6.14.5-1~exp1
6.14.6-1~exp1
6.15~rc7-1~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
6.16~rc7-1~exp1
6.16-1~exp1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:12 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.1.147-1

Affected versions

6.*

6.1.27-1
6.1.37-1
6.1.38-1
6.1.38-2~bpo11+1
6.1.38-2
6.1.38-3
6.1.38-4~bpo11+1
6.1.38-4
6.1.52-1
6.1.55-1~bpo11+1
6.1.55-1
6.1.64-1
6.1.66-1
6.1.67-1
6.1.69-1~bpo11+1
6.1.69-1
6.1.76-1~bpo11+1
6.1.76-1
6.1.82-1
6.1.85-1
6.1.90-1~bpo11+1
6.1.90-1
6.1.94-1~bpo11+1
6.1.94-1
6.1.98-1
6.1.99-1
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

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:13 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.12.37-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}

Debian:14 / linux

Package

Name
linux
Purl
pkg:deb/debian/linux?arch=source

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected
Fixed
6.12.37-1

Ecosystem specific 

{
    "urgency": "not yet assigned"
}