{"id":"DEBIAN-CVE-2022-49810","details":"In the Linux kernel, the following vulnerability has been resolved:  netfs: Fix missing xas_retry() calls in xarray iteration  netfslib has a number of places in which it performs iteration of an xarray whilst being under the RCU read lock.  It *should* call xas_retry() as the first thing inside of the loop and do \"continue\" if it returns true in case the xarray walker passed out a special value indicating that the walk needs to be redone from the root[*].  Fix this by adding the missing retry checks.  [*] I wonder if this should be done inside xas_find(), xas_next_node() and     suchlike, but I'm told that's not an simple change to effect.  This can cause an oops like that below.  Note the faulting address - this is an internal value (|0x2) returned from xarray.  BUG: kernel NULL pointer dereference, address: 0000000000000402 ... RIP: 0010:netfs_rreq_unlock+0xef/0x380 [netfs] ... Call Trace:  netfs_rreq_assess+0xa6/0x240 [netfs]  netfs_readpage+0x173/0x3b0 [netfs]  ? init_wait_var_entry+0x50/0x50  filemap_read_page+0x33/0xf0  filemap_get_pages+0x2f2/0x3f0  filemap_read+0xaa/0x320  ? do_filp_open+0xb2/0x150  ? rmqueue+0x3be/0xe10  ceph_read_iter+0x1fe/0x680 [ceph]  ? new_sync_read+0x115/0x1a0  new_sync_read+0x115/0x1a0  vfs_read+0xf3/0x180  ksys_read+0x5f/0xe0  do_syscall_64+0x38/0x90  entry_SYSCALL_64_after_hwframe+0x44/0xae  Changes: ======== ver #2)  - Changed an unsigned int to a size_t to reduce the likelihood of an    overflow as per Willy's suggestion.  - Added an additional patch to fix the maths.","modified":"2026-08-27T23:04:30.511154938Z","published":"2025-05-01T15:16:04.347Z","upstream":["CVE-2022-49810"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2022-49810"}],"affected":[{"package":{"name":"linux","ecosystem":"Debian:12","purl":"pkg:deb/debian/linux?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49810.json"}},{"package":{"name":"linux","ecosystem":"Debian:13","purl":"pkg:deb/debian/linux?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49810.json"}},{"package":{"name":"linux","ecosystem":"Debian:14","purl":"pkg:deb/debian/linux?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"6.0.10-1"}]}],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/osv-test-debian-osv/debian-cve-osv/DEBIAN-CVE-2022-49810.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H"}]}